EP2584133B1 - Method for producing a seal in window renovation - Google Patents

Description

The invention relates to a method for sealing during window renovation.

Usually, during window renovation, the old window frames are first removed from the brickwork, e.g. by means of a suitable window joint saw. Both the interior plaster and the exterior plaster along a straight, sharply defined edge of the old window frame is separated and then removed. This leaves the old disassembled window between interior plaster and exterior plaster a circumferential channel-shaped recess that extends to the raw masonry or even into this. Such recesses are different depths, usually between 10 mm and 100 mm.

Usually modern window frames have a greater width than old window frames, so that when installing the new window, the window frame is no longer used in the recess, but remains outside of the recess. The circumferential recess must be filled in the installed state of the new window with a sealing and insulating material, so that the space between the bottom of the recess and the new window frame is sealed in terms of good building insulation according to the generally accepted rules of technology.

So far, for example, injected polyurethane locating foams or mineral fiber insulating materials have been used to seal the recess. Similarly, the use of sealing tapes made of soft foam in question.

DE 20 2005 013 196 U1 discloses a method for sealing frame.

In the latter option flexible foam sealing tapes have been mounted in advantageous embodiments directly to the new window frame. For example, this is off DE 10 2008 025 019 A1 a window frame equipped with a soft foam sealing tape is known. The sealing tape can be fixed between two angular ends of two edge profile strips of the window frame by a rigid layer on which the soft foam is arranged, is introduced into the space between the profile strips and is secured by the angular ends against slipping out. By destroying the rigid layer, the foam is finally released for expansion and thus seals the window frame in the direction of the masonry. In the aforementioned window renovation, however, the rigid layer is difficult to access in the desired installation position of the new window frame, and also can a complete sealing of the recess with the soft foam tape can not be checked. In other words, the combination of window frames described here with already pre-assembled sealing tape for the above-described window renovation is not optimally suited.

The same applies to combinations of window frames with pre-assembled sealing tapes according to FIG EP 2 333 177 A1 or EP 2 336 442 A1 , In these two documents, the sealing tape again has a layer of flexible foam and a rigid layer. Here, the rigid layer to release the soft foam must not be destroyed, and the soft foam is disposed on the masonry facing side of the rigid layer. The rigid layer is finally pre-assembled by means of various attachment mechanisms in profile channels of the window frame.

A similar sealing profile is off DE 20 2010 008 720 U1 known as the closest prior art. This sealing profile comprises a rigid layer, which is firmly connected by an adhesive bond with a frame profile of a window. In addition, a flexible foam tape is attached to the rigid layer, which is initially held by a cover in a compressed state. For installation, the rigid layer of the sealing profile is first glued to the frame profile of the window and then the window is inserted into the desired masonry opening. Then the cover is removed, so that the flexible foam tape can expand in the direction of masonry and thus seals the gap between the frame profile and masonry.

The present invention has for its object to provide a method for sealing in the fenestration, with which the sealing of the new window frame in masonry can be ensured in an efficient and safe manner and can be performed at the same time in a simple way by the craftsman.

This object is solved by the features of claim 1.

• Bereitstellen eines Dichtbands, das eine erste Schicht aus weichem, sich nach Kompression zurückstellenden Schaumstoff und eine zweite Schicht aus einem biegesteifen Material aufweist;
• Einfügen des Dichtbands in eine kanalförmige Ausnehmung eines Mauerwerks, das von einem Boden und zwei Seitenwänden begrenzt ist und einen offenen Zugangsabschnitt aufweist, wobei die erste Schicht des Dichtbands in Richtung des Bodens der Ausnehmung ausgerichtet wird und in eingefügtem Zustand zumindest teilkomprimiert ist;
• zumindest vorübergehendes Einschränken der Ausdehnung der ersten Schicht des Dichtbands durch Verklemmen der zweiten Schicht direkt an den Seitenwänden der Ausnehmung oder indirekt an den Seitenwänden der Ausnehmung unter Zwischenschaltung eines Klemmhilfsmittels, oder zumindest vorübergehendes Einschränken der Ausdehnung der ersten Schicht des Dichtbands mittels mehrerer Rückhalteelemente, die auf die zweite Schicht des Dichtbands eine Rückhaltefunktion ausüben, wobei während der zumindest vorübergehenden Einschränkung der Ausdehnung der ersten Schicht des Dichtbands ein Fensterrahmen im Bereich der mit dem Dichtband gefüllten Ausnehmung eingesetzt wird.

According to the invention, the method for sealing during window renovation comprises the following steps:

• Providing a sealing tape comprising a first layer of soft, compression-recovering foam and a second layer of a rigid material;
• Inserting the sealing band in a channel-shaped recess of a masonry, which is bounded by a bottom and two side walls and having an open access portion, wherein the first layer of the sealing band is aligned towards the bottom of the recess and at least partially compressed in the inserted state;
• at least temporarily restricting the expansion of the first layer of the sealing tape by clamping the second layer directly on the side walls of the recess or indirectly on the side walls of the recess with the interposition of a Klemmhilfsmittels, or at least temporarily restricting the Expansion of the first layer of the sealing band by means of a plurality of retaining elements which exert a retaining function on the second layer of the sealing band, wherein during the at least temporary restriction of the expansion of the first layer of the sealing band, a window frame is used in the region of the sealing strip filled with the recess.

With such a method, a complete and secure sealing or insulation of a channel-shaped recess of masonry can be ensured without the installation of the newly inserted window frame is hindered.

Also, in this way, a two-step process is provided, according to which the channel-shaped recess in the masonry is initially provided with a sealing strip which is at least temporarily held in the partially compressed state and only after the insertion of the window frame expands against it.

In a first embodiment, the retaining elements comprise screws or nails which are anchored in the bottom or sidewalls of the recess after insertion of the sealing band into the recess through the sealing band, the heads of which exert the retaining function on the second layer of the sealing band. In this way, a secure, non-detachable connection between masonry and rigid layer of the sealing tape is made at a fixed distance.

In another preferred embodiment, the retaining elements comprise flat retaining strips which exert the retaining function on the second layer of the sealing tape. In this way, the sealing tape can be kept flat in a partially compressed state, without the insertion of the new window frame is hindered.

In a further development of this embodiment, the retaining elements also comprise screws or nails, which are anchored in the bottom or side walls of the recess after insertion of the sealing band into the recess through the sealing band, wherein the heads of the screws or nails from the second layer of the sealing tape slightly protrude. In addition, the flat retaining strips have in its central portion an opening and are arranged between the heads of the screws or the nails and the sealing strip, wherein the central portion of the flat retaining strips in the inserted state of the retaining strips from below rests against the heads of the screws or nails.

Thus, the retention function of the sealing band in the recess is ensured at the same time maintaining a predetermined extent of the sealing tape at several points, while after insertion of the new window frame, the flat retaining strips can be easily removed again and thus the sealing tape up against the window frame can expand.

For tailor-made Abstandswahrung two side portions of the flat retaining strips are in the inserted state of the retaining strips on the masonry on both sides of the recess.

In an alternative embodiment, the targeted release of the retention function is effected by pulling on at least one laterally projecting tension element, which exerts a force on the second layer.

In this case, the tension element is preferably firmly connected to the second layer of the sealing band, and it may be formed, for example, as a film-like pull tab.

The sealing function and handling of the sealing band is further improved by the fact that the second layer of the sealing band is formed from a rigid foam.

In an alternative or supplementary variant, the second layer of the sealing tape may have on both sides over the first layer of the sealing tape protruding clamping portions for clamping on the side walls of the recess. As a result, regardless of the shape and surface condition of the side walls of the recess, secure clamping of the sealing strip in the recess is ensured without the use of additional aids.

To improve handling, the first layer and the second layer of the sealing tape are preferably firmly connected to each other.

In order to improve the sealing properties and to make the sealing strip on the window frame used smoother, the sealing tape preferably has a third soft foam layer fixedly joined to the second layer of the sealing tape at the second layer opposite the first layer.

In order to ensure a secure sealing of the recess and a contour-related adaptation of the flexible foam even on uneven bottom of the recess, the first layer of the sealing tape in a specific embodiment, a plurality of three-dimensional foam segments, which by incisions, which differs from that of the second layer of the The sealing material segments extend in the expanded state of the first layer over at least 50% of its height, preferably at least 60% of its height, more preferably at least 70% of its height, more preferably at least 90% of their height.

To simplify the production and to form uniform foam segments, preferably a plurality of incisions extends substantially parallel to the side walls of the recess, and another plurality of incisions substantially perpendicular to the side walls of the recess, so that the foam segments have a rectangular basic shape , Alternatively, the incisions may extend obliquely to the side walls of the recess, so that the foam segments have a diamond-shaped basic shape. Other geometric shapes are conceivable, as well as the use of nubby foam.

Fig. 1

ist eine Querschnittsansicht einer kanalförmigen Ausnehmung in einem Mauerwerk eines Gebäudes;

Fig. 2a-2c

sind Querschnittsansichten des Mauerwerks aus Fig. 1, mit denen die aufeinanderfolgenden Schritte des Abdichtens bei der Fenstersanierung gemäß einer ersten Ausführungsform der Erfindung dargestellt sind;

Fig. 3

ist eine Querschnittsansicht des Mauerwerks aus Fig. 1 mit eingesetztem Fensterrahmen und einer alternativen Ausgestaltung der Abdichtung;

Fig. 4

ist eine Querschnittsansicht des Mauerwerks aus Fig. 1 mit eingesetztem Fensterrahmen und einer weiteren alternativen Ausgestaltung der Abdichtung;

Fig. 5

ist eine Querschnittsansicht des Mauerwerks aus Fig. 1 mit eingesetztem Fensterrahmen und einer weiteren alternativen Ausgestaltung der Abdichtung;

Fig. 6a-6c

sind Querschnittsansichten des Mauerwerks aus Fig. 1, mit denen die aufeinanderfolgenden Schritte des Abdichtens bei der Fenstersanierung gemäß einer weiteren Ausführungsform der Erfindung dargestellt sind;

Fig. 6d

ist eine Draufsicht auf eine Ausführungsform einer Halteleiste, wie sie beim Verfahren gemäß Fig. 6a-6c verwendet werden kann;

Fig. 7a

ist eine Querschnittsansicht des Mauerwerks aus Fig. 1 mit einer alternativen Rückhaltemöglichkeit für das Dichtband;

Fig. 7b

ist eine Perspektivansicht der in Fig. 7a verwendeten Halteclips;

Fig. 8

ist eine Perspektivansicht einer Mauerwerksöffnung, in die ein Fensterrahmen eingesetzt werden soll, mit einem in eine kanalförmige Ausnehmung eingesetzten Dichtband und einer Haltezarge zum Zurückhalten des Dichtbands in der Ausnehmung;

Fig. 9

ist eine Querschnittsansicht des Mauerwerks aus Fig. 1 mit einer weiteren alternativen Rückhaltemöglichkeit für das Dichtband;

Fig. 10

ist eine Querschnittsansicht des Mauerwerks aus Fig. 1 mit einer weiteren alternativen Rückhaltemöglichkeit für das Dichtband;

Fig. 11

ist eine Querschnittsansicht des Mauerwerks aus Fig. 1 mit einer weiteren alternativen Rückhaltemöglichkeit für das Dichtband;

Fig. 12

ist eine Querschnittsansicht des Mauerwerks aus Fig. 1 mit einer weiteren alternativen Rückhaltemöglichkeit für das Dichtband;

Fig. 13

ist eine Querschnittsansicht des Mauerwerks aus Fig. 1 mit einer weiteren alternativen Rückhaltemöglichkeit für das Dichtband;

Fig. 14

ist eine schematische Perspektivansicht einer bevorzugten Ausführungsform eines Dichtbands zum erfindungsgemäßen Einsatz bei der Fenstersanierung; und

Fig. 15

ist eine schematische Querschnittsansicht des Dichtbands aus Fig. 14 im Einbauzustand innerhalb einer abzudichtenden Ausnehmung.

Further features and advantages of the present invention will become apparent from the following description with reference to the drawings.

Fig. 1

is a cross-sectional view of a channel-shaped recess in a masonry of a building;

Fig. 2a-2c

are cross-sectional views of the masonry off Fig. 1 showing the successive steps of sealing in window renovation according to a first embodiment of the invention;

Fig. 3

is a cross-sectional view of the masonry Fig. 1 with inserted window frame and an alternative embodiment of the seal;

Fig. 4

is a cross-sectional view of the masonry Fig. 1 with inserted window frame and a further alternative embodiment of the seal;

Fig. 5

is a cross-sectional view of the masonry Fig. 1 with inserted window frame and a further alternative embodiment of the seal;

Fig. 6a-6c

are cross-sectional views of the masonry off Fig. 1 showing the successive steps of sealing in window renovation according to another embodiment of the invention;

Fig. 6d

is a plan view of an embodiment of a retaining strip, as in the method according to Fig. 6a-6c can be used;

Fig. 7a

is a cross-sectional view of the masonry Fig. 1 with an alternative retention option for the sealing tape;

Fig. 7b

is a perspective view of in Fig. 7a used retaining clips;

Fig. 8

is a perspective view of a masonry opening, in which a window frame is to be used, with a sealing strip inserted into a channel-shaped recess and a retaining frame for retaining the sealing strip in the recess;

Fig. 9

is a cross-sectional view of the masonry Fig. 1 with a further alternative retention option for the sealing tape;

Fig. 10

is a cross-sectional view of the masonry Fig. 1 with a further alternative retention option for the sealing tape;

Fig. 11

is a cross-sectional view of the masonry Fig. 1 with a further alternative retention option for the sealing tape;

Fig. 12

is a cross-sectional view of the masonry Fig. 1 with a further alternative retention option for the sealing tape;

Fig. 13

is a cross-sectional view of the masonry Fig. 1 with a further alternative retention option for the sealing tape;

Fig. 14

is a schematic perspective view of a preferred embodiment of a sealing tape for use according to the invention in the window renovation; and

Fig. 15

is a schematic cross-sectional view of the sealing tape off Fig. 14 in the installed state within a sealed recess.

In Fig. 1 a masonry 2 of a building is shown in which a recess 4 is located. The masonry 2 is formed in the illustrated example of a rough masonry 6 and attached plaster 8. The recess 4 is channel-shaped and has a bottom 10, two side walls 12 and an access section 14 open to the outside.

Usually arise such recesses 4 in masonry 2 during window replacement by old window frames are cut out with window saws from the masonry 2 and removed. When using aforementioned saws, the side walls 12 of the resulting recess 4 are usually relatively smooth, while the bottom 10 of the recess 4 can have considerable unevenness. It goes without saying that the recess 4 is formed circumferentially and in Fig. 1 represented cross-sectional view only one of up to four sides of the window opening in the masonry 2 represents.

Likewise, the masonry 2 on one side of the recess 4 may be offset in height from the masonry 2 on the other side of the recess 4 (not shown) and so e.g. form an outer stop for the window.

Now, a sealing band 16 is inserted into the recess, as in Fig. 2a is shown. The sealing strip 16 has a rectangular cross-section in the illustrated embodiment, but other shapes are conceivable. In principle, the sealing strip 16 can be produced both in strip form and as a sealing strip roll. Details of the sealing tape 16 will now be described with reference to FIG FIGS. 14 and 15 described.

The sealing strip 16 consists of a first layer 18 of a soft foam, which in the expanded state has a thickness of between 5 and 150 mm, preferably between 20 and 100 mm, and a width of between 10 and 250 mm, preferably between 40 and 100 mm.

The first layer 18 of the sealing tape may be formed of any open-cell or closed-cell flexible foam, for example of polyurethane or polyethylene, which resets after compression. The foam may be impregnated to delay recovery after compression. The density of such flexible foams is usually between 20 and 200 kg / m ³ .

On a lower side of the first layer 18 of the sealing tape, a thinner second, flexurally rigid layer 20 of the sealing tape is arranged. The second layer 20 is adhered to the first layer 18 by gluing or lamination. The thickness of the second layer 20 is between 1 and 10 mm, preferably between 2 and 5 mm.

As the material of the second layer 20, a foam is preferably provided which has a higher, preferably significantly higher flexural strength than the flexible foam of the first layer 18. For the rigid foam of the second layer 20, for example, plastics made of foamed polyethylene or polypropylene come into question. In particular, with a jamming of the sealing strip 16 in the recess 4 without additional fastening means (as in Fig. 2a to 2c shown) offers the rigid foam considerable advantages.

The material of the second layer 20 may otherwise also be a rigid fabric, a nonwoven or a grid. Also plastic strips are conceivable, or another material that is suitable for the stated purpose. Combinations of the above materials are possible.

It is also possible to divide the second layer 20 into two or more serially arranged sections that are not attached to each other. It is also possible for two subsections of the second layer 20 arranged next to one another to be arranged at a distance from one another so that the material of the first layer 18 can expand in the resulting gap and thus as a kind of "shock absorber" between the two subsections of the second Layer 20 is used.

The second layer 20 generally has a flexural strength greater than 200 kPa, preferably greater than 250 kPa. In a preferred embodiment, the second layer 20 has a flexural strength of greater than 300 kPa, preferably greater than 400 kPa. In a particularly preferred embodiment, the second layer 20 has a flexural strength of greater than 500 kPa, preferably greater than 1,000 kPa, and more preferably greater than 2,000 kPa. At the same time, the material of the second layer 20 must be elastic enough that it does not break during the use according to the invention. An upper limit for the flexural strength is therefore e.g. at 10,000 kPa.

In contrast, the foam material of the first layer 18 has a flexural strength of less than 150 kPa, preferably less than 125 kPa, more preferably less than 100 kPa, but in any case more than 0 kPa.

The bending strength of the material of the second layer 20 and the first layer 18 is determined in accordance with the standard ISO 1209-2, third edition from the year 2007. This international standard is commonly used to measure the flexural strength of plastics, but in a slightly modified form is also excellent for measuring the flexural strength of foams.

In this case, a uniformly changed force is applied in the middle between two supports perpendicular to a sample and thus bent through. The flexural strength is calculated from the measured force / deformation curve (see Chapter 3 of ISO 1209-2). The test device is in Chapter 4, Fig. 1 shown in more detail. An example of the test equipment used is the type BZ2.5 / TN1S from Zwick of Ulm, Germany. For example, the type KAP-Z for forces up to 200 N is used as a load cell.

The pads consist of two parallel cylindrical support elements arranged in the same horizontal plane, each of which has a radius of (15 +/- 1) mm. The length of the support elements is greater than the width of the samples and is in the present case 80 mm.

The distance L between the support elements differs from the ISO 1209-2 in the present measurement and is set to (85 +/- 2) mm. The power transmission element has the same shape as the support elements. The others in chapter 5.1 of ISO 1209-2 The specified sizes are changed for the specific purpose of the measurement of foams. Each measured foam sample is a cuboid with length I = (150 +/- 3) mm, width b = (40 +/- 2) mm and thickness d = (3.0 +/- 0.2) mm. Of the test conditions described in Chapter 6 of ISO 1209-2, the first one is used, ie a measurement at (23 +/- 2) ° C and (50 +/- 10)% relative humidity. Contrary to the velocity value of the movement of the force transmission element specified in Chapter 7 of ISO 1209-2, this is only moved downwards by (10 +/- 1) mm per minute. In addition, the force is measured up to a maximum bending of the foam of 20 mm and recorded during the measurement occurred maximum value F _{R of} the force.

The calculation of the bending strength R (in kPa) according to Chapter 8.1 of ISO 1209-2 thus results from the formula R = 1.5 F _R * L / bd ² * 10 ⁶ , where F _{R is} the maximum applied force in kN, L is the distance between the support elements in mm, b the width of the sample in mm and d the thickness of the sample in mm.

For the previously given values for L, b and d, the above-mentioned values result from the measured force F _R for the material of the second layer 20 and the first layer 18.

In Fig. 14 an embodiment of the sealing tape 16 is shown, which is particularly suitable for the use according to the invention. In adaptation to the desired application, the sealing strip 16 extends in its longitudinal direction (arrow B) further than in its transverse direction (arrow A), which simultaneously represents the functional direction of the sealing strip 16 and extends between the two side surfaces 22 of the first layer 18. In practice, the first layer 18 of the sealing tape is usually precompressed so that it can expand to about five to ten times its pre-compressed thickness, but often only about half of it is used to secure it on the masonry 2 and the window frame 24 ( Fig. 2c . Fig. 15 ) to ensure. The compression and expansion direction is indicated by arrow C.

The first layer 18 of the sealing tape may, as in Fig. 2a shown to be configured as a one-piece foam block.

For certain applications, it may be advantageous if the sealing band 16 has a plurality of foam segments 26, as in FIG Fig. 14 is shown. In the present case, these are arranged in rows and columns. The foam segments 26 are formed by incisions 28 or are separated from each other by the incisions 28.

All incisions 28 extend from an upper side 30 into the first layer 18 of the sealing band. The incisions 28 and thus the foam segments 26 extend in the expanded state of the first layer 18 of the sealing tape over at least 50% of its height, preferably up to at least 90% of its height. In this case, in the region of an underside of the first layer 18 of the sealing strip, a web 32 remain, which connects the foam segments 26 to each other. This web 32 is in Fig. 14 separated by a dotted line from the foam segments 26, but is in reality formed integrally therewith.

In the present case, the one incisions 28 extend substantially parallel to the side surfaces 22 of the first layer 18 of the sealing tape (and thus in the installed state Fig. 2a also parallel to the side walls 12 of the recess 4) and the other cuts 28 substantially perpendicular to the side surfaces 22 of the first layer 18 of the sealing tape (and thus in the installed state of Fig. 2a also perpendicular to the side walls 12 of the recess 4), resulting in a rectangular basic shape of the foam segments 26 and in plan view a checkerboard pattern of the foam segments 26 results. In this way, a plurality of foam segments 26, ie all but the foam segments 26 located at the edge of the sealing strip 16, are completely surrounded by other foam segments 26 in the longitudinal direction B and in the transverse direction A of the sealing strip 16.

In addition to the illustrated shape and direction of the incisions 28 many other embodiments are conceivable. Thus, the incisions 28, for example, obliquely or zigzag pass through the sealing strip 16, wavy or in any other, preferably regular design. Accordingly, the shape of the individual foam segments 26 may also differ from those in FIG Fig. 14 deviate shown cuboid shape. For example, a diamond-shaped basic shape of the foam segments 26 can arise. Also, the cuts 28 can be inclined from top to bottom. Almost every three-dimensional configuration of the foam segments 26 is conceivable.

The cuts 28 are usually extremely narrow and formed by displacement cuts through which no material loss occurs when cutting the cuts 28 in the soft foam of the first layer 18. Likewise, it is conceivable to produce the incisions 28 by punching out foam material from the first layer 18 of the sealing tape, if this should be advantageous for certain applications. As a rule, however, it is preferable to make the cuts 28 as narrow as possible and to lose as little material as possible when introducing the cuts 28 in order to leave the sealing effect of the sealing strip 16 as large as possible.

In Fig. 15 is the installation state of the sealing band 16 Fig. 14 shown schematically. It can be seen how even large unevenness of the masonry 2 from the sealing strip 16 due to the possibility of independent expansion of the individual foam segments 26 can be compensated and thus secure sealing and conditioning of the foam segments 26 at the bottom 10 of the recess 4 is ensured.

However, the incisions 28 can also run over the entire height of the first layer 18 of the sealing tape, so that the individual foam segments 26 are connected to each other only by the second layer 20.

How out Fig. 2a it can be seen, the sealing strip 16 is introduced with the first layer 18 ahead in the channel-shaped recess 4. In other words, the first layer 18 of the sealing tape is aligned in the direction of the bottom 10 of the recess 4. In the inserted state, the first layer 18 of the sealing tape is at least partially compressed. The upper side 30 of the first layer 18 of the sealing tape lies as fully as possible on the bottom 10 of the recess 4. In the illustrated example case, the width of the sealing band 16 corresponds approximately to the width of the recess 4, but it is also possible that the first layer of the sealing band 16 has a smaller width than the recess 4. It is also conceivable that the sealing strip 16 has a greater width than the recess 4 in a certain scope and is slightly compressed for insertion into the recess 4 in the width direction. In the illustrated example, the space between the two side walls 12 of the recess 4 is completely filled by the sealing strip 16.

The second layer 20 of the sealing tape has also been introduced in the variant shown here through the open access section 14 of the recess 4 and has jammed on the side walls 12 of the recess 4. This will, at least temporarily limits the extent of the partially compressed first layer 18 of the sealing band in the recess 4 in the direction of the open access section 14. In this respect, the jammed second layer 20 of the sealing tape keeps the first layer 18 at least temporarily from a further extent.

How out Fig. 2b can be seen, is still used during the at least temporary restriction of the expansion of the first layer 18 of the sealing strip of the window frame 24 in the region filled with the sealing strip 16 recess 4. Since new window frames 24 are usually slightly wider than old window frames, the new window frame 24 is slightly above the recess 4 on both sides. However, the invention is applicable even if this is not the case. The window frame 24 is usually used in such a way that on all sides of the masonry 2, a planned distance of at least 5 mm is maintained. The window frame 24 is aligned in the window opening and fixed in the masonry 2, for example by means not shown screws.

After a certain time, the jamming of the second layer 20 on the sidewalls 12 of the recess 4 yields to the expansion pressure of the first layer 18, so that the second layer 20 is slowly dragged along the sidewalls 12, so the sealing tape 16 continues to move in the direction of the window frame 24 expands and finally applies to the window frame 24. In this final installation state, the first layer 18 of the sealing tape still has a certain expansion force, so that a secure seal both in the direction of the window frame 24 and in the direction of the bottom 10 of the recess 4 is ensured. In addition, 16 further sealing elements 34 or sealants between window frame 24 and masonry 2 can be inserted or injected on one or both sides of the sealing tape. Alternatively, the still visible joint between masonry 2 and window frame 24 may be provided with a strip, e.g. made of plastic, to be covered.

In order to ensure a defined expansion of the sealing tape at the desired time, an angular, flat tool can be used, with which you drive between the side wall 12 of the recess 4 and the second layer 20 and then levered the second layer 20 at its edge upwards ,

In the in Fig. 3 illustrated variant, the sealing tape 16 is held from the beginning in the desired end position. This is achieved by using retention elements in the form of screws 36 or nails, which are anchored by the sealing band in the bottom 10 (or alternatively in the side walls 12) of the recess 4. When using screws 36, a corresponding bore 38 must first be generated for this purpose. This can preferably be done after insertion of the sealing tape 16 in the recess 4 by means of conventional drills. Subsequently, the screws 36 are screwed into the bore 38. The heads 40 of the screws 36 or nails define the maximum extent of the sealing band 16 by exerting a retention function on the second layer 20 of the sealing band. In other words, the sealing band 16 is prevented from further expansion by the heads 40 of the screws 36 or nails. The heads 40 of the screws 36 or nails are preferably countersunk heads, which penetrate into the second layer 20 of the sealing tape, so that a flat surface is achieved and the insertion of the window frame 24 is not hindered. The screws 36 or nails and thus the sealing strip 16 will protrude a small distance from the recess 4, so that in the inserted state of the window frame 24, a seal between the window frame 24 and sealing strip 16 results.

In Fig. 4 an alternative embodiment of the sealing tape 16 is shown, which can be combined with all other variants described here. In this embodiment, the second layer 20 of the sealing tape on two laterally over the first layer 18 of the sealing tape projecting clamping portions 42 for better clamping of the second layer 20 on the side walls 12 of the recess 4. This not only supports the clamping force of the second layer 20 in the recess 4 in the in Fig. 2a illustrated state, but also allows a system of sealing tape 16 at the edges of the window frame 24 in the final installed state, as in Fig. 4 is shown.

In Fig. 5 a further alternative embodiment of the sealing tape 16 is shown, which in turn can be combined with all other variants. In addition to the in Fig. 2a illustrated sealing tape 16, the sealing strip 16 in this case a third layer 44 of soft foam, which is connected to the first layer 18 opposite side of the second layer 20 fixed to the second layer 20 of the sealing tape, preferably in turn by means of gluing or lamination. The third layer 44 is relatively thin (preferably between 1 and 10 mm) and serves to better seal against the window frame 24th

In Fig. 6a-6d is shown a further preferred variant of the method according to the invention. First, the sealing tape 16 is inserted again into the recess 4. Then, as retaining elements, flat retaining strips 46 are placed over the open access section 14 of the recess 4 to exert the retaining function on the second layer 20 of the sealing tape and thus temporarily prevent the first layer 18 of the sealing tape from further expansion. The flat retaining strips 46 may be made of wood, metal or plastic, for example, and have a thickness of between 0.5 and 5 mm. In the illustrated example case, the flat retaining strips 46 after insertion of the sealing tape 16 in the recess 4 by means of screws 48 or nails in the bottom 10 of the recess 4 (or alternatively left and right of the recess near the side walls 12) anchored. When using screws 48, a hole 50 must be previously produced again in the masonry 2, wherein in a preferred embodiment, the sealing strip 16 already contains corresponding openings at this point. The screws 48 or nails are screwed so far into the bottom 10 of the recess 4 that they press with their heads 52 against the flat retaining strips 46 and two side portions 54 of the flat retaining strips 46 in the inserted state of the retaining strips 46 on the masonry 2 on both sides Rest recess 4. In this way, the flat retaining strips 46 cause a retention function on the second layer 20 of the sealing tape 16, which presses against the retaining strips 46. The flat retaining strips 46 can either be placed on the sealing strip 16 before the introduction of the screws 48 or nails, or they are locally inserted after screwing the screws 48 between the second layer 20 of the sealing strip and the heads 52 of the screws 48. When installed, therefore, the heads 52 of the screws 48 or nails slightly protruding from the second layer 20 of the sealing strip 16, by a distance which is defined by the thickness of the retaining strips 46.

In Fig. 6d an exemplary embodiment of a retaining strip 46 is shown. The middle section 56, which is located between the two side sections 54, serves in the inserted state of the retaining strips 46 to abut from below on the heads 52 of the screws 48 or nails. In the preferred embodiment shown here, the flat retaining strips 46 in its central portion 56 an opening 58 which serves to receive the shank of the screws 48 or nails. Preferably, the opening 58 is open to the side and widens outwardly. In this way, the retaining strips 46 can easily after inserting the window frame 24 (see Fig. 6b ) are released by lateral displacement of the screws 48 and thus removed from the window construction. By removing the retaining strips 46, the retention function on the expansion band 16 of the sealing band 16 results in a contact of the sealing band 16 on the window frame 24. It is important that the heads 52 of the screws 48 or nails can sink into the sealing band 16 or the sealing band 16 itself around the heads 52 of the screws 48 or nails around in the direction of window frame 24 can expand. This is made possible, in particular, when prefabricated passages are contained in the sealing band 16 which are at least as large as the heads 52 of the screws 48. Likewise, heads 52 of the screws 48 may be used, which have the same diameter as the shank of the screws 48, but are separated from the shank by a notch. In this case, the retaining strips 46 would hook into the notch. Many other modifications will become apparent to those skilled in the art.

In particular, the number and shape of the retaining strips 46 can be varied in many ways. The distances between individual retaining strips 46 depend on the expansion force of the sealing strip 16 and can be varied.

In Fig. 7a and 7b is another possibility of provisional fixation of the sealing tape 16 shown in the recess 4. For this purpose retaining clips 60 are used as retaining elements, which in Fig. 7b are shown in more detail. The retaining clips 60 may be configured, for example T-shaped and inserted with its shaft 62 in a gap between the sealing band 16 and side wall 12 of the recess 4, while the head portion 64 bears against the second layer 20 of the sealing tape and the adjacent masonry 2 and thus exerting a retention function on the second layer 20 of the sealing band. For better anchoring of the shaft 62 on the side walls 12 of the recess 4 and the sealing strip 16 barbs 66 may be disposed on the shaft 62 and project laterally from this.

The release of the retaining function takes place here for example by tearing off the head portions 64 or by turning the head portions 64 by 90 ° degrees such that the head portions 64 align parallel to the gap between the sealing band 16 and side wall 12 of the recess 4 and an expansion of the sealing band 16 is no longer get in the way.

Many other embodiments of retaining clips 60 are conceivable. These can also be firmly connected to the masonry 2, for example, be screwed, the entire Cover sealing tape 16, etc.

In Fig. 8 a further embodiment of serving as a retaining elements flat retaining strip 46 is shown. This is configured as a full-surface part of a retaining frame, which is inserted before insertion of the window frame 24 as a whole or as individual segments to be connected in the window opening and the retention of the sealing tape 16 in the recess 4 is used. In this case, it is advantageous if the retaining frame has at least two opposing retaining strips 46, which are connected to one another by means of transverse struts 66. Preferably, these transverse struts 66 are adjustable in length, in order to be able to be adapted to different sizes of window openings. After insertion of the window frame 24, the retaining frame can be removed again, and the sealing strip 16 will expand against the inserted window frame 24 and seal it.

As a rule, at least three tie-bar-like connected retaining strips 46 will be required in the retaining frame in order to cover the left, right and upper sides of the window opening.

In Fig. 9 is another alternative way for the provisional retention of the expansion of the sealing tape 16 and the targeted triggering of time the expansion of the first layer 18 of the sealing tape 16 is shown. The embodiment of the sealing band 16 in this case essentially corresponds to the embodiment Fig. 2a and the temporary attachment of the sealing tape 16 in the recess 4 by means of jamming of the second layer 20 on the side walls 12. For targeted release of the deadlock at least one laterally projecting tension element is provided here in the form of a film-like pull tab 66, which has a force on the second layer 20 in the direction of the open access portion 14 exerts. In the illustrated example, two pull tabs 66 are provided, but it may also be only one pull tab 66 on one side.

The pull tab 66 is fixedly connected to the second layer 20 of the sealing tape 16, preferably by gluing or by lamination. In the illustrated example case, the pull tab 66 is guided laterally under the second layer 20 and fastened there at a lower edge region. Likewise, the pull tab 66 may be attached laterally on top of the second layer 20.

The targeted release of the retention function is now achieved by pulling on the at least one pull tab 66, whereby a portion of the second layer 20 or the entire second layer 20 is raised in the direction of the open access section 14. Thus, the jamming of the second layer 20 on the side walls 12 of the recess 4 is released and the expansion effort of the first layer 18 of the sealing tape 16 is no longer or at least not significantly restrained.

The term "film-like" includes, for example, all tear-resistant sheet materials, mesh fabrics, laminated sheets consisting of a plastic film laminated with a backing material (e.g., non-woven), or fabric-reinforced sheets. Combinations of these materials are possible.

In case of Fig. 9 in that two pull tabs 66 are attached to opposite sides of the sealing band 16, is preferably pulled at both pull tabs 66 simultaneously in the opposite direction as indicated by the arrows to lift the second layer 20 in the direction of the open access portion 14.

When the pull tab 66 is secured to the top of the second layer 20, it is advantageously integrally formed with two mutually projecting pull sections which can be simultaneously pulled in the opposite direction to lift the second layer 20 toward the open access section 14.

Fig. 10 illustrates a variation of the embodiment Fig. 9 Again, a pull tab 66 is provided as a pulling element, which is fastened on top of the second layer 20. However, the second layer 20 is here designed in two parts with a breakthrough between the two sections. The attachment of the pull tab 66 takes place on the right and left of the opening. Optionally, an adhesive tape 68 may still be secured over the opening on the opposite side of the second layer 20. Preferably, the pull tab 66 is led out here to form a U-shape to one side of the recess 4. By pulling on the pull tab 66, the middle part of the second layer 20 is raised in the direction of the access section 14, so that the two sections of the second layer 20 form a pointed roof shape and the jamming of the second layer 20 on the side walls 12 of the recess 4 is released. The adhesive tape 68 can serve for the cohesion of the two sections of the second layer 20.

The pull tab 66 may in the embodiments according to Fig. 9 and 10 a continuous in the longitudinal direction of the recess 4 ausgestaltetes element, but it can also be arranged a plurality of narrow tension elements at certain intervals in the longitudinal direction of the recess 4. In this case, for example, strings of tear-resistant material can be used as tension elements.

Fig. 11 shows a further alternative possibility for the provisional retention of the expansion of the sealing band 16 and the targeted triggering of time of the expansion of the first layer 18 of the sealing tape 16. Also in this example, the second layer 20 is clamped to the side walls 12 of the recess 4. However, the second layer 20 has a narrow edge portion 70, which is connected by means of a perforation 72 or a thin layer separable with the rest of the second layer 20. On a longitudinal side of the recess 4, this edge portion 70 project beyond the sealing strip 16 and thus serve this extension as a tensile section. By pulling on the edge portion 70, the edge portion 70 is separated at the perforation 72 or thin spot from the rest of the second layer 20 and thus the jamming of the second layer 20 on the side walls 12 of the recess 4 is released.

Fig. 12 shows an embodiment of the embodiment of Fig. 9 similar. However, the tension element is configured here as an integral, in the longitudinal direction of the recess 4 extending film web 74, which is inserted before insertion of the sealing tape 16 in the recess 4, wherein on both sides of the recess 4 tensile portions of the film web 74 protrude. In this case, the jamming of the second layer 20 on the side walls 12 of the recess 4 does not take place directly, but with the interposition of the film web 74th

For targeted release of the deadlock is now pulled at both Zugabschnitten the film web 74 simultaneously in the opposite direction. As a result, the first layer 18 of the sealing tape 16 is compressed and finally the second layer 20 is raised in the direction of the open access section 14. After removal of the film web 74 by pulling it out laterally, the first layer 18 of the sealing tape 16 can again expand unimpeded in the direction of the bottom 10 of the recess 4.

For the film web 74 are the same materials in question as for the pull tab 66. Again, instead of the film web 74 several narrow tension elements in certain Distances may be arranged in the longitudinal direction of the recess 4, which may be configured for example as cords.

Fig. 13 shows a further alternative possibility for provisionally retaining the expansion of the sealing band 16 and for selectively triggering the expansion of the first layer 18 of the sealing band 16. Here, the second layer 20 is less wide than the recess 4, and jamming of the second layer 20 in the Recess 4, a clamping aid 76 is provided in the region of at least one side surface 22 of the second layer 20, which bridges the gap between the second layer 20 and side wall 12. The clamping aid 76 may be formed as a rolled sealing strip, for example made of foamed plastic, as shown, but it is also possible to use all possible other releasable clamping structures with different shapes and made of different materials.

In the illustrated example case, this is unrolled by pulling on a side of the recess 4 protruding tab of the clamping aid 76 and finally pulled out of the recess 4, whereby the jamming of the second layer 20 is dissolved in the recess 4 and the first layer 18 can expand.

There are still some other embodiments of the method according to the invention conceivable. It is always important that the sealing strip 16 is inserted into the channel-shaped recess 4 of the masonry 2 and there either by direct or indirect clamping of the second layer 20 on the side walls 12 of the recess 4 or by means of a plurality of retaining elements, of which some examples have been described and which exert a retaining function on the second layer 20 of the sealing band, effecting an at least temporary restriction of the extent of the first layer 18 of the sealing band in the recess 4, before the window frame 24 is inserted in the region of the recess 4 filled with the sealing band 16.

In addition to the window renovation, the method according to the invention can also be used for the sealing of other channel-shaped recesses 4 in the masonry 2.

In addition to the said retaining elements, there are other possibilities, such as the use of retaining clips (shooting technique), a chemical fixation of the sealing tape 16 in the recess 4, etc. In addition, the sealing tape can still have more than said layers.

It is also possible for a plurality of first layers 18 to be arranged next to one another on a second layer 20. In this case, the plurality of first layers 18 may be arranged adjacent to one another or spaced from one another. The plurality of first layers may be made of the same or different material. The latter can for example provide advantages in terms of the different desired air permeability or vapor diffusion differences in the interior and exterior of the masonry ("inside denser than outside").

Finally, the second layer 20 may have a longitudinal profiling on the edge, somewhat wavy, zigzag or other geometric shapes. On the one hand, this can make the jamming of the second layer 20 on the side walls 12 of the recess 4 more precisely adjustable and, on the other hand, reduce the resistance of the second layer 18 when inserting the sealing strip 16 into the recess 4.

Likewise, the second layer 20 can be provided with longitudinal, diagonal or cross-sections for increasing the elasticity in regions, for width adjustment and for regulating the transverse tension.

Claims (14)

1. A method for providing a seal in window renovation with the following steps:

   - provision of a sealing strip (16), which provides a first layer (18) made from a soft foam material self-restoring after compression and a second layer (20) made from a material resistant to bending;

   - insertion of the sealing strip (16) into a channel-shaped recess (4) of a wall (2) which is limited by a base (10) and two side walls (12) and provides an open access portion (14), wherein the first layer (18) of the sealing strip (16) is orientated in the direction towards the base (10) of the recess (4) and is at least partially compressed in the inserted condition;

   characterised by

   - at least temporary restriction of the expansion of the first layer (18) of the sealing strip (16) by clamping the second layer (20) directly to the side walls (12) of the recess (4) or indirectly to the side walls (12) of the recess (4) with the interposition of an auxiliary clamping element (76), or at least temporary restriction of the expansion of the first layer (18) of the sealing strip (16) by means of several retaining elements (36, 46, 48, 60) which exert a retaining function on the second layer (20) of the sealing strip (16),

   and in that, during the at least temporary restriction of the expansion of the first layer (18) of the sealing strip (16), a window frame (24) is inserted in the region of the recess (4) filled with the sealing strip (16).
2. The method according to claim 1,
   characterised in that
   the retaining elements (36, 46, 48, 60) comprise screws (36) or nails, which, after the insertion of the sealing strip (16), are anchored within the recess (4) into the base (10) or the side walls (12) of the recess (4) through the sealing strip (16), wherein their heads (40) exert the retaining function on the second layer (20) of the sealing strip (16).
3. The method according to claim 1,
   characterised in that
   the retaining elements (36, 46, 48, 60) comprise flat holding strips (46), which exert the retaining function on the second layer (20) of the sealing strip (16).
4. The method according to claim 3,
   characterised in that
   the retaining elements (36, 46, 48, 60) further comprise screws (48) or nails, which, after the insertion of the sealing strip (16) into the recess (4), are anchored in the base (10) or the side walls (12) of the recess (4) through the sealing strip (16),
   wherein the heads (52) of the screws (48) or nails project slightly from the second layer (20) of the sealing strip (16), and that the flat holding strips (46) provide an opening (58) in their middle portion (56) and are arranged between the heads (52) of the screws (48) or the nails and the sealing strip (16),
   wherein, in the inserted condition of the holding strips (46), the middle portion (56) of the flat holding strips (46) contacts the heads (52) of the screws (48) or of the nails from below.
5. The method according to claim 4,
   characterised in that,
   in the inserted condition of the holding strips (46), two lateral portions (54) of the flat holding strips (46) are supported on the wall (2) at both sides of the recess (4).
6. The method according to claim 1,
   characterised in that,
   after the step of inserting the window frame (24), the further step of releasing the retaining function is implemented.
7. The method according to claim 6,
   characterised in that
   the release of the retaining function is achieved by pulling on at least one laterally projecting pulling element (66, 74) which exerts a force on the second layer (20).
8. The method according to claim 7,
   characterised in that
   the pulling element (66) is rigidly connected to the second layer (20) of the sealing strip (16).
9. The method according to claim 8,
   characterised in that
   the pulling element is embodied as a foil-like pull-off tab (66).
10. The method according to claim 6,
    characterised in that
    the release of the retaining function is achieved by removing the holding strips (46).
11. The method according to any one of the preceding claims,
    characterised in that
    the second layer (20) of the sealing strip (16) is formed from a foam material resistant to bending.
12. The method according to any one of the preceding claims,
    characterised in that
    the second layer (20) of the sealing strip (16) provides two clamping portions (42) projecting laterally beyond the first layer (18) of the sealing strip (16) for clamping to the side walls (12) of the recess (4).
13. The method according to any one of the preceding claims,
    characterised in that
    the first layer (18) and the second layer (20) of the sealing strip (16) are connected rigidly to one another.
14. The method according to any one of the preceding claims,
    characterised in that
    the sealing strip (16) provides a third layer (44) made from a soft foam material which is rigidly connected to the second layer (20) of the sealing strip (16) on the side of the second layer (20) disposed opposite to the first layer (18).

Images