EP1857606A2 - Mortar screed for attaching to the lower edge of building insulation - Google Patents

Abstract

The screed (2) has a shank (4) provided for swapping a part of the lower surface of the heat insulation. The other shank (6) is provided for swapping a part of the outer side of the heat insulation. An insertion area (8) is protruding away from the facing side of the other shank of the heat insulation which is determined to limit insertion in an insertion groove in the outer side of the heat insulation or which is so formed that it is inserted from the outer side of heat insulation into the material of the heat insulation. An independent claim is also included for a hand tool has a guiding area.

Description

• einen ersten Schenkel, der zum Überlagern mindestens eines Teils der Unterseite der Wärmedämmung bestimmt ist;
• einen zweiten Schenkel, der zum Überlagern eines Teils der Außenseite der Wärmedämmung bestimmt ist;
• und einen Einsteckbereich, der von der der Wärmedämmung zugewandten Seite des zweiten Schenkels wegragt und der
  • entweder zum engen Einstecken in eine Einstecknut in der Außenseite der Wärmedämmung bestimmt ist,
  • oder derart ausgebildet ist, dass er von der Außenseite der Wärmedämmung her in das Material der Wärmedämmung hinein einsteckbar ist. °

The invention relates to a cleaning strip for attachment to a thermal insulation of a building in the region of the transition between the underside and the outer side, comprising:

• a first leg intended to overlie at least a portion of the underside of the thermal insulation;
• a second leg intended to overlie a portion of the outside of the thermal insulation;
• and a Einsteckbereich which protrudes from the heat insulation facing side of the second leg and the
  • intended either for tight insertion into a male groove in the outside of the thermal insulation,
  • or is designed such that it can be inserted into the material of the thermal insulation from the outside of the thermal insulation forth. °

So far, you have the lower end of the building thermal insulation by default with a so-called base rail made of sheet metal. The base rail was angular in cross-section and was attached with its narrower leg on the wall of the house. The wider leg was used to support the underside of the insulation. In addition, we know base rails, which are bent at the outer end again upwards and there include the outside of the insulation for a lower edge region. Although the known base rails represent a mechanically sound solution for the lower heat insulation completion, but form a cold bridge from the outside of the insulation to the house wall.

The invention has for its object to provide a way to design the lower end of the thermal insulation of a building, which is less expensive and has significantly reduced cold bridge effect or virtually no cold bridge effect.

When using the cleaning strip according to the invention is dispensed with the conventional, metallic socket rail. If you even provide mechanical supports for the underside of the insulation (and it does not leave in the anyway required attachment of the lower row of thermal insulation elements on the building wall), then you can work with a number of wall mounted, protruding from this holder , which are positioned for example at a mutual distance of 40 to 70 cm. The holders can be made of metal or plastic. Even in the case of metal holders, thermal bridging is only a small fraction compared to a longitudinally continuous socket rail.

The thermal insulation is usually made of plate-like thermal insulation elements, in particular made of foamed polystyrene or fiber material, which has been made dimensionally stable by a binder.

Because of the "tight insertion into a Einstecknut" or the "insertion into the material of the insulation inside" results on the other hand, a resistance against unintentional moving away of the first thigh and thus the cleaning strip from the outside of the insulation after insertion.

It should be borne in mind in the above-mentioned specifications that a fixing mechanism is preferably additionally provided on the first leg (see below) and that in most cases the setting mechanism plays the role of the fixation mechanism only in the phase after the initial attachment of the cleaning strip to the thermal insulation single fixing mechanism. As a rule, the cleaning strip is intensively connected to the thermal insulation in a later phase by means of applied plaster.

The second variant of the invention with "plugging into the material of the thermal insulation into it" (whereby the plug-in area virtually frees itself the insertion path) has the advantage that it is not necessary to create an insertion path in the thermal insulation beforehand. In the second variant of the invention, it is preferable form the insertion region in the form of a series of individual plug-in projections. This facilitates insertion and increases resistance to re-extraction. The last-mentioned resistance can be further increased in the invention in that it equips the Einsteckvorsprünge (not necessarily all of them) with barb-like function; This works especially well with thermal insulation elements made of fiber material.

Preferably, the first leg is configured to define its mounting position in relation to the underside of the thermal insulation. This is preferably a determination against solution movement of the cleaning strip in the direction of the outside of the thermal insulation away (ie a release movement in the plane of the bottom of the insulation), because indeed release movement of the cleaning strip is positively excluded from top to bottom by the insertion.

A simple, first way to fix the first leg is an adhesive tape on its top. There are adhesives that give a good adhesion with foamed polystyrene, z. B. hot melt adhesive. When attaching the cleaning strip to the insulation is then best done so that the plaster strip applies while from below with the first leg against the underside of the insulation and then pushes the cleaning strip with the second leg to the outside of the insulation, until the insertion is brought into the insertion position, but z. B. the more distant from the apex of the cleaning strip area of the first leg a little from the bottom of the insulation bends away, only when the second leg and the insertion are in the final position, by pressing up the first leg, the bond with the To perform underside of the thermal insulation.

In addition, it is possible to provide an adhesive tape on the side facing the thermal insulation side of the second leg.

Another preferred possibility is that the first leg for tight insertion into a gap between the insulation from below supporting holder (eg a holder from the row of holders mentioned earlier) and the underside of the thermal insulation is determined. Here you can even provide for a positive component of the definition by z. B. equips the underside of the first leg with running in the longitudinal direction of the cleaning strip grooves and provides on the holder an upwardly projecting projection which fits into one of these grooves, which is located in the appropriate position. It is sufficient if this projection of the holder in question only slightly protrudes upwards, z. B. 0.3 to 0.7 mm. It is emphasized that the doctrine given in the first sentence of this paragraph can also be realized in a technically meaningful sense without the feature "plug-in area" of the first paragraph of the description. This represents a separate invention.

A further preferred possibility is that the first leg is intended for tight insertion into a gap between the underside of the thermal insulation and the top of a further thermal insulation of the building, which adjoins the first mentioned heat insulation below. Today, it is more and more common for the (relatively thick) thermal insulation of the building wall to be connected to a (further) thermal insulation applied to the lower part of the wall of the building. This further thermal insulation is called perimeter insulation and is generally much thinner than the thermal insulation of the actual building wall. The perimeter insulation consists z. B. extruded polystyrene. The perimeter insulation is typically used to insulate the exterior of the basement walls of the building, with the perimeter insulation extending typically 15 to 40 cm above the level of the top of the earth. Combination of plugging in the gap between the building wall insulation and the Perimeterdämmung with insertion into the gap between the holder and the bottom of the thermal insulation is possible, because yes in the space between the holders of the first leg of the cleaning strip comfortably in the gap between the two thermal insulation can be pushed.

Preferably, a Armierungsgewebeabschnitt is attached to the first leg and / or the second leg of the cleaning strip. The Armierungsgewebeabschnitt is, typically with putty, attached to the underside or the outside of the heat insulation, where in many cases further reinforcing fabric overlapping and attached to the relevant side of the thermal insulation by putty. Later, the Armierungsgewebeabschnitt or the subsequent reinforcing fabric are plastered over. The Armierungsgewebeabschnitt or reinforcing fabric improve the adhesion of the plaster to the insulation and ensure a permanent crack-free maintenance of the plaster. An Armierungsgewebeabschnitt on the first leg is only useful if it is to be applied plaster on the underside of the insulation. This is not always the case, especially if the first leg completely covers the entire thickness difference between the building wall thermal insulation and the perimeter insulation.

Preferably, the first leg at a distance from the apex of the cleaning strip on a lower, longitudinal projection which can be used as a plaster boundary. This allows a more convenient plaster application in this area, as if one would apply plaster to the area of the top of the cleaning strip. Preferably, the plasterable part of the cleaning strip can be bent at a weakening zone next to the projection by 90 ° so that he z. B. lying vertically on the perimeter insulation. The possibility of breaking off said part by kinking is also preferred.

Preferably, a water nose is provided in the region of the apex of the cleaning strip. By means of the water nose water, which runs down the plaster on the outside of the heat insulation, a piece further down than the bottom of the first leg and there drained from a relatively narrow longitudinal edge of the cleaning strip. In this way, with the running water transported dirt no longer reaches adjacent building areas, especially the lower limit of thermal insulation.

The water nose can be made of transparent plastic, so that it is optically less conspicuous - since it is typically not covered with plaster on the outside. The transparent Wassernasenbereich can be prepared in particular by co-extrusion with the rest of the cleaning strip. But it is also possible to produce the transparent water nose as a separate part and to attach to the rest of the cleaning strip, in particular by welding or non-positive connection or positive connection, the latter preferably in the form of a snap connection.

As already mentioned above, the cleaning strip is preferably designed such that in the finished state of the building, the second leg is substantially embedded in plaster. The - in particular for the phase before the application of the plaster - significant determination of the cleaning strip on the insulation by means of the insertion and possibly also by means of its definition serving training of the first leg, do not exclude that other means for fixing the cleaning strip to the insulation are used, in particular filler, which is applied prior to pressing the cleaning strip to the thermal insulation on the cleaning strip and / or on the corresponding areas of thermal insulation.

It should be emphasized that the invention may alternatively be claimed with claims of the formulation pattern "thermal insulation building to which a screed ... (formed as disclosed in the application)" is attached.

Another object of the invention is a hand tool, as specified in the original claim 12. The hand tool preferably has a contact area for the outside of the thermal insulation.

Fig. 1

eine Putzleiste, quer geschnitten und in perspektivischer Darstellung;

Fig. 2

die Putzleiste von Fig. 1, angebracht an einer Wärmedämmung und im Fertigzustand des Gebäudes, in einem vertikalen Schnitt;

Fig. 3

ein zweites Ausführungsbeispiel einer Putzleiste in Draufsicht von oben, wobei man im wesentlichen nur den Einsteckbereich sieht;

Fig. 4

ein drittes Ausführungsbeispiel einer Putzleiste in Draufsicht von oben, wobei man im wesentlichen nur den Einsteckbereich sieht;

Fig. 5

eine Wärmedämmung im vertikalen Schnitt (wie in Fig. 2), wobei ein Halter aus einer Reihe von beabstandeten Haltern zu sehen ist, und zwar im Zustand vor Anbringung der Putzleiste;

Fig. 6

ein viertes Ausführungsbeispiel einer Putzleiste im Querschnitt, kombiniert mit Wärmedämmung und Halter gemäß Fig. 5;

Fig. 7

ein fünftes Ausführungsbeispiel einer Putzleiste im Querschnitt;

Fig. 8

ein Handwerkzeug zum Erzeugen einer Einstecknut in einer Wärmedämmung an der Baustelle, in perspektivischer Darstellung.

The invention and preferred features of the invention will be explained in more detail with reference to exemplary embodiments illustrated in the drawings. It shows:

Fig. 1

a cleaning strip, cut across and in perspective view;

Fig. 2

the cleaning strip of Figure 1, attached to a thermal insulation and in the finished state of the building, in a vertical section.

Fig. 3

a second embodiment of a cleaning strip in plan view from above, wherein one sees only the insertion area substantially;

Fig. 4

a third embodiment of a cleaning strip in plan view from above, wherein one sees only the insertion area substantially;

Fig. 5

a thermal insulation in vertical section (as in Fig. 2), wherein a holder of a series of spaced holders can be seen, in the state before attachment of the cleaning strip;

Fig. 6

a fourth embodiment of a cleaning strip in cross section, combined with thermal insulation and holder of FIG. 5;

Fig. 7

a fifth embodiment of a cleaning strip in cross section;

Fig. 8

a hand tool for generating a Einstecknut in a thermal insulation at the construction site, in perspective view.

In all drawing figures, the same or analogous parts are provided with the same reference numerals.

In Fig. 1, a cleaning strip 2 is drawn, which - very roughly speaking an angular cross-sectional shape with in addition to be described below insertion region. The cleaning strip 2 has as its essential components a first leg 4 (which is normally substantially horizontal when installed), a second leg 6 (which is normally substantially vertical when installed), an insertion area 8 parallel to the first one Leg 4 extends and protrudes in the same direction as the first leg 4 of the second leg 6, a projecting as a water nose 10 down the projection in the region of the apex, where the first leg 4 and the second leg 6 converge, and with the help of Welding strands 11 on the second leg 6 fixed Armungsgewebeabschnitt 12. The Armierungsgewebeabschnitt 12 typically consists of a grid-shaped arrangement of plastic-wrapped Glass fiber strands. The second leg has openings 14 for the passage of putty and / or plaster.

FIG. 2 illustrates this situation when the cleaning strip 2 of FIG. 1 is attached to a thermal insulation 16 of a building in the region of the transition between the underside 18 of the thermal insulation 16 and the outside 20 of the thermal insulation 16. In Fig. 2 shows a building wall 22 z. B. masonry or concrete. On the outside of the building wall 22, the thermal insulation 16 is attached, typically constructed of plate-shaped thermal insulation elements, in particular made of foamed polystyrene or made of binder with dimensionally stable fiber material. For attachment of the thermal insulation elements partially applied adhesive mass 24, additionally or alternatively not shown, the insulation 16 penetrating, poorly heat conductive stud provided.

Down to the thermal insulation 16 of the building wall 22 is followed by another insulation, the so-called perimeter insulation 26, which is attached in a similar manner to a lower portion of the building wall 22. The perimeter insulation 26 typically ends up 15 to 40 cm above the level of the soil surface on the building; it typically extends downwards for the entire height of the basement wall of the building. Between the top 28 of the perimeter insulation 26 and the bottom 18 of the thermal insulation 16 there is a horizontally extending gap 30 which typically has a vertically measured dimension of about 1 mm or less.

After the perimeter insulation 26 and at least the lowermost row of thermal insulation elements of the thermal insulation 16 have been attached to the building wall 22, the cleaning strip 2 is attached from the left in FIG. The cleaning strip 2 is inserted with the free end 32 of its first leg 4 starting in the gap 30 between the Perimeterdämmung 26 and the insulation 16 and then approximated in the horizontal direction with its second leg 6 more and more outside 20 of the insulation 16. At a certain distance from the bottom 18 a horizontally extending Einstecknut 34 is incorporated into the outer side 20 of the insulation 16, z. B. by a simple hand tool that works like a small saw and a maintains constant distance between the bottom 18 and the insertion 34. The Einstecknut 34 has a vertically measured width, typically 1 mm, which is less than the material thickness of the Einsteckbereichs 8 so that it sits after insertion into the Einstecknut 34 with bias therein.

In the course of the completion of the building, the second leg 6 of the plaster strip 2, together with the Armierungsgewebeabschnitts 22 and not shown, overlapping subsequent reinforcing fabric in plaster 36 is embedded. On the outside of the perimeter insulation 26 is also a plaster layer 38 (base plaster).

In Fig. 1 was also a connecting pin 40 with a central, circumferential collar 42 can be seen. The cleaning strip 2 is supplied in a length of typically 1 to 2.5 m. At the transition between two adjacently installed cleaning strip lengths, a pin 40 is inserted in the manner illustrated in order to align the two adjacent cleaning strip lengths in alignment with each other. Such pins 40 can also be used as (temporary) fixing pins for the cleaning strip 2 of the thermal insulation.

It is possible to work without a previously incorporated Einstecknut 34. The insertion region 8 in the embodiment shown in FIG. 1 can easily be pushed into an unprepared thermal insulation element in view of a material thickness of typically somewhat less than 1 mm. However, such a pushing-in is made easier if the insertion area 8 is more strongly dissolved into individual insertion projections 44, for example as shown in FIGS. 3 and 4. The drawn tapering of the Einsteckvorsprünge 44 at the front end is favorable for easier insertion. FIG. 4 illustrates an embodiment in which the flanks of the plug-in projections 44 are formed with barb-like path spreading regions 48. When inserting the Wegspreizbereiche put 48 - almost, but not completely aware - to the relevant insertion projection 44 at. For forces, however, which act in the direction re-withdrawal of the insertion region 8 from the relevant thermal insulation element, the Wegspreizbereiche 48 are pulled outwards and oppose the re-extraction.

The shaping of the insertion projections 44 can not naturally take place during an extrusion process. In a subsequent production step, this training is generated either by a punch-like process or by a Ausschneidvorgang with a rotating tool.

In Fig. 5, an embodiment is shown, in which the thermal insulation 16, in addition to the adhesive 24, by spaced along the wall 22 of the holder 50 is supported from below. The drawn holder is - measured at right angles to the plane of the drawing of FIG. 5 - only z. B. 5 to 30 mm wide and is made of metal or - because of lower thermal conductivity - made of plastic. The drawn holder 50 is less long than the thermal insulation 16 is thick. In its one end region of the holder 50 is angled upright at right angles, and there it is attached to the wall 22 of the house. At the remote from the house wall 22, the free end of the holder 50 has a small projection 52 which z. B. 0.3 to 0.7 mm above the remainder of the top of the holder 50 protrudes.

While Fig. 5 shows the situation after attachment of the holder 50 to the building wall 22 and after attachment of the lowermost row of thermal insulation elements, the later state after attachment of the cleaning strip 2 is drawn in Fig. 6. The cleaning strip 2 is formed as illustrated by FIGS. 1 to 4, but with the difference that the first leg 4 has on its underside a series of spaced grooves 54 which extend in the longitudinal direction of the cleaning strip 2. When the first leg 4 of the cleaning strip 2 between the holder 50 and the bottom 18 of the insulation 16 is inserted so far that the projection 52 of the holder 50 just snaps into a groove 54, thereby a positive fixing of the cleaning bar 2 against re-extraction reached. Although this form-fitting definition does not withstand greater forces (which on the other hand is advantageous for a comfortable insertion of the first leg 4), but is completely sufficient for the desired effects here.

In the embodiment of FIG. 7, the cleaning strip 2 has at the bottom of the first leg 4 a along the cleaning strip 2 extending, downwardly projecting projection 56, which is spaced from the vertex of the cleaning strip 2, where the first leg 4 and the second leg 6 converge is located. In Fig. 7 to the right of the projection 56, a Armierungsgewebeabschnitt 58 is attached to the first leg 4. Such a trained cleaning strip 2 is advantageous if there is no perimeter insulation 26 below the thermal insulation 16. In this case, the area between the projection 56 and the house wall 22 can be plastered optimally. It is emphasized that one can also work with Armierungsgewebeabschnitt 58 but without projection 56; In this case, the plastering strip 2 is even plastered to the apex area, as drawn in Fig. 2 for the second leg 6. Several grooves 60 side by side as weakening zones are shown.

Preferred materials for the cleaning strip 2 with its first leg 4, its second leg 6, its insertion region 8 and the water nose 10 are polyvinyl chloride (PVC), polystyrene (PS) and polypropylene (PP). If the water nose 10 is made of transparent plastic, in particular polycarbonate (PC), polymethyl methacrylate (PMMA), silicone elastomer and transparent PVC are considered.

In Fig. 8, a simple hand tool for generating a Einstecknut is drawn in a thermal insulation at the construction site, which is preferably made of plastic. The hand tool 62 has a gripping area or detention area 64, a guide area 66, an abutment area 68, and a saw area 70. To produce an insertion groove 34 (see FIG. 2), the hand tool 62 is pressed from below with its first guide area 66 against the underside 18 of the insulation 16 laid. Then, the hand tool 62 is moved toward the heat insulation 16 until the teeth 72 of the saw section 70 start cutting into the thermal insulation 16. Then, by moving the hand tool 62 back and forth along the heat insulation, work continues until the generated insertion groove 34 is so deep that the contact region 68 rests against the outside 20 of the thermal insulation 16. Then, the same is repeated for a subsequent portion of the thermal insulation 16.

Claims (12)

Cleaning strip for attachment to a thermal insulation (16) of a building (22) in the region of the transition between the underside (18) and the outer side (20), comprising: a first leg (4) intended to overlie at least a portion of the underside (18) of the thermal insulation (16); a second leg (6) intended to superimpose a portion of the outside (20) of the thermal barrier (16); and a plug-in area (8) which projects away from the side of the second leg (6) facing the heat-insulation and the is intended either for tight insertion into a Einstecknut (34) in the outer side (20) of the thermal insulation (16), - Is designed or such that it from the outside (20) of the thermal insulation (16) forth in the material of the thermal insulation (16) can be inserted. Cleaning strip according to claim 1,
characterized in that the insertion region (8) has a number of individual insertion projections (44). Cleaning strip according to Anrpuch 2,
characterized in that the male projections (44) are provided with a barb-like function. Cleaning strip according to claim 1 or 2,
characterized in that the first leg (4) is designed to define its mounting position in relation to the underside (18) of the thermal insulation (16). Cleaning strip according to claim 4, characterized in that the first leg (4) has on its upper side an adhesive tape. Cleaning strip according to one of claims 1 to 5,
characterized in that the first leg (4) for tight insertion into a gap (30) between a heat insulation (16) from below supporting support (50) and the underside (18) of the thermal insulation (16) is determined. Cleaning strip according to one of claims 1 to 6,
characterized in that the first leg (4) is intended for tight insertion into a gap (30) between the underside (18) of the thermal insulation (16) and the upper side (28) of a further thermal insulation (26) of the building (22), the bottom of the first-mentioned thermal insulation (16) connects. Cleaning strip according to one of claims 1 to 7,
characterized in that a Armierungsgewebeabschnitt (58, 12) is attached to the first leg (4) and / or the second leg 6. Cleaning strip according to one of claims 1 to 8,
characterized in that the first leg (4) at a distance from the apex of the cleaning strip (2) has a lower, longitudinally extending projection (56) which can be used as a plaster boundary. Cleaning strip according to one of claims 1 to 9,
characterized in that in the region of the apex of the cleaning strip (2) a water nose (10) is provided. Cleaning strip according to one of claims 1 to 10,
characterized in that it is designed such that in the finished state of the building, the second leg (4) is embedded substantially in plaster. Hand tool for generating a Einstecknut (34) in a heat insulation (16),
characterized by a guide region (66) which can be guided along the underside (18) of the thermal insulation; a sawing area (70) extending substantially parallel to the guide area (66); and a hand-grip retention area (64).

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