EP2492430A2 - Insulation panel - Google Patents

Abstract

The element (6) has a support section (12) provided for a window sill (8) and a projection (15), where the projection extends over length of the element. A side of the projection lies adjacent to a sill connector (9) in a mounting position when viewed in a horizontal position. Another side of the projection serves as a stop for another window sill (10). A retaining groove (14) is provided adjacent to the projection. The connector is designed in form of a plastic strip with hollow chambers and is adhered at the projection, where an upper side of the section is designed as an inclined surface. An independent claim is also included for a window frame and soffit brickwork assembly comprising an insulating element.

Description

The invention relates to an insulating element which is to be arranged between the underside of a window frame and the reveal masonry.

A window is set with its frame known in a masonry reveal. On the two vertical sides and the top of the soffit is plastered, the plaster is usually used up to the window frame. At the bottom of two window bands are arranged, an outside window sill, such as an aluminum sill, and an interior sill, for example, marble, granite, natural stone, wood or wood composites. In order to position the sills exactly and be able to fix them in the case of the outside window sill, a bank connection has heretofore been provided on the underside of the window frame, usually in the form of a mostly hollow-chambered bar which extends along the window frame. This bank connection projects from the window frame to the reveal masonry. The two window sills are placed on both sides of the bank connection, the outside window sill is usually screwed to it, the window sills being fixed in each case via corresponding mortar bands applied to the reveal masonry. The bank connection thus serves as a stop respectively fastening element for the two sills.

As described, the bank connection is ultimately only a relatively narrow, mostly hollow strip, which is usually already connected to the window frame at the factory. In particular, the hollow chamber design, a certain thermal insulation is achieved. However, this is not very good, especially after the two sills, both of which are made of materials that conduct heat well, strike directly. This means that a horizontal thermal bridge results in this area, so that overall the local thermal insulation is not very good.

The invention is thus based on the problem of specifying a possibility with which a good thermal insulation can be achieved in a simple manner in this area.

To solve this problem, an insulating element is provided according to a first alternative of the invention, which is to be arranged between a window frame with a protruding on its underside frame bank connection as a stop for a first sill and a revetment masonry, this plate-shaped insulating element is characterized in that at least one support portion for a Window sill and a projection extending over the length of the element is provided, one side of which, when viewed in the assembled position, lies horizontally adjacent to the bank connection and whose other side serves as a stop for a second sill.

The insulation element according to the invention is to be arranged in the sensitive area between the underside of the window frame and reveal masonry and, due to its geometric configuration, enables excellent thermal insulation in the horizontal direction. This is made possible on the one hand by the plate-shaped design of the Dämmelements so that it can be placed flat on the masonry and offers an extremely good thermal insulation due to its width in this area. The inventively provided, in the mounting position on the top of the element upwardly extending projection has a dual function. On the one hand, it serves with its two sides, on the one hand, as a contact surface for the bank connection provided in this embodiment of the invention or the intended use of the insulating element on the window frame, which rests on the outside of the projection in the assembly position. On the inside of the projection serves as a stop for the room-side windowsill. At the same time an excellent thermal insulation is realized in the horizontal direction due to the vertical extent of the projection to the window frame, which rests on him. While only the narrow bank connection has hitherto been counteracted during the transport of heat, in the assembly position now, in addition to the integration of the insulating element according to the invention, the outstanding insulating property of the horizontally adjacent one also unfolds, ie with a view from the masonry outside inside behind the bank connection lying projection, so that in total seen in this horizontal direction can achieve an extreme improvement in thermal insulation. The bank connection is located on the outside of the projection, so that it is sealed over it to the weather side. The insulating element itself may consist of any insulating material such as polystyrene different designs or polyurethane or other foamable in particular insulating materials.

An expedient embodiment of this first alternative embodiment provides that a receiving groove is provided adjacent to the projection, into which the bank connection engages in the assembly position. This means that the bank connection, which has so far represented a heat sink over its entire vertical length, is additionally accommodated with its lower end in a groove which, viewed from the outside of the masonry, preferably receives it by at least half of its vertical length, so that only a very short height section of the bank connection is not surrounded by the insulating material. In addition, can be achieved in this way, a very simple alignment of the Dämmelements the window frame. Preferably, the bank connection engages in a positive or non-positive bond in the groove, in which optionally also a sealing swelling tape may be received.

A second basic invention alternative of an insulating element is suitable for use with a window frame which has no bank connection. Such a suitable insulating element is characterized in that it is also designed plate-shaped and has at least one support portion for a sill and extending over the length element projection on one side serving as a stop for the first sill bank connector is arranged and the other Side serves as a stop for the second sill.

In this second basic embodiment of the invention, the bank connection, which is ultimately due to the integration of Dämmelements in this thermally sensitive area only to a sufficiently stable, a screwing the exterior window sill enabling component is arranged on the heat-insulating element itself or integrated there, preferably glued. This means that no separate bank connection must be provided on the frame side, rather, the insulating element is a preconfigured component with integrated bank connection, which is preferably designed in the form of a plastic strip and is adhered to the outside protruding on the top of the element. Such, optionally executed as an angle bar without a hollow chamber is the simplest embodiment of a bank connection, a thickness of, for example, 5 mm is sufficient to screw the outside windowsill can. Of course, a slightly stronger hollow plastic strip with a thickness of z. B. 10 mm or 15 mm can be used as a bank connection. As part of the assembly in this case, only the bank connection with its top or in the edge region with the window frame to connect, usually stick, while glued in the first embodiment, the frame side provided bank connection with the insulating element in the region of the projection respectively in the region of the receiving groove ,

This invention alternative allows in the same way excellent insulation in this area, since here the central projection is provided, which in turn is adjacent to the insulation element integrated bank connection, so that no heat sink in the horizontal direction even with the arrangement of window sills, which in turn in the case of External bench on the insulation element side integrated bank connection or in the case of the inner bank to the projection itself strike given is.

Another advantage of the interposition of the projection within this horizontal structure is that the inner window sill can be made shorter, after this is no longer as before to lead to the bank connection. Rather, the bank length can be shortened by the width of the projection, so for example at a projection width of 30 mm by just this measure, so that less material is consumed or the sill can be made a little cheaper overall.

As described, in the simplest embodiment, only one support section for a sill is provided which extends horizontally away from the projection. Such an insulating element is very well suited in the field of old building renovation, since in setting a new window this is not always the case, for example. the inner windowsill is replaced. This remains installed, the projection of the mounted Dämmelements nevertheless strikes the windowsill. Only the outer window sill is supported by the one provided support portion. Equally usable is such an insulating element even if the outer window sill is not exchanged, it is then only provided a support portion for the inner sill.

An insulating element, which can be used above all in the new building sector, is distinguished by two separate support sections for one window sill in each case, i. that in this case both sills are each supported by a support section. With the two support sections, since the insulation material length is even larger horizontally, the insulation can be further improved.

As already described, one or two support sections for one or both window sills are provided on the damping element side, which rest directly on the upper side of the respective support section. According to a particularly expedient embodiment of both invention alternatives is provided that the top of a support section, which serves to receive the window sill, at an angle to the horizontal or, if the second support section is provided to the top of the other support section, so it is as an inclined surface executed. Usually, an outdoor window sill must be inclined at an angle of a few, usually 5 ° to the horizontal, so that pending water, whether driving rain or condensation, can run away from the window. According to the invention, it is now provided that the upper side of the support section, which accommodates this outer window sill, is already bevelled, that is to run at this predetermined angle, so that the window sill mounted thereon is automatically arranged at the defined, predetermined angle to the horizontal. The top of the optionally provided other support section usually runs horizontally, after the windowsill worn by him is inside the room and a slope is not required.

Further, the inclined surface in the region adjacent to the projection in a second inclined surface with opposite inclination or a rounding pass. This further inclined surface or rounding allows easier insertion of the outer window sill, which is to bring with its front upper edge between an outer web of the window frame and the bank connection. The oblique surface or rounding allows easy pivoting into the end position, any dirt, etc., since the inclined surface or rounding provides sufficient space, this movement does not hinder.

The projection itself should have a width of 25-50 mm, in particular of about 30 mm, wherein the projection may well be wider than 50 mm, depending on how wide the window frame is actually. For standard window frames, the frame thickness is about 70 mm, which is why a projection width of about 30 mm is sufficient. However, in the case of very wide frames, such as are sometimes used for very large windows as custom-made designs, it is certainly also possible to use projections which are significantly wider than 50 mm.

In order to be able to vary the projection width in a simple manner, an embodiment of the invention provides that the projection consists of a first broad projection section and one or more further, but narrower projection sections running parallel to one side. This multi-part embodiment of the protrusion is advantageous in that such a narrow protruding portion can be easily separated so that the actual protrusion width is limited from a maximum width defined by the first broad protruding portion and all narrower portions provided to a minimum width. defined only by the first width projection portion, can vary over the individual separation stages. The individual projecting portions are separated from one another, for example, by a very narrow gap. For example, the wide projecting portion 30 mm thick, each further narrower protruding section 5 mm, with approx. 1 mm distance between the individual sections. The separation can be done easily with a knife or the like tool or by breaking (possibly along a predetermined breaking line on the projection portion).

The insulation element according to the invention can be used readily in new construction as well as in the field of old building renovation. Especially in the field of old building renovation are often very strong reveals, with wall thicknesses up to 40 cm and more. In order to give the possibility of a broad adaptation of Dämmelements, the standardized, for example, a width of at least 15 cm, in particular of at least 20 cm, is provided according to the invention to attach to a longitudinal side of the Dämmelements an extension section. Such an extension section may for example have a width of 5 cm. With a standard width of 20 cm, the insulation element with two extension sections on both sides can be extended by 10 cm to a total of 30 cm, so that with a wall thickness of 40 cm on both sides of the Dämmelements each only about 5 cm distance to the wall surface remain where then the subsequent mortar tape can be applied. On the one hand, the horizontal width of the Dämmelements be increased here, on the other hand, the width of the applied mortar tape, so that less mortar is to turn. While the above example of a substantially central arrangement of the window frame based on the reveal depth, it is of course conceivable to set the insulating element off-center, if this is necessary, for example, due to the Rollokastens or the like. In this case, it is also possible to attach an extension section only on one side or to attach an extension section to a further extension section in order to build it up horizontally. The attachment of an extension portion on one longitudinal side is expediently carried out on both provided connecting means, in particular in the form of tongue and groove or the like, wherein in this way, of course, two extension sections can be coupled together. Alternatively, of course, there is always the possibility to glue the components together.

In order to be able to adjust the height of a support section, in particular of the support section supporting the inner window sill, a further development of the invention provides a support element that can be detachably attached to a support section, in particular the inner support section. This is preferably done via provided on the support portion and the support element connecting means, in particular in the form of tongue and groove, so that both can be easily inserted into one another and optionally glued. The fixation can also be done only by gluing.

The insulating element should have a length of at least 25 cm, in particular 50 cm or 100 cm. Typically, a masonry reveal is just over 1 m wide, so that when dimensioning the Dämmelements of example 50 cm easily two insulation elements that are glued together in the middle, can be set. The insulating element but also z. B. 125 cm long, so that it can be easily adjusted by cutting the soffit length, or two such long insulating elements z. B. lining a 250 cm reveal. The actual length is always to be chosen so that a denomination, possibly by cutting the Dämmelements, which is readily possible, can be done without further notice. As the insulation element is cut to length, it is readily cut in width, that is, one or the other support portion can be shortened seen easily over its length, if this is due to the position of the arrangement of the window frame relative to masonry reveal and the reveal depth is required. For it must be ensured that the two longitudinal sides of the insulating element always have a certain distance from the masonry edge, in order to be able to apply the two mortar tapes which support the respective window sill.

To improve the anchoring of the insulating element in the adhesive, mortar or foam layer on the soffit inside the underside of the Dämmelements can be structured, which can be realized in particular via a groove or tooth structure. In this structure penetrates the tough glue, mortar or foam, which can be achieved via a good connection.

In addition to the insulation element according to the invention itself, the invention relates to a composite of window frame and reveal masonry with an arranged between the underside of the window frame and a reveal masonry insulation element of the type described, on which insulating element on a support portion a first sill and the other support portion a second sill is arranged. In this case, in the composite according to the invention, either the bank connection can be arranged on the window frame itself, so that an insulating element of the first basic design is used, as well as the window frame can be designed without bank connection, in which case the bank connection is integrated dämmelementseitig, thus an insulating element of the second basic version is used.

If a bank connection is provided on the window frame, then it is accommodated positively and / or non-positively in the receiving groove provided on the insulating element. The frame side provided bank connection is further glued in the mounting position with the insulating element, either in the region of the vertical end face of the projection or in the region of the receiving groove or in both areas. If the bank connection is provided on the insulating element side, the bank connection provided on the insulating element is glued to the window frame.

The sills themselves are most conveniently glued to the receiving portions, usually the outer sill, especially if it is made of aluminum, is additionally bolted to the bank connection.

On the long sides of the Dämmelements or possibly one or both extension elements finally includes in each case a mortar tape, which additionally carries the respective sill.

Fig. 1

eine Prinzipdarstellung eines erfindungsgemäßen Verbundes mit integriertem erfindungsgemäßen Dämmelement,

Fig. 2

eine Perspektivansicht des Dämmelements aus Fig. 1,

Fig. 3

eine Perspektivansicht eines Dämmelements einer zweiten Ausführungsform,

Fig. 4

eine Perspektivansicht eines Dämmelements einer dritten Ausführungsform,

Fig. 5

eine Schnittansicht eines Dämmelements einer vierten Ausführungsform,

Fig. 6

eine Schnittansicht eines Dämmelements einer fünften Ausführungsform, und

Fig. 7

eine Schnittansicht eines Dämmelements einer sechsten Ausführungsform.

Further advantages, features and details of the invention will become apparent from the embodiments described below and with reference to the drawings. Showing:

Fig. 1

a schematic diagram of a composite according to the invention with integrated insulation element according to the invention,

Fig. 2

a perspective view of the Dämmelements Fig. 1 .

Fig. 3

a perspective view of an insulating element of a second embodiment,

Fig. 4

a perspective view of a Dämmelements a third embodiment,

Fig. 5

a sectional view of a Dämmelements a fourth embodiment,

Fig. 6

a sectional view of a Dämmelements a fifth embodiment, and

Fig. 7

a sectional view of an insulating element of a sixth embodiment.

Fig. 1 shows a composite according to the invention 1 consisting of a window 2 with a window frame 3, a masonry 4 with a masonry reveal 5, in which the window 2 is set, an insulation element 6 according to the invention, which is set between the masonry reveal 5 and the bottom 7 of the window frame 3 and a first window sill 8 arranged on the outside, which abuts against a bank connection 9 projecting on the underside 7 of the window frame 3, and a second inner window sill 10.

The insulating element 6 according to the invention is plate-shaped and placed with its flat bottom 11 on the surface of masonry reveal 5. It has a first support section 12, on the upper side of which the first sill 8 is placed. The top is at an angle of about 5 ° to the horizontal, so that automatically results in mounting the sill 8, which is usually made of aluminum, the predetermined inclination angle, see Fig. 1 , At a second support portion 13 sits on the upper side, the second window sill 10, for example, a marble or granite bench. The top of this support portion 13 is horizontal after the inboard sill 10 is not prone.

As described, a bank connection 9 is arranged on the window frame 3 itself, usually already adhered to the factory. The bank connection 9 is an elongated strip, which is designed here as a hollow-chamber strip. It extends from the frame bottom 7 down. On the insulating element 6 a receiving groove 14 is provided, the shape and size of the shape and size of the bank connection 9 corresponds, so that it engages in the receiving groove 14 and is preferably non-positively or positively held. As described, the first window sill 8 strikes the bank connection 9; it is usually also fixed to it by means of screws.

The insulating element 6 also has a projection 15 which extends, based on the Dämmelementunterseite, vertically upwards. It has a substantially rectangular geometry. It extends to directly on the underside 7 of the window frame 3, that is, this sits on top of the projection 15, which is why the total insulation element 6 is made of sufficiently pressure-resistant material such as PS or PU. The projection 15 is obviously located immediately adjacent to the bank connection 9, this is preferably on the vertical outer side of the projection 15 (in Fig. 1 the right outer side) glued, as appropriate, in the region of the receiving groove 14th

The projection 15 serves not only as an attachment point for the bank connection 9, but also as a stop for the second sill 10, which can be seen with its frame-side end side rests directly on the projection 15.

The projection 15 is thus, seen horizontally, set between the first sill 8 respectively the bank connection 9 and the second sill 10. After this he immediately adjacent to the window frame 3, results, seen horizontally, a thermal barrier. A heat transfer from the inside to the outside is here largely prevented, compared with the previous embodiment in the prior art, where no insulating element 6 was used and both sills 8, 10 directly adjacent to the bank connection 9, which was the sole "Dämmelement" in this area ,

As part of the assembly, the insulating element 6 is first placed on the reveal inside, preferably glued. Then, the window frame is mounted, wherein the bank connection 9 is inserted into the receiving groove 14 and the insulating element is glued to the frame bottom 7 and the bank connection 9. Then 6 mortar bands 18, 19 are applied to the longitudinal sides 16, 17 of the Dämmelements, after which the two window sills 8 and 10 are set and fixed.

For the sake of completeness is in the sectional view according to Fig. 1 nor the located in the area of the upper side of the soffit roller blind box 20 is shown with integrated Rollopanzer.

Fig. 2 shows in an enlarged perspective view of the insulating element 6 Fig. 1 , It has a substantially plate-shaped body 21 with a flat underside 22. Shown is the first support portion 12 with its inclined surface 23 and the second support portion 13 with its flat surface 24. Also shown is the receiving groove 14, as well as the rectangular projection 15 whose vertical outer side 25 limits the receiving groove. On this outside 25 is like Fig. 1 the bank connection 9 indicates. The opposite inner side 26 serves as described as a stop surface for the second sill 10th

On the two longitudinal sides 16, 17 each receiving grooves 27, 28 are provided. These serve for a better connection with a mortar tape, on the other hand can be done in them, the fixation of an extension member 29. Such is in Fig. 2 additionally shown. It is also made of insulating material and has a spring 30 inserted into the groove 28 (or 27) can be, so that preferably results in a positive or frictional connection. Over this horizontally seen a support portion 12, 13 are extended. On the opposite side, the extension element 29 has a further groove 31, into which the spring 30 of a second extension element 29 can be inserted, so that stepwise any extension of the respective support section can be achieved. If such an extension portion 29 is provided for extending the first, obliquely receiving portion 12, its shape may be adapted to the slope, that is, it may decrease in height to continue the inclined surface 23.

Fig. 3 shows a further inventive embodiment of a Dämmelements 6, wherein like reference numerals are used for the same components. Also, this insulating element 6 has a body 21 with a flat bottom 22 and the two support portions 12, 13 with the located on their longitudinal sides 16, 17 grooves 27, 28. Again, the top 23 of the first receiving portion 12 is made oblique, while the top 24 of the second receiving portion 13 extends horizontally.

Again, a projection 15 is provided, the left inner side 26 again serves as a stop for the second sill. On the opposite outer side, therefore, even the bank connection 9 is arranged in the form of a strip in this embodiment of the invention on the insulating element, which is shown here as a solid material strip, but equally can also be embodied as a hollow-chamber strip. This means that here the bank connection 9 is integrated on the insulating element 6 itself, the bank connection 9 is glued to the projection 15 expediently. As shown in dashed lines, could also be a receiving groove 14 may be provided, in which then the vertically seen slightly longer bank connector 9 is inserted, similar to the embodiment of the FIGS. 1 and 2 , However, however, it is always an integral part of the Dämmelements 6 and not arranged on the window frame 3. That is, the window frame 3 is bankanschlusslos, the connection of the bank connection 9 to the window frame 3 takes place only during the assembly of the window frame, both are glued together.

Finally shows Fig. 4 another insulation element 6 according to the invention, which in its basic form the insulating element 6 according to Fig. 2 equivalent. However, the projection 15 here consists of a total of four separate projection portions 15a, 15b, 15c and 15d. The projection portion 15a is relatively wide, for example, it has a width of 30 mm. Each of the protrusion portions 15b-15d is, for example, 5 mm wide, all the protrusion portions are separated from each other by a narrow gap. It is now possible to gradually adjust the overall width of the projection 15 by separating one or more of the narrow projection portions 15d, 15c, 15b. This can be done by simply canceling or cutting off a projection section. This can be easily adapted to the width of the projection different window frame widths. For example, the entire protrusion 15 has an overall width of about 50 mm, with the wide protruding portion 15a having a width of 30 mm and each protruding portion 15b-15d having a width of 5 mm.

Fig. 5 shows a further embodiment of a Dämmelements 6 according to the invention, the underside 22 is structured via a groove structure 32. This can be done even better connection of the Dämmelements 6 with his fixation on the soffit inside serving adhesive or mortar. Such structuring can of course also in the Dämmelementausführungen the Figures 1 - 4 be provided.

The top 23 of the outer support portion 12 is designed as an inclined surface as in the other embodiments. The inclined surface is in the area that ends adjacent to the projection 15, in a further inclined surface 33, which serves for the simplified assembly of the outer sill 8. This must be brought with its upper edge in the area between the bank connection 9 and the front window frame edge, as in Fig. 1 is shown. For this purpose, the sill 8 is slightly tilted introduced from below. In order to be able to swing it down in a simple manner, without any dirt, the is in the area and the like hinders this, this inclined surface 33, which may also be designed as a curve, appropriate.

Furthermore, the second support portion 13 is provided on its upper side with connecting means in the form of grooves 34 in which springs 35, which are arranged on the underside of a support element 36, engage. The support member 36 is a relining mold to slightly raise the support surface for the inner sill. In this way it is possible to mount even narrower, for example, only 22 mm thick window sills, which are then at a correct distance from the lower edge of the window frame. The support element is to install if necessary, after it is detachably placed, it is held on the tongue and groove connection either slightly clamped, but can also be glued if necessary. Of course, it is also possible to apply a relining molding not provided with suitable connecting means via a pure adhesive bond.

Fig. 6 shows an inventive Dämmelement 6, wherein the Dämmelementkorpus 21 only the outer sill 8 receiving support portion 12 and the projection 15 are provided. That is, the second support portion 13 is not provided here. This insulating element 6 is particularly suitable in the field of old building renovation, if the inner window sill is not removed and replaced with a new one. The projection 15, the here (as well as in the embodiment according to Fig. 5 ) has an upper side groove 37 for receiving a swelling tape, which automatically swells and seals against the frame bottom, has, strikes with its outside 26 against the set still in the soffit inner window sill, only the outer sill 8 is on the support portion 12 worn. Otherwise, the embodiment corresponds as far as in Fig. 5 shown.

Finally shows Fig. 7 another embodiment of a Dämmelements 6 with also only the support portion 12 and the projection 15, but here on the projection 15 - comparable to the embodiment according to Fig. 3 - A bank connector 9 is arranged in the form of a narrow angle bar, one leg 38 is glued to the outside 25 of the projection, while the other leg 39 engages over the top of the projection 15. On it lies in this embodiment of the window frame.

Finally, it should be noted that it would also be conceivable in principle to execute the projection 15 as a separate component, which can be plugged into the plate-shaped body. Here, in turn, a tongue and groove connection, such as in the fixation of an extension element, can be used. This makes it possible, for example, to fix different widths or different heights 15 optional.

As described, the central element according to the invention is the projection 15 which, in comparison to the prior art, is arranged in the area directly below the window frame in addition to the bench connection. This can achieve a significant improvement of the thermal insulation, which is also clearly expressed in the calculated for the respective embodiments heat transfer coefficient U.

mit

• U = Wärmedurchgangskoeffizient in W/m²K
• Rse = äußerer Wärmeübergangswiderstand in m² K/W
• Rsi = innerer Wärmeübergangswiderstand in m² K/W
• d1 = Schichtdicke einer ersten Schicht in m
• λ1 = spezifische Wärmeleitfähigkeit des Materials der ersten Schicht in W/m K
• d2 ..... n = Schichtdicke einer zweiten ..... n-Schicht in m
• λ2 ... n = spezifische Wärmeleitfähigkeit des Materials der zweiten .....n-Schicht in W/m K.

The heat transfer coefficient U is calculated as follows: $$\mathrm{U}=\frac{1}{\mathit{rse}+\frac{d1}{\lambda 1}+\frac{d2}{\lambda 2}+\mathrm{....}+\frac{\mathit{dn}}{\mathit{.lambda..sub.n}}+\mathit{Rsi}}$$

With

• U = heat transfer coefficient in W / m ² K
• Rse = external heat transfer resistance in m ² K / W
• Rsi = internal heat transfer resistance in m ² K / W
• d1 = layer thickness of a first layer in m
• λ1 = specific thermal conductivity of the material of the first layer in W / m K
• d2 ..... n = layer thickness of a second ..... n layer in m
• λ2 ... n = specific thermal conductivity of the material of the second ..... n layer in W / m K.

• Rse = 0,04 m²K/W (Übergang Außenluft - Bankanschluss)
• Rsi = 0,13 m²K/W (Übergang Bankanschluss bzw. Vorsprung - Innenluft)

Two calculation examples are given below, namely the U value for the bank connection itself, consisting of a bar with a hollow chamber, similar to FIG Fig. 1 and, as a second example, a combination of such a bank connector with a 30 mm thick protrusion of foamed polystyrene containing graphite particles as sold under the trade name "Neopor". The following parameters apply:

• Rse = 0.04 m ² K / W (transition outside air - bank connection)
• Rsi = 0.13 m ² K / W (transition bank connection or projection - inside air)

Bank connection:

• Material: PVC
• Thickness of a vertical wall: 0.0025 m
• Width hollow chamber with air: 0.01 m
• λ _PVC = 0.1 W / m K
• λ _air = 0.125 W / mK

Leaps:

Material: foamed polystyrene ("Neopor") Strength advantage: 0.03 m λ _Styrofoam 0.031 W / m K.

• Bankanschluss: U = 3,33 W/m K
• Kombination Bankanschluss - Vorsprung: U = 0,79 W/m K.

From this the following U-values are calculated using the formula above:

• Bank connection: U = 3.33 W / m K
• Combination bank connection - lead: U = 0.79 W / m K.

This clearly shows how serious the insulation improvement is by integrating the projection. It is possible to achieve a reduction in the U-value of the combination of bank account and lead to less than a quarter of the U-value of the bare bank account, as it was previously installed.

The specified U values are merely exemplary in nature for the boundary conditions or materials used above. They are by no means limiting.

Claims (17)

A plate-shaped insulating element having at least one support section for a sill and having a projection extending over the element length, wherein the insulating element is adapted to between a window frame, which comprises a protruding on the frame bottom bank connection as a stop for a first sill, and a reveal masonry arranged , characterized in that the one side of the projection in the mounting position horizontally adjacent to the bank connection (9) and its other side serves as a stop for a second sill (10), wherein the projection (15) from a first broad projecting portion ( 15a) and one or more on one side parallel thereto extending further, but narrower projection portions (15b, 15c, 15d) consists. Insulating element according to claim 1, characterized in that adjacent to the projection (15) has a receiving groove (14) is provided, in which engages in the mounting position of the bank connection (9). Plate-shaped insulating element with at least one support section for a sill and with a projection extending over the element length, wherein the insulating element is adapted to be disposed between a window frame and a reveal masonry, characterized in that on one side of the projection as a stop for the first sill (8) serving bank connection (9) is arranged and its other side serves as a stop for the second sill (10), wherein the projection (15) of a first broad projecting portion (15 a) and one or more parallel on one side extending further, but narrower projection portions (15b, 15c, 15d) consists. Insulating element according to claim 3, characterized in that the bank connection (9) in the form of, optionally one or more hollow chambers having executed plastic strip and is glued to the projection (15). Insulating element according to one of the preceding claims, characterized in that two support sections (12, 13) for two window sills (8, 10) are provided. Insulating element according to one of the preceding claims, characterized in that the upper side (23) of the support section (12), which serves to receive the windowsill (8) abutting the bank connection (9), is designed as an inclined surface. Insulating element according to claim 6, characterized in that the inclined surface in the region adjacent to the projection (15) merges into a second inclined surface (33) with opposite inclination or an opposing sloping rounding. Insulating element according to one of the preceding claims, characterized in that the projection (15) has a width of 25 mm - 50 mm, in particular of 30 mm. Insulating element according to one of the preceding claims, characterized by at least one on one longitudinal side (16, 17) of the Dämmelements (6) attachable extension portion (29), preferably further on the longitudinal side (16, 17) and the extension portion (29) connecting means, in particular in the form of groove (27, 28) and spring (30) are provided. Insulation element according to one of the preceding claims, characterized in that a support element (36) is provided which is detachably attachable to a support portion (12, 13), in particular the inner window sill (10) receiving support portion (13), preferably further on the support section (12, 13) and on the support element (36) Connecting means, in particular in the form of groove (34) and spring (35) are provided. Insulating element according to one of the preceding claims, characterized in that it has a length of at least 25 cm, in particular of 50 cm or 100 cm, and / or that it has a width of at least 15 cm, in particular of at least 20 cm. Insulating element according to one of the preceding claims, characterized in that the underside (22) is structured, in particular a groove or tooth structure (32). Composite of window frame (3) and reveal masonry (5), with an arranged between the underside of the window frame (3) and the reveal masonry (5) insulating element (6) according to one of the preceding claims, on which at a receiving portion (12) a first sill (8) and at the other receiving portion (13) a second sill (10) is arranged. Composite according to Claim 13, characterized in that the bank connection (9) provided on the window frame (3) is received in a form-fitting and / or non-positive manner in the receiving groove (14) provided on the insulating element (6). Composite according to Claim 13 or 14, characterized in that the bank connection (9) provided on the window frame (3) is adhesively bonded to the insulating element (6), or that the bank connection (9) provided on the insulating element (6) engages with the window frame (3). is glued. Composite according to one of claims 13 to 15, characterized in that the window sills (8, 10) are glued to the receiving portions (12, 13). Composite according to one of claims 13 to 16, characterized in that on the longitudinal sides (16, 17) of the Dämmelements (6) or optionally one or both extension elements (29) each have a mortar strip (18, 19), the respective window sill (8 , 10) additionally carries, connects.

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