NO349003B1

NO349003B1 - Improved building framework construction in buildings outer walls

Info

Publication number: NO349003B1
Application number: NO20230952A
Authority: NO
Inventors: Arild Hardeng
Original assignee: Arild Hardeng
Priority date: 2023-09-06
Filing date: 2023-09-06
Publication date: 2025-08-25
Also published as: NO20230952A1

Description

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Improved building framework construction in buildings outer walls

Field of the invention

The present invention concerns a construction element and more specifically a construction element suitable for installation of hidden electric cables, and an insulation system making use of the construction element.

Background

Newer peripheral wall constructions in building walls are normally built up with an external wind seal and an internal diffusion barrier that prevents moisture from penetrating the construction's insulation. In the 1970s, 100 mm insulation became common, in the 1980s, 150 mm insulation became common. In Norway, TEK 10 was introduced in 2010 and increased the insulation requirements. Today, it is normal to use 25 cm or thicker insulation to meet the requirements of TEK 17.

How are today's insulated half-timbered walls for peripheral wall constructions constructed?

Fig. 1 shows an insulated outer wall with 200 mm insulation where the diffusion barrier is located directly behind the interior cladding, mainly gypsum. The junction box (terminal, switch, plug) is here led out through a diffusion barrier and interior cladding in the traditional way. The figure shows the old design of the outer wall with insulation and electrical installation. This construction with ca. 100 mm insulation has a typical U-value of ca. 0.22.

Fig. 2 the so-called "Swedish system" with 200 mm insulation between the main framing and additional 48 mm insulation lining between inner framing, the so-called internal service cavity with insulation. The diffusion barrier is here behind the junction box, which is placed in an insulated lining. This construction has a typical U-value of ca. 0.18, which is a satisfactory insulation capacity compared to TEK 17.

The so-called "Swedish system" according to Fig. 2 has a number of advantages compared to the previous solution according to Fig. 1. Namely,

a) significantly better protection against leaking penetrations,

b) changes to the electrical installation can be made without touching the diffusion barrier,

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c) the system with 5 cm of insulation outside the diffusion foil also protects to a large extent against holes that occur during the life of the building. The point is that in several places you have to insert tools more than 6 cm into the wall before you run the risk of damaging or making holes in the diffusion barrier after fitting furniture, bookshelves or the like,

d) current conductors are better protected against overheating (they are normally located at the outermost in the insulation).

But the system has weaknesses too. Namely,

e) an "extra" wall must be built with associated material use and working hours,

f) insulation must be measured and adjusted on both sides of the diffusion foil (typically 5 cm 20 cm insulation). This results in increased workload,

g) it can be difficult to detect poor insulation using thermal photography in a "doubleinsulated" wall, this particularly applies if the insulation around the electrical installation is poorly done,

h) electrical installation (pipes and boxes) must be placed "neatly and decoratively" in the 5 cm thick insulation in the lining. In practice, this is easier said than done. There will be some flexibility in the electrical pipes if corrugated pipes are used. Standard Glava insulation in 5 cm thickness (or equivalent insulation) does not significantly contribute to keeping the pipes in place. The electrical pipes should lie at the outer end against the inner wall so that any heat development in the conductors can be led out of the insulation. In theory, the electrician should make a 16 or 20 mm deep groove in the insulation in which the electrician's pipe is placed. Where the electrician's pipe is to pass the 48 mm battens, it should be drilled in the center of the battens so as not to unnecessarily weaken the strength of the battens. This would mean that the groove for the electrician's pipe should be made 10 – 15 mm deeper at both ends of the insulation so that the insulation would not be pinched flat with poorer insulation performance as a result. In practice, the insulation is clamped flat here and there, and the electrician's pipe is placed outside the insulation to prevent the insulation from falling out. If the carpenter comes after the electrician has done the job, the same thing will happen. The solutions will not be optimal and during the life of the building, an unknown number of kWh will be wasted as a result of the insulation not being optimal. If you want to change this situation, you must get "built-in solutions that are industrially prepared".

Insulation of the “Swedish system” is carried out in 2 stages. The diffusion foil is first attached to the framing. The wall is then lined internally with 2-inch batten. The lining is attached directly to studs, top sill and bottom sill. The lining will clamp the foil firmly

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against the studs located behind. After this, the lining wall (the 48 mm) is insulated with insulation. The diffusion foil should preferably be fairly firm so that it can withstand the pressure created by the diffusion barrier if the insulation is blown into the wall from the outside of the diffusion barrier. Alternatively, the diffusion barrier should be supported with a plate or similar to prevent bulging. Electrician installation and insulation of the layer between membrane and internal wall cladding is then carried out in the traditional way. Finally, the interior cladding is installed. Insulation can then be blown in through holes in the top of the building framework (typically through holes in the top sleeper) or, as a subsidiary alternative, through the cladding on the exterior of the building framework. After this, the blowholes are closed again.

Moelven's Iso3 construction is a patented construction framing plank (stud) consisting of 2 "planks" glued together using PUR-foam. The point of the construction is that it effectively breaks thermal bridges, e.g. in peripheral walls where the framing plank is used. The Iso3 framing plank is delivered in various formats, the most common has a width of 200 mm, giving the wall a U-value of ca. 0.18. This U-value makes it possible to meet the requirements of TEK 17 with a slim (thin) wall construction that does not "eat" square meters. One problem of the "Iso3 200 construction" is that this outer wall does not provide space for the electrical installation or other technical installations.

Alternatively, technical installation is left open or brought down from ceiling systems etc. In practice, this limits the area of use to offices, schools, commercial buildings and the like. In practice, Iso3 has not been widely used in homes due to these problems. People want sockets on the outer wall of their homes and often choose solutions where they pay off the problems, accepting the loss of area.

Iso3 used in a wall with a wall thickness of 200 mm gives a U-value of 0.18, which corresponds to the requirement in technical regulations from 1.8.2009. Conventional half-timbered solutions must go up to a 250 mm wall to meet this requirement. Since this results in a loss of approx. 3.6 sq m. living space in a two-story building with 80 sq 2 floor space, the typical developer wants to use a wall with 200 mm insulation, even if this means that there will be difficulties with the electrical installation in the outer wall or that different variants of open installation will be necessary.

US 6,125,608 discloses an insulated framing system for providing improved thermal insulation in a building such as a home. The insulated framing system includes structural supports such as dimensional lumber studs or metal studs having a rigid insulator attached along at least one edge. The resulting composite member provides a thermal break between the structural support and the sheathing, wallboard, or other supported

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structure. The addition of the insulator deepens wall cavities, permitting installation of more insulation material. One or more wings extend from the insulator into the cavities and facilitates installation and retention of insulation material in the cavities prior to installation of sheet good finish materials such as gypsum wallboard.

The present invention is a further development of today’s building framework constructions, building better buildings cheaper, simplifying execution and improving insulation capacity of peripheral walls at a lower price. The invention is further a development for new installation methods for electricity. The new methods for the construction and insulation of building frameworks have given impetus to improvement and innovation in electrical and technical installation.

The present invention provides an alternative to the above-mentioned systems for halftimbered walls for peripheral wall constructions having an insulated outer wall with insulation where the diffusion barrier is located behind triangular (polygonal) internal battens of 45 mm of highly insulating synthetic material. It is assumed that a specially adapted framing (I-beam) of 155 mm has been used in the construction. Total thickness e.g., panel/gypsum and asphalt windproof = 200 mm. The electrician's box is on the inside of the diffusion barrier and is attached to the I-beam (stud). The construction has a U-value of ca. 0.18.

Wall construction provided by the present invention is the market's only full-fledged outer wall in 20 cm thickness that meets the insulation requirement in TEK 17 with a U-value of ca. 0.18 and which at the same time provides hidden electrical installation in the wall that is industrially prepared for electrical installation with various prefabricated wiring modules that give the fitter great freedom of choice to choose the desired material and different guideways. The wall can be prepared for future retrofitting without the need to drill holes for future sockets, switches etc. The wall's interior cladding can be dismantled for changes to the electrical installation and the like. It is not necessary to touch the insulation during such work. The insulation takes place in one single blow operation. The new outer wall is designed for disassembly and reuse of dismantled components/parts "as is". By increasing the step height of the I-beam (step beam), it is possible to increase the construction's U-value to values required for the passive house standard or, alternatively, to a higher level. Standard framings are delivered in the following width: 20, 25, 30 and 40 cm. The additional costs of increasing the width will be moderate as it is only necessary to increase the width and blow in an increased amount of insulation.

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In an isolated variant of the above outer wall using Moelvens Iso3 200 mm, the diffusion barrier is behind an identical internal triangular-shaped (polygonal) batten of 45 mm made of highly insulating synthetic material. Total thickness e.g. panel/gypsum and asphalt windproof = 245 mm. The electrician's box is on the inside of the diffusion barrier and is attached to the stud. The construction has a U-value of ca. 0.15.

The system according to the present invention gives significant savings with regard to moisture protection. The system, like the "Swedish system", has the diffusion barrier behind the electrical installation, so that it is not normally necessary to make holes in the diffusion barrier for the passage of boxes, pipes and other electrical components in the diffusion barrier.

The first important points are that the system according to the invention provides a more affordable and slimmer alternative to the so-called "Swedish system", which is the dominant building system for erecting peripheral walls with built-in technical installations. The system according to the invention is also a better insulated alternative. This means that the construction's U-value is improved and that the constructions can be erected on site faster and cheaper than current constructions make possible. This is achieved by building the building framework constructions according to new methods in relation to the current execution method as well as improving the insulation methods for such constructions.

The system according to the invention is the only current system on the Norwegian market that can offer an outer wall with a thickness of 200 mm that satisfies the requirements in TEK 17 and which can also have hidden electrical and technical installation.

When using the Swedish system, the insulation has to be made twice. First on the outside of the diffusion barrier and then on the inside of the diffusion barrier. The new system according to the invention enables to insulate once normally from the outside or from the top. The insulation is done by blowing insulation, which is significantly faster than conventional insulation. In addition, blown insulation normally also improves the quality of the work carried out.

The new construction insulates the wall structure better than conventional constructions in that the material in the linings has a better U-value than conventional structural timber (typically 48 x 36 mm) which is normally used in the "Swedish system".

The new building framework system breaks thermal bridges in external walls more effectively than in conventional wall constructions, as the construction uses I-beams instead of structural timber. In addition to better insulation, this contributes to achieving a larger usable area.

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The system is unique in terms of electrical installation.

The final point of the present invention is that it improves the methods and materials for electrical and plumbing installations in buildings. In modern buildings, the technical building trades have accounted for an ever-increasing share of the building's total cost. This is partly a natural consequence of buildings becoming more complex with increasing requirements for management and regulation. The other side of this is that there will be an increasing amount of wires, pipes, boxes, and other items to be incorporated into the building. This work is time-consuming, and it is important to seek solutions where the building is prepared and ready for technical installation to the greatest extent possible.

The arguments for using blown insulation are that it saves time and that uninsulated cavities are avoided. In the industry, it is said that blowing insulation can be carried out in significantly less than half the time compared to traditional execution on a building site. Others argue that this is somewhat optimistic. These large differences in time consumption can of course also be explained by differences in the construction of the building, the number of carpenters participating in the work, different requirements for accuracy in the execution, etc.

The old main argument against blown insulation has been that the insulation collapses so that uninsulated fields occur above the collapsed insulation. Such convergence was a problem in the past. Today, it must be correct to say that these problems have been solved. Bladder insulation is now the best and most economical option in most cases. The conservative building industry has discovered this so that the market for blown insulation is now increasing significantly.

Cavities are avoided, one reason why there is better insulation is that the blown insulation is blown in with excess pressure so that it fills all nooks and crannies where it is not possible in practice to adapt the insulation 100% with conventional techniques.

Another reason for better insulation is that the excess pressure also causes the insulation to adapt to the cavity to be insulated. Such a precise fit by cutting the insulation with a knife is not possible with more complex cavities. Blown insulation is also more homogeneous than cut-to-size insulation, where the insulating ability varies somewhat depending on the treatment it has been subjected to.

Shorter working hours result in lower labor costs. This is a very important point.

Transport and logistics. Traditional insulation normally occurs when a large truck designed to transport volume arrives at the construction site. The insulation is then carried in and stacked. This takes time and requires a lot of space. It is common for the insulation to have to be moved several times to get to it. With blown insulation, it is

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common for the insulation to come in compressed form so that it is not necessary to move the insulation out of the truck. The insulation is fed directly into the blower unit in the truck, where the insulation is expanded and blown directly into the building. This provides major savings in material handling. The economy associated with this material flow is very good compared to conventional design.

Experience shows that switching to blown insulation can provide 10 to over 20% better insulation.

Blow insulation in peripheral walls combined with the "Swedish system" creates problems. It would be natural to first insulate with the fixed or rigid insulation in the 2-inch inner framing between the diffusion barrier/brake and the interior cladding. If the diffusion barrier is placed behind the inner framing (typically 2-inch), means that the electrical installation will be on the interior side of the diffusion barrier. If a relatively pressure-resistant insulation is not inserted in the inner 2-inch cavity, the diffusion barrier will be pressed against installation boxes and other objects, which can puncture the barrier due to the blowing pressure. The risk of puncture is greatest if regular polyethylene foil 0.2 mm or thinner is used. In a "double wall" with the "Swedish system", it is possible to insulate the outside with blown insulation first. This is not done in practice as there would be problems with the diffusion barrier "bulging" out strongly into the inner cavity, so that something would have to be done to prevent this. The last point here is an important part of the explanation for why the Swedish system is only used to a small extent together with blown insulation. There are, of course, several possible solutions to the last problem of "bulging", but this creates new costs.

The first measure is modification of the stud work so that it becomes possible to blowinsulate a modified "Swedish system wall" in a blowing operation. At the same time as the lining or linings are attached to the stud, the diffusion barrier is placed between the stud and lining with electrician's groove for electrician's pipe. This means that the uprights are lined with linings with slots for electricians' pipes and recesses where one or more electrician's boxes can be placed. A very important point when installing the diffusion barrier is that it is mounted so that there is sufficient diffusion barrier fabric to allow it to lie close to the beveled edges of the liners with grooves for electricians' pipes. If the diffusion barrier is mounted too tightly, the diffusion barrier will not lie close to the beveled edges of the linings with grooves .

Installation of the diffusion barrier can be done using different methods. One method is the use of compressed air to get the latch to settle in the desired location.

Figure 8 shows, significant amounts of "cold bridges" along all the inner 2-inch cavity. The cold bridges will appear as an approx. triangle-shaped area on both sides of the 2

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inch cavity. The point is that ordinary diffusion barriers are not sufficiently elastic for the insulation to fill the areas right up. Consequently, the triangular cold bridges occur in connection with the leaching. In the drawings of the building framework construction, the inclination is shown with an angle of 45 degrees. This angle is of course not absolute. Practical experiments with blown insulation have of course shown the obvious, namely that the membrane lays "prettier" the slacker the angle becomes. If there are smaller (triangular) air pockets between the membrane and the triangular, this is not critical as smaller air pockets between 8-12 mm insulate relatively well as the air becomes relatively stagnant.

Alternatively, the membrane is fitted first and then the liner. The electrical installation is then carried out. After this, the wall covering is installed without any insulation of the layer between the foil and the inner panel. The idea here is that the blown insulation should push the foil out towards the inner panel so that only (smaller) triangular areas remain along the liners that are not filled with insulation. The main idea with this design variant is to save time by not having to insulate the layer between the foil and the inner panel. If one is to succeed with such a solution, this requires an elastic membrane and/or that one accepts that significant uninsulated triangular cavities are formed between the membrane and the external cladding. The latter is a consequence of the diffusion barrier not being sufficiently elastic.

The above-mentioned problems and weaknesses are solved by the present invention.

Summary of the invention

Figure 1 insulated outer wall, 200 mm insulation, diffusion barrier (22) located directly behind interior cladding (10), prior art

Figure 2 insulated outer wall, 200 mm insulation, diffusion barrier (22) and additional insulation (08), 48 mm; the so-called Swedish System, prior art

Figure 3 construction element, simple form

Figure 4 construction element, preferred embodiment with recesses

Figure 5 construction element; preferred embodiment with recesses and concave slant

Figure 6 construction element, preferred embodiment with recesses, side (long base side) view

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Figure 7 junction box, between two construction elements

Figure 8 difference between prior art, with cold bridges and the invention Figure 9 two construction elements, perpendicular to each other; guiding a cable

Reference numbers

01 construction element

02 length

03 height

04 long base edge

05 short base edge

06 slant base edge

07 slant base edge

08 inner insulation / service cavity

09 outer insulation

10 interior cladding

11 recess

12 electric cable

13 junction box

14 longitudinal symmetry plane

15 distance between longitudinal axis 14 and recess 11

16 additional recess; for attachment

17 outer wall

18 siding; outer wall cladding

19 external battens (vertical)

20 protective layer, air barrier, optionally waterproof

21 main framing, stud

22 diffusion barrier

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23 internal battens

24 cavity; cold bridge

25 lateral exit

26 “no cold bridges”, “no cavities”

The aspects of the invention are:

A construction element for peripheral wall constructions, where the construction element is a trapezoidal prism, with a length, a height, long base edge, short base edge, slant base edges, the length is longer than the height, the short side is in the range of the thickness of main framing, preferred 40 to 60 mm, more preferred 45 mm, the long side is approx. 50 to 100 mm, preferred 72 mm, the high corresponds to the thickness of the inner insulation but is maximal 1/3 of the total insulation thickness of the outer wall, preferred 45 mm, made of a highly insulating material, preferred a rigid, high-strength polyurethane foam.

In an embodiment, the construction element is an isosceles, acute, or right, and/or truncated prism with a polygon base, preferred an isosceles, trapezoidal prism, more preferred a truncated, isosceles, trapezoidal prism, the truncation corresponds with the slant base edges of adjacent, for example perpendicular, construction elements.

In an embodiment, the construction element has at least one recess, preferred two recesses, on the long base edge.

In an embodiment, the construction element has two recesses, on the long base edge, adjacent and with a distance to the longitudinal axis, the distance is at least 8 mm, preferred 12 mm, the recesses are arranged symmetrically to the longitudinal axis.

In an embodiment, the recess is semicircular, preferred with a diameter of 16 - 20 mm.

In an embodiment, the construction element has an additional recess, on the long base edge, adjacent to recess, preferred rectangular.

In an embodiment, the recesses accommodate, electric installations, and/or guide installations to the service point.

In an embodiment the recesses may be curved outwards , 90 degree, providing a lateral exit 25, near the end of the construction element, to meet with the recesses of adjacent construction elements, thereby providing a complete cable guiding.

An insulation system for peripheral wall constructions, comprising the construction element according to claims, where the construction element clamps the diffusion barrier against the peripheral wall constructions and forms insulation space between the back

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wall and the diffusion barrier, where insulation is blown in under pressure, unfolding the diffusion barrier foil towards the inner slanted edges of the construction element and towards the interior cladding.

In an embodiment, the insulation system comprises i.a., a blow insulation material, a flexible diffusion barrier, and the trapezoidal construction element.

In an embodiment of the insulation system the construction element comprises at least one recess.

In an embodiment of the system the construction element is attached to the main framing and the diffusion barrier is mounted between the main framing and the construction element.

In an embodiment of the insulation system, the construction elements have concave sloping edges.

In an embodiment of the system, the construction elements have wings, holding the insulation in place when the back plate is removed.

An insulation system for peripheral wall constructions, where construction elements increase the thickness of the insulation in the peripheral wall constructions by clamping the diffusion barrier so that a tightly connected insulation space is formed with a sealing back wall, where the construction elements clamp the diffusion barrier against the peripheral wall constructions, where a tight space is formed between the back wall and the diffusion barrier, where the insulation can be blown in under pressure in a blow-in operation, so that the diffusion barrier foil will unfold towards the inner (concave) slanted edges of the construction elements and towards the interior cladding so that a continuous barrier is formed by the diffusion barrier, which prevents moisture from the inside from penetrating into the insulation, at the same time that the diffusion barrier protects electrical and other technical material which way be installed in the construction elements channels, cavities and recesses.

In an embodiment of the system, the construction elements have concave sloping edges which make it easier for a diffusion barrier to lie close to the sloping edges so that uninsulated cavities outside the diffusion barrier can be avoided.

In an embodiment of the system, the construction elements break thermal bridges in the construction.

In an embodiment of the system, the insulation blasting is carried out in one work operation as it is not necessary to insulate on both sides of the diffusion curtain.

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In an embodiment of the system, the diffusion barrier prevents the insulation from falling out when the interior cladding is removed.

In an embodiment of the system, the construction elements have wings that hold the insulation in place when the back plate is removed.

In an embodiment of the system, the construction elements have recesses for electrical components and grooves for mounting associated pipes and cables.

In an embodiment of the system, the room in which the system is installed can be reinsulated by installing a completely identical construction element system and insulating it with 50 mm insulation.

Detailed description of the invention

The construction element – the invention

Fig. 3 schematically shows the simplest form of the construction element 01, a trapezoidal prism, with a length 02, a height 03, long base edge 04, short base edge 05, slant base edges 06 and 07, where the length 02 is longer than the height 03. The short side 05 is in the range of the thickness of the I-beam and therefore approx. 40 to 60 mm, in the preferred embodiment 45 mm. The long side 04 is approx. 100 to 200 mm, in the preferred embodiment 155 mm, depending on the height 03 and wall construction parameters, like flexibility of the diffusion barrier.

The high 03 is the desired thickness of the inner insulation but is maximal 1/3 of the total insulation thickness (outer insulation 09 inner insulation 08) of the outer wall, in the preferred embodiment the high 03 is 45 mm.

The construction element 01 is made of a highly insulating material able to bear the load of wall construction elements like the interior cladding 10. The preferred material is a rigid, high strength, expanded polystyrene, or polyurethane foam.

The construction element 01 may be, i.a., an isosceles, acute, or right, and/or truncated prism with a polygon base. In the preferred embodiment an isosceles, trapezoidal prism, more preferred a truncated, isosceles, trapezoidal prism, where the truncation is corresponding with the slant base edges 06, 07.

Figure 4 and 5 schematically show the preferred embodiment of the construction element 01. The construction element has at least one recess 11, the preferred embodiment has two. The recess 11 accommodates, for example electric installations (cables 12), and/or

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leads installations to the service point, for example junction box 13. The slant base edges are concave.

The at least one recess is on the long base edge 04. In the preferred embodiment the two recesses are adjacent and with a distance 15 to the longitudinal axis 14. The distance 15 is at least 10 mm, in the preferred embodiment 15 mm. The recess is preferred semicircular and has a preferred diameter of 16 - 20mm. If the construction element 01 has more than one recess 11, the recesses are preferred arranged symmetrically to the longitudinal axis.

In an embodiment, the construction element may have an additional recess 16, a feature for workmanship. The additional recess 16 is on the long base edge 04, adjacent to recess 11, preferred rectangular, and in the size of battens normally used in the constructions of walls.

In an embodiment the recesses may be curved outwards, 90 degree, providing a lateral exit 25, near the end of the construction element, to meet with the recesses of adjacent construction elements (preferred perpendicular), thereby providing a complete cable guiding, as schematically shown in fig. 6, 7, and 9. The junction box 13 situated between two construction elements (01, 01*) and in figure 7 as a simple exemplification, a cable 12 enters the construction element, goes within the recess 11, goes to the junction box 13, connected to other items (not shown), goes out of the junction box, goes within the recess, and leaves the construction element via the lateral exit 25.

In an embodiment, the construction element is a trapezoidal prism, with a length, a height, long base edge, short base edge, slant base edges, the length is longer than the height, where one slant base edge stays perpendicular on the long base edge. Such asymmetric construction elements may be preferably used in the corners (left, right, up, down) of the wall. A professional will understand how to shape the construction element for use in the corners, especially for use on the horizontal ground and top beams.

The system according to the invention – the wall utilizing the construction element

Figure 1 and 2 schematically show a prior art systems – the siding, respectively the exterior cladding 18, the external battens 19, the protective layer 20, the main framing 21, the diffusion barrier 22, the interior cladding 10, and the internal battens 23. Figures 1 and 2 are some of many variations of the prior art. The professional knows many different systems, with double main framing, several protective layers at different positions, vertical and/or horizontal external and/or internal battens, several insulation layers at different positions, different types of main framing (the studs), different types

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of insulation, including blow insulation, and different type of diffusion barrier, including flexible and nonflexible diffusion barriers. In all these known and thinkable systems, the construction element 01 according to the invention is usable.

But in a first aspect of the system according to the invention, the system (the abovementioned known and thinkable systems) utilizing the construction element solves the problem of cold bridges 24, existing cavities, schematically shown in the figure 8.

Figure 8 schematically shows an example, a cross section top view of the completed outer wall 17, using blow insulation. On the left side a system not utilizing the construction element 01.

After blowing in the blow insulation material 09, using a flexible diffusion barrier, an unavoidable cavity 24 arises, resulting in different serious problems. An increasing flexibility of the diffusion barrier is partially minimizing the cavity, but not totally removing the problem.

On the right side figure 8 schematically shows a preferred embodiment, a cross section top view of the completed outer wall 17, using blow insulation, a system utilizing the construction element 01.

After blowing in the blow insulation material 09, using a flexible diffusion barrier, the unavoidable cavity 24 is filled by the construction element, not resulting in a cavity, a cold bridge respectively.

In a second aspect of the system according to the invention, the system (the abovementioned known and thinkable systems) utilizing the construction element solves the above-mentioned problems arising in the use of the service cavity 08 for installations, especially electrical installations, since the electrical installations, the cables 12 are not guided disordered through the battens 23 and the insulation 08, and thereby destroying proper function of the internal insulation 08, but the cables 12 are guided regular and proper in the wall accommodated and guided in the construction element 01.

The construction elements 01 are formed, especially the recesses are formed as described above for example symmetrically, and the truncation is corresponding with the slant base edges 06, 07, for fitting vertical and horizontal construction elements 01, respectively the corresponding recesses 11, to each other in order to guide the cables through the recesses 11 of one construction element 11 to an adjacent construction element.

The invention can also be used for additional insulation in buildings where this system was used during construction. Internal wall cladding can be removed without blown-in insulation falling out of the wall. The diffusion barrier is located under the internal wall

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panel so that it forms a physical barrier that holds the insulation in place. The form of the construction element also hold the insulation in place. After disassembly of the inner plate cladding, the electrical components can be detached from their mounts in the studs. Wires or pipes between the electrical components are pulled out of the recesses in the respective mounting brackets or alternatively out of other components for laying electrical material. Wires and cables are disconnected to the extent that this is considered appropriate for a later reassembly of the system. New construction elements, which are assumed to be identical in shape and size to the existing, are then mounted on the old liners. The diffusion barrier must not be touched and must remain fixed. It will normally be necessary to adjust the length of the top plate and bottom plate designs due to that the interior size of the room is reduced. The electrical components can normally be reassembled if the assembly takes place on the same wall as before. Wiring around an inside or outside corner may require adjustments. Then it is insulated with insulation between the new linings. Finally, the exterior cladding is installed. It shall not be necessary to make other adaptations than width reduction on the internal corner plate.

Claims

349003 16 Claims

1. A construction element (01) for peripheral wall constructions, where the

5 construction element (01) is:

a trapezoidal prism,

with a length (02), a height (03), long base edge (04), short base edge (05), slant base edges (06, 07),

the length (02) is longer than the height (03),

10 the short side (05) is in the range of the thickness of main framing,

preferred 40 to 60 mm, more preferred 45 mm,

the long side (04) is approx. 100 to 200 mm, preferred 155 mm, the high (03) corresponds to the thickness of the inner insulation but is maximal 1/3 of the total insulation thickness of the outer wall, preferred 45 15 mm,

made of a highly insulating material, preferred a rigid, high strength, expanded polystyrene,

wherein the construction element has at least one recess (11), preferred two recesses (11), in the long base side (04), and

20 wherein the recesses may be curved (25) outwards, 90 degree, near the end of the construction element, to meet with the recesses of adjacent, preferred perpendicular, construction elements, thereby providing a complete cable guiding.

2. The construction element (01) of claim 1, where the construction element is: 25 an isosceles, acute, or right, and/or truncated prism with a polygon base, preferred an isosceles, trapezoidal prism, more preferred a truncated, isosceles, trapezoidal prism, the truncation corresponds with the slant base edges (06, 07) of adjacent, preferred perpendicular, construction elements.

30

3. The construction element (01) of claim 1 or 2, where the construction element has:

two recesses (11), in the long base side (04), adjacent and with a distance (15) to the symmetry plane (14), the distance (15) is at least 10 mm, preferred 15 mm, the recesses (11) are arranged symmetrically to the symmetry plane.

35

4. The construction element (01) of the previous claims, where the recess is: semicircular, preferred with a diameter of 16-20 mm.

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5. The construction element (01) of the previous claims, where the construction element (01) has an additional recess (16), on the long base edge (04), adjacent to recess (11), preferred rectangular.

5 6. The construction element (01) of the previous claims, where the recesses (11) accommodate, electric installations (cables 12), and/or guide installations to the service point (13).

7. The construction element (01) of the previous claims, where at least one of the 10 slant base edges (06, 07) are concave, preferred both slant base edges.

8. An insulation system for peripheral wall constructions, comprising the construction element according to the previous claims, where the construction 15 element clamps the diffusion barrier against the peripheral wall constructions and forms insulation space between the back wall and the diffusion barrier, where insulation is blown in under pressure, unfolding the diffusion barrier foil towards the inner slanted edges of the construction element and towards the interior cladding.

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9. Insulation system of a peripheral wall constructions according to claim 9, for minimizing insulation cavities (24), where the system comprises:

i.a., a blow insulation material (09), a flexible diffusion barrier (22), and the trapezoidal construction element (01) according to the claims 1-7.

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10. Insulation system of wall constructions according to claim 10-10, for accommodating installations and/or guiding installations, like cables (12), where the system comprises i.a., the construction element (01) according to the claims 1-7, each comprising at least one recess (11).

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11. Insulation system of peripheral wall constructions according to claim 10-11, where the construction element (01) is attached to the main framing (21) and the diffusion barrier (22) is mounted between the main framing and the construction element.

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12. Insulation system for peripheral wall constructions according to claim 10-11, where the construction elements have concave sloping edges.

13. Insulation system for peripheral wall constructions according to claims 10-12,

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where the construction elements have wings, holding the insulation in place when the back plate is removed.

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