SE464197B - Insulation for house foundations - Google Patents

Abstract

The present invention concerns insulation for house foundations of the type comprising adjacently placed elements consisting of a relatively thin slab and joists attached to this slab and stiffening it, which elements serve as an outer boundary from the surrounding ground. The novel feature is that the outwardly facing slab 1 consists of a stiff cellular plastic material with good ability to withstand mechanical stresses, which slab is connected, by means of securing members engaging with the plastic material, to joists 2 made of wood arranged on the inside of the slab, that at least an upper section of the outwardly facing side of the slab is covered with a grout-like material 3 adhering to the slab, that the elements made up of such a slab and joists are designed to be set up tightly alongside each other to form the outer boundary of the foundation and, resting on longitudinal supports 5, to support the above structure, and that the elements with slabs 1 of cellular plastic material forming the foundation are complemented, for the purposes of heat conservation, by slabs 14 of similar material which are arranged outside the foundation and slope downwards and outwards therefrom to form a screen. <IMAGE>

Description

10 15 20 25 30 35 464 197 2 but at which the disadvantages of the known constructions are eliminated. in An additional purpose is to provide a house foundation with extremely good thermal insulation properties where one also can recover in the ground under the house residual heat.

What characterizes the new insulation is clear from claim 1.

Further developments of the invention appear from the features set out in the subclaims.

Exemplary embodiments of the device according to the invention will be described in more detail below with reference to the accompanying drawing, in which: Fig. 1 shows a schematic cross-section through the base to a building, Fig. 2 on a larger scale shows a modified embodiment of the connection between foundation and base between foundation and flooring, Fig. 3 also shows the application on a larger scale of the invention on a basement ground, and Fig. 4 shows the invention applied on the basis of type plate on ground.

A foundation arranged according to the invention includes a new, special type of elements, which can occur at different heights and widths depending on the area of use.

In the past, in the case of house foundations, basements, walls and the like existing under the ground lots utilized cast-in-place concrete structures and / or elements made of concrete or stone material, blocks or the like, assembled on site with mineral based binders.

In the basis provided according to the invention, jas, on the other hand, as a basic material rigid foam of that type provided, inter alia, under the trade name "Styro- foam ", ie a rigid cell material with small closed cells and very good aging resistance and ability to resist effect of substances present in the soil. The cellular plastic has also great flexural stiffness and also has a good ability to withstand compressive and tensile stresses. 10 15 20 25 30 35 464 197 3 The elements intended for the new foundation consist of a disc 1 with a thickness of the order of 50-60 mm, which disc is permanently attached to the edge of studs 2, for example by means of foamed clamping means driven into the wooden beams or simply by means of corrosion resistant nails or clamping means, which from the outside of the disc 1 white into the wooden bars.

The disc 1 in the example according to Fig. 1, as well as the corresponding discs in the other examples described below, are at least along its upper visible portion provided with a suitably already surface layer 3 of plaster-like type applied during manufacture.

This can consist of essentially conventional plaster, however can also consist of plastic-bonded mineral grains, which give a surface very reminiscent of ordinary plaster, but which is significantly more durable, especially against bending stresses.

The elements, which as a whole are denoted by 4, are set up on a sill 5 of wood, preferably of the wood acacia or similar woods with good ability to withstand fungal attack. The syllen is located in an area, which most difficult to ventilate.

The elements 4 are brought together and connected to each other by means of partly nailed through the regimens arranged next to the disc edges. the joints, after which the required joint sealing can take place.

Fig. 1 shows how a carrying line or beam 6 is placed against the end faces of the element bars 2 to serve as support for floor joists 7 and in this case the joists are 2 shortened in relation to the height of the disc 1, whereby are supported by between or on top of the floor joists spacers.

In the embodiment according to Fig. 2, which is intended for buildings with a crawl space base, the floor joists 7 'are supported by an i the element bars 2 at the intended height recessed support line 6 '.

In the embodiment shown in Fig. 3, where the elements 4 have such height as is required for an existing one under the building basement, the wall formed by the elements 4 is supplemented with internal cladding 8.

In all of the examples shown, a layer 9 is off 10 15 20 25 30 35 464 197 4 discs of the same type as those contained in elements 4 horizontally throughout the crawl space or basement.

In Fig. 3, the layer 9 is covered with a bottom plate 10 of cast concrete that is provided with edge stiffening thicker portions 10 ', which are formed by providing the layer 9 with depressions.

Crucial to the function and especially the thermal insulation the ring is that a "box" of foam material is sounded completely enclose the base both downwards and to the sides.

In the embodiment according to Fig. 1 is, to prevent moisture from the underlying ground to penetrate into the crawl space, a dense, durable foil ll arranged under the foam layer 9. In case of risk of high humidity a heat-exchanging fresh air fan can be arranged in the crawl space 12 at the base.

For all applications, the documentation 13, whereupon the foam is spread, as well as the filling around the the elements or the basement walls must be of drainage and non-capillary suction gravel material.

As shown in the embodiment of Fig. 1, in order to extremely good heat-balanced properties must be achieved, the basis is supplemented by external arrangements more heat insulating sheets 14, which are allowed to stretch a piece obliquely outwards and form a screen. Through this screen prevents frost formation next to the foundation or basement and this causes the temperature difference between out and the inside of the foundation or the basement wall will be considerably lower than if in the usual order frost can form all the way up to the wall.

A consequence of this, of course, is the risk of condensation on the inside of the wall is reduced. The off the screen 14 formed by the discs 14 also means that the risk mined to create deep frost next to and possibly or go under the foundation, and cause lifting with accompanying cracking, which occurs today especially at basement and foundation constructions with excessive interior insulation.

Claims (3)

10 15 20 25 30 464 197 PATENT REQUIREMENTS Insulation for house foundations of the kind comprising adjacent, element-like units consisting of a relatively thin slab and fastening bars attached to it and the slab, which units serve as an external demarcation to the surrounding ground, characterized in that the outwardly facing disc (1) consists of a rigid foam material with good ability to withstand mechanical stresses, which disc is connected by means of fastening means engaging with the plastic material to wooden bars (2) arranged on the inside of the disc, that at least an upper part of the disc outwardly facing side is coated with a plaster-like material (3) adhering to the board, that the elements formed of such board and joists are arranged to be placed close together to form the outer boundary of the foundation and, resting on longitudinal support (5), to support the above building and that the foundation-forming elements with sheets (1) of foam material are supplemented for heat storage purposes m ed outside the base arranged from this obliquely downwardly-outwardly sloping a screen forming discs (14) of similar material. Insulation according to Claim 1, characterized in that a covering layer (9) of sheets of resistant foam material is arranged at a level below the lowest level of the foundation, which layer extends beyond the outer boundary lines of the foundation and serves as a support for the elements of the basic elements intervening beam, sill or similar (5). Insulation according to claim 1, drawing level, a covering layer (9) of discs is provided - of being at a level below the lowest durable plastic material of the foundation, which layer is formed to form in connection with the position of the foundation gutter-like depressions, that on said layer a slab (10) of concrete with so-called edge stiffeners 464 197 6 (10 ') is cast along the position of the foundation and that the sheets (1) of the foundation-forming elements are arranged to connect to the said layers forming the sheets thus forming a coherent layer of foam sheets enclosing both the foundation and the concrete slab from below and from the sides.