FR3002252A1 - INSULATION ASSEMBLY OF A HEATED VANE FLOOR FLOOR - Google Patents

Abstract

Insulating assembly of a floor with beams (2) on crawl space comprising: - a plurality of interjoists (1), whose body is based on a cellular plastic material, adapted to be placed on beams (2 ) and thus allow the formwork of a concrete slab, - a plurality of breakable insulation panels so that the panels can: • form a plurality of insulation elements (7A, 7B) of suitable dimensions to ensure a thermal insulation at the periphery of the floor being arranged on peripheral interjoists (1), and • provide thermal insulation of a wall of slit being arranged against the wall of the slit, under the interjoists (1).

Description

The present invention relates to the field of floors with girders on crawl space, and more particularly to the floors comprising spacers made of cellular plastic material. DESCRIPTION OF THE PREFERRED EMBODIMENTS For good thermal insulation floors crawl space, it is known to place between longitudinal beams, interstices (also called "slabs") of expanded polystyrene, positioned in support on both sides on the latter. The interjoists are aligned longitudinally to fill the entire space between the beams over their entire length. The beams are for example concrete and / or steel. A slab of concrete is then poured on the formwork constituted by the beams and interjoists, so as to form the floor. The interjoists thus form elements of formwork of the concrete while ensuring a good thermal insulation of the obtained floor. The interjoists remain integrated in the structure of the floor. FR-A-2,871,489 describes examples of interwoven formwork floors, expanded polystyrene.

It is also known, to avoid possible thermal losses by "thermal bridge" between the floor and the load-bearing walls, to provide peripheral insulation devices whose height is sufficient so that they are not covered by the slab of concrete. FR-A-2 830 553 describes devices of this type, which are commonly called "longitudinal and transverse thermal bridge correctors". The longitudinal thermal bridge correctors are positioned in banks parallel to the beams, while the correctors of transverse thermal bridges are disposed abut of floor, perpendicular to the beams.

In the case of floors on crawl space, it is also known from FR-A-2 947 580 to provide interjoists provided with an insulating skirt of the wall walls (intermediate load-bearing walls of a floor on a crawl space), to reduce thermal bridges.

Nevertheless, these solutions are costly because they require interjoists with skirts specific to each type of joists, and increase the number of distinct references of insulating elements of the floor. The invention aims to provide a beam floor on crawl space whose cost of manufacture is controlled and which offers very good thermal insulation performance. For this purpose, the subject of the invention is an assembly for isolating a floor with beams on a crawl space comprising: a plurality of interjoists, the body of which is based on a cellular plastic material, adapted to be laid down on beams and thus allow the formwork of a concrete slab, - a plurality of insulating panels breakable from precut lines so that the panels can: - form a plurality of insulating elements of dimensions suitable for providing thermal insulation at the periphery of the floor being arranged on peripheral interjoists, and - providing thermal insulation of a wall of slit being arranged against the wall of the slit under the interjoists.

Thanks to the invention, it becomes possible to build a beam insulating floor in a simple manner, thanks to a small number of parts and easy implementation, while limiting the cost of insulation devices, and therefore, the cost of the floor. Moreover, this solution makes it possible to manage the false distances, i.e. a variation of distance between the beam and the wall. According to particular embodiments, the insulation assembly comprises one or more of the following characteristics, taken in isolation or in any technically possible combination: at least one of said panels is breakable from lines precutting device for forming longitudinal thermal bridge correctors intended to be arranged on the end interjoists arranged between the end beams and the corresponding wall; at least one of said panels is breakable from precut lines to form transverse thermal bridge correctors, intended to be arranged on the end interjoists of the spans between beams, in the direction perpendicular to the beams; - At least one of said panels is breakable from pre-cut lines delimiting a complementary interlocking relief of a corresponding relief surface interjoists, preferably delimiting clipping reliefs; the panels are based on cellular plastic material, preferably based on expanded polystyrene (EPS). According to another aspect of the invention, the invention relates to a method of manufacturing an insulation assembly of a floor with girders on crawl space as described above, wherein at least several said panels are obtained by cutting in the same block of cellular plastic material. Preferably, the panels are pre-cut so as to be scored. Another aspect of the invention relates to a method of constructing a floor with girders on a crawl space comprising a step of placing interjoists resting on beams to form a formwork of a slab, the method comprising in in addition to the use of identical insulation boards and breakable from pre-cut lines for-prior to the establishment of interjoists, set up some of said insulation panels against a crawl wall crawl space; 25 - cutting, for example by breaking, insulating members forming thermal bridge correctors longitudinal or transverse from at least one of said panels, along precut lines; placing said insulation elements on peripheral interjoists to reduce longitudinal or transverse thermal bridges. The method comprises a subsequent step of pouring a concrete slab or the like onto the formwork thus formed, said longitudinal and / or transverse insulating elements not being covered by the slab.

The invention will be better understood on reading the following description, provided solely by way of example, and with reference to the appended drawings, in which: FIG. 1 is an overall perspective view illustrating a floor on a crawl space comprising interjoists placed on beams, before pouring a concrete slab; - Figure 2 is a similar view of the floor during the casting of the slab; FIGS. 3A and 3B are perspective views respectively illustrating a pre-cut panel according to the invention, as well as the sections obtained after separation by rupture and possible transverse cutting of the sections for FIG. 3A, and a panel according to a variant of FIG. invention with IC precut lines in Figure 3B; - Figure 4 is a side perspective view of a wall of shear on which are arranged insulation panels on either side; - Figure 5 is a partial front perspective view of a wall slit after laying insulation panels on each side, laying beams, and poses interjoists; FIG. 6 illustrates a manual rupture operation of sections of the panels of FIGS. 3A and 3B according to the precut lines provided in the panel; - Figure 7 is a schematic perspective view illustrating the attachment of sections from a pre-cut panel and forming thermal bridge correctors, interjoists abutting floor; and FIG. 8 is a partial schematic perspective view illustrating interjoists arranged on beams. For more readability, the reference numbers have not been included in all the drawings. As illustrated in FIG. 1, interjoists 1 based on cellular plastic material, for example expanded polystyrene (EPS), are used to produce floors, especially lower floors on a crawl space. For this purpose, the interjoists 1 rest between parallel beams 2 forming a support, which are for example concrete with wire mesh (Figures 1, 2, 6 and 7) or prestressed concrete (Figure 8), in a known manner . The interjoists 1 are supported at their opposite lateral ends on two adjacent beams 2 or, at the periphery of the floor, on a beam and the basement wall. They are aligned to fill the space between the beams 2 and thus form with them a formwork on which a slab (Figure 2), for example concrete, is then cast. Alternatively, the material of the slab is not a concrete. In general, the slab is in a material of any suitable type, for example, an anhydrite slab. Entrevous 1 are intended not to be removed. They contribute to the thermal insulation of the floor, which thus includes interjoists 1, support beams 2 and the slab. The interjoists thus form an assembly of insulation and formwork for floor, especially for floor space crawl space. According to the invention, the insulation assembly is particular in that it comprises, in addition to the interjoists 1, insulation panels 3 (see FIGS. 3A and 3B). And these insulation panels 3 are further particular in that they are scored so as to be able to form both the insulation panels of the walls of the wall (used in full - Figures 4 and 5) and bridge correctors thermal longitudinal or transverse (Figures 1, 2 and 7, after rupture -figure 6- according to the pre-cuts of the insulation panels 3) being fixed surface interjoists 1.

We will now describe the panels 3 and their implementation in detail. The interjoists 1 are described below. Figures 3A and 3B illustrate examples of possible breakable panels.

In FIG. 3A, the panels 3 have pre-cut lines 4 produced in the factory. The precut lines 4 form open and non-through slots. - 6 - Note that throughout the text, "slot" means a notch made in the support. In all cases, the length of the notch is much greater than its width. "Open slot" means an unfilled slot, ie no insert is present in the slot or, if an insert partially fills the slot, only the open slot is considered to be part of the slot. remaining of the slot. The precut lines 4 preferably extend over the entire length of the panel. They also preferably have a constant depth. In Figure 3B, the precut lines 4 also extend over the entire length of the panels 3 with a constant depth. However, each precut line 4 draws, in addition to open and non-through slots, a Q. The IC forms a clipping groove 5 in the upper section (with reference to FIG. 3B), and by complementarity of form, a bead 6 protruding into the lower section. As a variant, the pre-cut lines 4 have a profile of any type adapted to form complementary male and female members in shape in each of the sections 7 of the panel 3 obtained after breaking along the precut lines 4. In general, the male and female organs have complementary clipping profiles. More specifically, the female members are preferably grooves, and preferably have a narrowed mouth. These grooves are intended to allow the attachment of cut sections on complementary male reliefs provided on the interjoists 1. Note that alternatively, the male organs interjoists do not have a shape complementary to the female members of the cut sections of the panels but a form of any type suitable for clipping into the female members of the latter. In general, the precut lines 4 may have a shape of any type suitable for forming one or more clipping members.

In a general manner also, the panels 3 are based on cellular plastic material, preferably expanded polystyrene (EPS). They are for example only made of cellular plastic material, as shown in Figures 3A and 3B. But alternatively, they include, for example, reinforcing elements or inserts of any type suitable as a plasterboard or a paper web. More generally, they are based on a cellular plastic material and optionally include additional insulation elements. In addition, the panels 3 are not necessarily based on a single cellular plastic material. They are for example composed of two cellular plastic materials, for example white EPS and gray EPS or other materials of any suitable type. In the case of bi-material panels, the arrangement of the different materials is for example provided such that each section 7 obtained by breaking along the precut lines 4 is bi-material and identical to the other sections 7. We are now going describe the implementation of panels 3 on site. As illustrated in FIGS. 4 and 5, the panels 3, ie not truncated, are arranged against a wall of slit 8, under the interjoists 1 at the end of the span, for example at a height of 500 mm, or at another height. of any suitable type. The panels 3 are placed on either side of the slit wall 8 and arranged next to one another in a contiguous manner, so that the upper part of the slit wall 8 is entirely covered with insulation. The panels 3 are also contiguous with the lower faces of the interlocks 1 (Figure 4). The panels 3 have a rectangular parallelepiped shape. As a variant, however, they have an outline of any suitable type and have, for example, rounded edges. The fixing of the panels 3 on the slitting walls 8 is for example made by gluing, by pinning, or by any other means of any suitable type.

As illustrated in FIG. 6, in order to form "longitudinal and transverse thermal bridge correctors", the panels 3 are broken (or cut off) using the precut lines 4 for initiation. The sections 7 obtained form the said thermal bridge correctors.

As illustrated in FIGS. 1 and 2, the spans between beams 2 are filled with interjoists 1 and the interjoists 1 situated at the floor periphery, ie the end interjoists, are provided on their upper face with the sections 7 described above obtained. by breaking in the panels 3.

These sections 7 are for example cross-cut transversely in their length to have a length corresponding to the upper face of interjoists, as shown in Figure 3A and form either transverse thermal bridge correctors 7A or longitudinal thermal bridge correctors 7B.

The sections 7 or 7A "transverse thermal bridges 7A and longitudinal 7B illustrated in Figures 1 and 2 have a height sufficient to not be covered by the concrete slab after casting. The interjoists 1 are preferably covered by at least 4 cm of concrete.

The transverse "thermal bridge correctors" 7A are arranged on interjoists abut of span. As illustrated in Figure 7, they are for example nailed in interjoists 1 by means of nails 9 called "fir", i.e. delimiting arrow edges whose profile allows the insertion of the nail but prevents its removal.

As can be seen in FIGS. 1 and 2, the insulation along the longitudinal banks is made by arranging the sections 7B cut at regular intervals on the interjoists 1 of banks parallel to the beams 2, so as to form "correctors of longitudinal thermal bridges ".

Whether they are "correctors of transverse or longitudinal thermal bridges" 7A and 7B, they are fixed by any means on the interjoists 1. For example, they are nails 9 having so-called fir-shaped reliefs illustrated in the figure 7. It is a variant of nails of any suitable type. As a variant also, the sections 7A and 7B are glued on the interjoists 1. The spaces between the longitudinal and transverse thermal bridge correctors 7A, 7B allow the passage of concrete on either side of said correctors. Thus, in general, according to the invention, there is provided an assembly for isolating a floor with beams on a crawl space comprising: a plurality of interjoists 1, the body of which is based on a cellular plastic material , adapted to be placed on beams 2 and thus allow the formwork of a concrete slab, - a plurality of insulating panels 3 breakable so that the panels can: - form a plurality of insulation elements 7A , 7B of appropriate dimensions to ensure thermal insulation at the floor periphery being arranged on peripheral interjoists 1, and - to provide thermal insulation of a wall of slit 8 being arranged against the wall of slit 8, under the interjoists 1 .

The interjoists 1 themselves will now be described in more detail as an illustrative and non-limiting example. Figure 8 illustrates in more detail a cross section of a interjoists 1, which in this example has a constant cross section over its entire length. It is indeed an intervous formed by cutting in a block of cellular plastic material or by molding during expansion of the polystyrene. The beams 2 are also here prestressed concrete. If the interjoists 1 is formed by molding, its cross sections may for example be different.

The interjoists 1 forming the floor are identical and only one of them is described. Note, however, that the interjoists 1 located at the longitudinal ends of a span of interjoists 1 can of course be truncated or rabbets.

The interjoists 1 is of cellular plastic material, that is to say that its body is made of cellular plastic material, which does not exclude the presence of other materials reported on or present in the interjoists 1. The 1 is defined by an upper face 10A, an opposite lower face 10B and four faces 10C, 10D, 10E, 10F joining the upper face 10A and the lower face 10B, including two opposite lateral faces 10C, 10D and two opposite transverse faces 10E , 10F. The faces 10A, 10B, 10E and 10F generally have a geometry of any suitable type.

The interjoists present at each lateral end a lateral spoiler 12 bearing on a beam 2. The corresponding lateral face 10C, 10D, delimits the lateral spoiler 12. In the remainder of the description, "the spoiler" refers to each spoiler. or the only spoiler if there is only one.

The spoiler 12 illustrated extends over the entire length of the interjoists 1. Note that we do not take into account, for the length of the interjoists 1, possible male reliefs present at the longitudinal ends to fit with the adjacent interjoists. The spoiler 12 has a contour of any type suitable for a bearing on the beam 2. In its lower part, the interjoists 1 further has a lower tongue 24 projecting laterally relative to the side spoiler 12, and intended to be inserted under the support beam 2 on which said lateral spo comes to bear, as shown in Figure 8.

The tongue 24 provides the insulation under the beam 2. The lower face 24B of the tongue 24 extends the lower face 10B of the central portion of the interjoists 1, which is flat. Alternatively, the interjoists do not have tab 24. The body of the interjoists 1 is made of expanded polystyrene (EPS). More generally, it is a material of cellular plastic material of any suitable type. In general, the cellular plastic material has a density of between 10 and 50 kg / m 3.

Another aspect of the invention relates to a method of manufacturing the panels described above, wherein at least several said panels 3 are obtained by cutting in the same block of cellular plastic material.

Preferably, the cutting of the panels 3 in a block and the precut lines 4 in the panels 3 are made by means of son, for example hot son. Another aspect of the invention further relates to the method of construction of the floor with girders on crawl space described above.

To do this, some of the panels are overflowing fixed against each face of the slitting walls 8, immediately below the level of interjoists 1. The beams 2 are then arranged in support of the ends on the basement walls and / or slit 8. The Entrevous 1 are arranged in the spans between the beams 2 or between the end beams 2 and the walls, adjoiningly. The correctors of thermal bridges 7A, 7B are obtained by breaking in the panels 3, taking as primer the precut lines 4, and then transverse cutting of the sections 7, for example with a saw. The transverse thermal bridge correctors 7A are fixed on the interjoists 1 floor abutment perpendicular to the beams 2, and the longitudinal thermal bridge correctors 7B are fixed parallel to the beams 2 and spaced regularly as described above. Thus, in general, the method of building the floor comprises a step of placing interjoists 1 resting on beams 2 to form a formwork of a slab, the method further comprising the use of panels 3 identical breakable insulation for: -previously to the establishment of interjoists 1, put in place some of said insulation panels 3 against a wall slit 8 crawl space; obtaining, for example by breaking them, insulating elements forming longitudinal thermal bridge correctors 7B or transverse 7A from at least one of said panels 3, along precut lines 4; - Placing said insulators 7A, 7B on interjacent devices 1 to reduce longitudinal or transverse thermal bridges. Finally, the method comprises a subsequent step of casting a concrete slab or the like on the formwork thus formed, said longitudinal insulating elements 7B and / or transverse 7A not being covered by the slab.

Claims (9)

REVENDICATIONS1. Insulating assembly of a floor with beams (2) on crawl space comprising: - a plurality of interjoists (1), whose body is based on a cellular plastic material, adapted to be placed on beams (2 ) and thus allow the formwork of a concrete slab, - a plurality of insulating panels (3) breakable from precut lines (4) so that the panels (3) can: - form a plurality of insulation elements (7A, 7B) of suitable dimensions to provide thermal insulation at the floor periphery by being arranged on peripheral interjoists (1), and - to provide thermal insulation of a wall of partition (8) by being arranged against the wall of slit (8), under the interjoists (1). An insulation assembly according to claim 1, wherein at least one of said panels (3) is breakable from precut lines (4) to form longitudinal thermal bridge correctors (7B) to be arranged on end interjoists arranged between the end beams (2) and the corresponding wall. An insulation assembly according to claim 1 or 2, wherein at least one of said panels (3) is breakable from precut lines (4) to form transverse thermal bridge correctors (7A) for be placed on end interjoists between beams between beams in the direction perpendicular to the beams. 4. Insulating assembly according to any one of the preceding claims, wherein at least one of said panels (3) is breakable from precut lines (4) delimiting a complementary interlocking relief (5) of a corresponding relief (6) surface interjoists (1), preferably delimiting clipping reliefs. An insulation assembly according to any one of the preceding claims, wherein the panels (3) are based on cellular plastic material, preferably based on expanded polystyrene (EPS). 6. A method of manufacturing an insulation assembly of a floor with girders on crawl space according to any one of the preceding claims, wherein at least several said panels (3) are obtained by cutting in the same block of material cellular plastic. 7. The method of claim 6, wherein the panels (3) are pre-cut so as to be scored. 8. A method of constructing a floor with girders on crawl space comprising a step of placing interjoists (1) resting on beams (2) to form a formwork of a slab, the method further comprising: the use of insulating panels (3) which are identical and divisible from precut lines for prior to the installation of interjoists (1), to put in place some of said insulating panels (3) against a wall of slits (8) crawl space; cutting, for example by breaking them, insulating members forming longitudinal (7B) or transverse (7A) thermal bridge correctors from at least one of said panels (3), along precut lines (4); ); - Placing said insulation elements (7A, 7B) on peripheral interjoists (1) to reduce the longitudinal or transverse thermal bridges. 9. The method of claim 8, comprising a subsequent step of pouring a concrete slab or the like on the formwork thus formed, said longitudinal insulating elements (7B) and / or transverse (7A) not being covered by the slab.30