CONSTRUCTION SHEET

Abstract

The invention relates to a construction sheet, in particular sub-roof sheet (1), in particular intended for use as an underlay sheet, preferably formwork sheet, and/or roof seal sheet, and/or facade sheet, with at least one carrier layer (2) designed as fire protection layer and at least one further layer (3), wherein the further layer (3) is designed as a further fire protection layer.

Claims

1. A construction sheet, in particular sub-roof sheet, in particular intended for use as an underlay sheet, preferably formwork sheet, and/or roof seal sheet, and/or facade sheet, with at least one carrier layer designed as fire protection layer and at least one further layer, wherein the further layer is designed as a further fire protection layer.

2. The construction sheet according to claim 1, wherein the construction sheet and/or the carrier layer and/or the further layer is designed to be flame-retardant and/or non-combustible according to DIN 4102-1 (as of August 2019) and/or according to EN 13501-1(as of August 2019), and/or in that the construction sheet and/or the carrier layer and/or the further layer is fire-retardant with a fire resistance class of F30 and/or highly fire-retardant with a fire resistance class of F60 according to DIN 4102-2 and/or according to EN 13501-2 (as of August 2019) and/or comprises a fire resistance of Class A according to ASTM E108, especially ASTM E108-17 (as of August 2019).

3. The construction according to claim 1, wherein the carrier layer comprises a textile sheet fabric, especially wherein the carrier layer comprises and/or consists of a glass fiber fabric, carbon fiber fabric, ceramic fiber fabric, silicon fiber fabric, polycarbon fiber fabric and/or metal fiber fabric, and/or in that the carrier layer comprises at least one nonwoven, wherein the nonwoven comprises and/or consists of mineral fibers, aramid fibers, thermoplastic fibers, preferably high-temperature thermoplastic fibers and/or fibers made of thermally treated thermoplastics, glass fibers and/or rock wool fibers, and/or in that the carrier layer comprises glass fibers, carbon fibers and/or rock wool and/or consists thereof and/or is designed as a glass fiber mat and/or carbon fiber mat, and/or in that the carrier layer comprises, in particular oxidized, polyacrylonitrile fibers and/or consists thereof.

4. The construction sheet according to claim 1, wherein the further layer is designed as a coating, in particular wherein the coating is applied to the carrier layer at least on one side, preferably on both sides, and/or wherein the further layer is designed as a lacquer layer and/or as an extruded layer.

5. The construction sheet according to claim 1, wherein the further layer formed as a coating is manufactured on the basis of an, especially aqueous, acrylate dispersion and/or in that the further layer formed as a coating comprises acrylates, especially methacrylates, butyl acrylates, alklyl methacrylates, ethyl acrylates and/or poly acrylates, and/or consists thereof, in particular wherein the further layer is designed to be unfoamed and/or free from hydrophobic additives and/or is designed to be diffusion-retardant and/or diffusion-barrier.

6. The construction sheet according to claim 1, wherein the further layer comprises filler particles, especially inorganic filler particles, in particular wherein the filler particles are mineral filler particles, preferably quartz grains and/or mineral grains, and/or in particular wherein the filler particles comprise exfoliated graphite as material and/or consist thereof and/or in particular wherein the filler particles comprise at least a proportion of at least 30% by weight, preferably at least 40% by weight, even more preferably at least 50% by weight and in particular of at least 60% by weight %, with particles of an average particle size and/or particle size between 0.01 and 5 mm, preferably between 0.02 and 3 mm, further preferably between 0.03 and 2 mm, preferably between 0.05 and 1 mm, in particular wherein at least one further proportion of further particles is provided, wherein the further particles comprise a particle size which is larger than the average particle size of the particles.

7. The construction sheet according to claim 1, wherein the further layer comprises a scattering layer, preferably by means of a sanding, especially wherein the scattering layer comprises the filler particles and/or the scattering layer has been manufactured on the further layer, especially by scattering the filler particles on the, especially moist and/or uncured, outer surface of the further layer.

8. The construction sheet according to claim 1, wherein the layer thickness of the carrier layer is designed to be greater, preferably greater than 20%, even more preferably greater than 50%, even more preferably between 65% to 200% greater, than the layer thickness of the further layer, or in that the layer thickness of the further layer is greater, preferably greater than 20%, even more preferably greater than 50%, even more preferably between 65% and 200% greater, than the layer thickness of the carrier layer.

9. The construction sheet according to claim 1, wherein the further layer is connected, in particular glued and/or positively bonded, to the carrier layer, preferably directly, and/or in that the further layer is applied to the outside of the carrier layer at least on one side, preferably on both sides, and/or in that the further layer is applied and/or arranged on the carrier layer over part and/or all of its surface.

10. The construction sheet according to claim 1, wherein the further layer is designed as a, preferably diffusion-tight, metal layer, in particular wherein the metal layer is a metal coating of the carrier layer via metal vapor deposition and/or wherein the metal layer is applied directly to the carrier layer.

11. The construction sheet according to claim 1, wherein the construction sheet and/or the further layer is designed to be slip-resistant on at least one outer side, in particular wherein the slip-resistant surface of the construction sheet and/or the further layer is designed to be roughened and/or rough and/or surface-structured and/or comprises a rough and/or uneven surface structure due to the scatter layer and/or the filler particles.

12. The construction sheet according to claim 1, wherein the construction sheet comprises a low fire load with an energy content below 400 MJ/m.sup.2, preferably below 200 MJ/m.sup.2, even more preferably between 1 to 100 MJ/m.sup.2, even more preferably between 5 to 80 MJ/m.sup.2 and especially at least substantially less than or equal to 10.5 MJ/m.sup.2, and/or in that the carrier layer and/or the further layer and/or the construction sheet is temperature-resistant and/or temperature-stable up to at least 450° C., preferably at least 600° C., even more preferably at least 800° C.

13. The construction sheet according to claim 1, wherein the construction sheet is designed to be resistant against treading, preferably by means of at least one inorganic and/or organic lattice and/or fabric, and/or tear-resistant, preferably by means of a preferably reinforced film layer, in particular one that is vapor- and/or wind-blocking and/or comprises metal and/or plastic and/or consists thereof.

14. The construction sheet according to claim 1, wherein the construction sheet comprises at least on one side, preferably on both sides, on the outside at least one adhesive layer for adhesive bonding, preferably for seam self-adhesion, of neighboring sub-roof sheets, in particular wherein the adhesive layer is covered with a liner and/or wherein the adhesive layer is formed over part of the surface, preferably in strip form, and is provided on at least one longitudinal edge of the construction sheet and/or wherein the adhesive layer extends at least substantially over the entire surface of at least one outer side of the sub-roof sheet and/or wherein the adhesive layer is flame-retardant or fire-retardant, preferably with a fire resistance class of F30, and/or highly fire-retardant with a fire resistance class F60 according to DIN 4102-2 (as of August 2019) and/or according to EN 13501-2 (as of August 2019).

15. The construction sheet according to claim 1, wherein the construction sheet comprises a monitoring device and/or a monitoring device is associated to the construction sheet, especially wherein the monitoring device comprises at least one measuring device, especially a smoke detector and/or heat detector, for detecting a fire and/or wherein the monitoring device comprises at least one alarm device for emitting an alarm signal.

16. The construction sheet according to claim 1, wherein the carrier layer and/or the further layer and/or the construction sheet is designed to be water-repellent and/or waterproof, preferably with a water column of 0.5 to 50 m, preferably between 0.8 to 40 m, even more preferably between 0.9 to 30 m, and/or in that the carrier layer and/or the further layer and/or the sub-roofing sheet is designed as a vapor barrier, preferably water vapor retarding with a water vapor diffusion equivalent air layer thickness between 0.5 to 1500 m, preferably between 10 and 1500 m, even more preferably between 100 and 1500 m, and/or is designed as a vapor block, preferably water vapor block with a water vapor diffusion equivalent air layer thickness greater than 1500 m and/or in that the carrier layer and/or the further layer and/or the building sheet is designed to be open to diffusion, preferably permeable to water vapor, with a water vapor diffusion-equivalent air layer thickness of between 0.01 and 1 m, preferably between 0.02 and 0.5 m, even more preferably between 0.03 and 0.3 m, and in particular at least substantially less than or equal to 5 cm.

17. The construction sheet according to claim 1, wherein the construction sheet comprises at least one, preferably waterproof, functional layer, in particular wherein the functional layer is designed as a microporous membrane layer and/or a monolithic membrane layer and/or wherein the functional layer comprises as material a plastic, preferably based on polyolefinic plastic and/or thermoplastic polyurethane, and/or a polyacrylate, and/or consists thereof.

18. The construction sheet according to claim 1, wherein the further layer has been manufactured in an extrusion process, preferably with a material comprising and/or consisting of, in particular, molten thermoplastic synthetic material, and/or in that the further layer comprises and/or consists of a thermoplastic synthetic material, preferably thermoplastic polyurethane, as material, especially wherein the thermoplastic synthetic material of the further layer has been extruded onto the carrier layer.

19. The use of a construction sheet according to claim 1, wherein a fire-retarding device in a roof structure and/or in a building, preferably for increasing the fire protection of a structure, preferably a pitched roof of the structure, in particular wherein the construction sheet is provided for fire-retarding a fire originating and/or available on the outside of the roof.

Description

[0122] It shows:

[0123] FIG. 1 a schematic cross-sectional view of a sub-roof sheet according to the invention,

[0124] FIG. 2 a schematic cross-sectional view of a further embodiment of a sub-roof sheet according to the invention,

[0125] FIG. 3 a schematic cross-sectional view of a further embodiment of a sub-roof sheet according to the invention,

[0126] FIG. 4 a schematic cross-sectional view of a further embodiment of a sub-roof sheet according to the invention,

[0127] FIG. 5 a schematic cross-sectional view of a further embodiment of a sub-roof sheet according to the invention,

[0128] FIG. 6 a schematic cross-sectional view of a further embodiment of a sub-roof sheet according to the invention,

[0129] FIG. 7 a schematic cross-sectional view of a further embodiment of a sub-roof sheet according to the invention,

[0130] FIG. 8 a schematic cross-sectional view of a further embodiment of a sub-roof sheet according to the invention,

[0131] FIG. 9 a schematic illustration of a monitoring device according to the invention,

[0132] FIG. 10 a schematic cross-sectional view of a further embodiment of a sub-roof sheet according to the invention, and

[0133] FIG. 11 a schematic cross-sectional view of a further embodiment of a sub-roof sheet according to the invention.

[0134] The description of the figures refers to a sub-roof sheet 1. However, according to the invention, it is understood that the explanations for the sub-roof sheet 1 can also apply in the same way to a construction sheet, preferably a facade sheet.

[0135] FIG. 1 shows a sub-roof sheet 1 with at least one carrier layer 2 designed as a fire protection layer and at least one further layer 3, wherein the further layer 3 is designed as a further fire protection layer.

[0136] It is not shown that the sub-roof sheet 1 can also comprise a plurality of carrier layers 2.

[0137] FIG. 5 shows that the sub-roof sheet 1 can comprise a plurality—in the embodiment shown, two—of further layers 3.

[0138] In the case of a plurality of further layers 3, it may be envisaged that the further layers 3 are identical in construction or are designed differently from one another.

[0139] In the state of use, the sub-roof sheet 1 is arranged especially on and/or in the roof structure in such a way that preferably the further layer 3 is directed outwardly and/or faces the weather. The carrier layer 2 can thereby face the inside of the building.

[0140] The further layer 3 especially ensures fire protection, wherein fire effects from outside can be delayed. A design of the further layer 3 as a fire protection layer is to be understood in such a way that the further layer 3, but also preferably the carrier layer 2, is used to increase the fire protection and can further lead to a delay of the fire propagation and/or the transmission of the fire in case of fire.

[0141] It is not shown that the sub-roof sheet 1 is intended for use as a underlay sheet, preferably a formwork sheet, and/or a roof seal sheet.

[0142] In the embodiment shown in FIG. 1, the sub-roof sheet 1 and the further layer 3 are designed to be flame-retardant in accordance with DIN 4102-1 and EN 13501-1. In other embodiments, the carrier layer 2 may also be flame-retardant and/or non-combustible in accordance with the aforementioned standards. FIG. 2 shows that the further layer 3 is designed as a non-combustible layer, wherein it comprises building material class A2 according to DIN 4102-1.

[0143] The sub-roof sheet 1 shown in FIG. 2 is fire-retardant with a fire resistance class of F30 in accordance with DIN 4102-2 and EN 13501-2.

[0144] The sub-roof sheet 1 shown in FIG. 4 is designed with the carrier layer 2 and the further layer 3 to be highly fire-retardant with a fire resistance class of F60 in accordance with

[0145] DIN 4102-2 and EN 13501-2.

[0146] The sub-roof sheet 1 shown in FIG. 3 in turn comprises a Class A fire resistance according to ASTM E108, especially according to ASTM E108-17. In further embodiments, the carrier layer 2 and/or the further layer 3 can be fire-retardant with a fire resistance class of F30 or highly fire-retardant with a fire resistance class of F60.

[0147] The carrier layer 2 shown in FIG. 1 is designed as a textile fabric. In further embodiments, the carrier layer 2 may comprise a textile fabric. The textile sheet fabric may be composed of glass fiber fabric, carbon fiber fabric, ceramic fiber fabric, silicon fiber fabric, polycarbon fiber fabric and/or metal fiber fabric. Especially, the material of the carrier layer 2 is selected such that the carrier layer 2 is designed to be flame-retardant and/or non-combustible and/or fire-retardant and/or highly fire-retardant.

[0148] In the embodiment shown in FIG. 2, it is provided that the carrier layer 2 comprises at least one nonwoven. The nonwoven may comprise and/or consist of mineral fibers, aramid fibers, thermoplastic fibers and/or glass and/or rock wool fibers. Thermoplastic fibers can especially be high-temperature thermoplastic fibers and/or fibers made of thermally treated thermoplastics.

[0149] The carrier layer 2 shown in FIG. 3 is designed as a glass fiber mat.

[0150] In further embodiments, the carrier layer 2 may comprise glass fibers, carbon fibers and/or rock wool and/or be designed as a carbon fiber mat.

[0151] Especially, in even more preferably embodiments, it may be provided that the carrier layer 2 comprises and/or consists of polyacrylonitrile fibers (PAN fibers), in particular oxidized polyacrylonitrile fibers.

[0152] In the embodiment shown in FIG. 1, the further layer 3 is designed as a coating. In the embodiment shown in FIG. 1, the coating is coated on one side of the carrier layer 2.

[0153] It is not shown that the further layer 3 is designed as a coating layer.

[0154] FIG. 5 shows that the further layer 3 formed as a coating is coated on both sides of the carrier layer 2.

[0155] The further layer 3 formed as a coating can be manufactured on the basis of an acrylate dispersion, especially an aqueous one. Especially the acrylate dispersion can comprise acrylates, in particular methacrylates, butyl acrylates, alklyl methacrylates, ethyl acrylates and/or polyacrylates and/or consist thereof.

[0156] It is not shown that the further layer 3 is designed to be unfoamed and/or free of hydrophobing agent additives (free of an additional hydrophobing agent layer).

[0157] The further layer 3 shown in FIG. 1 is designed to be diffusion-barrier.

[0158] FIG. 2 shows that a diffusion-blocking further layer 3 is provided.

[0159] FIG. 2 further shows that the further layer 3, which is designed as a coating in the example shown, comprises filler particles 4. Especially inorganic filler particles 4 are provided. Mineral filler particles 4, such as quartz grains and/or mineral grains, can be used as filler particles 4.

[0160] Not shown is that the filler particles 4 comprise at least a proportion of 30% by weight, preferably of at least 40% by weight, even more preferably of at least 50% by weight, in particular of at least 60% by weight, with particles of an average particle size or particle size between 0.01 and 5 mm. In further embodiments, the particle size may be between 0.05 to 1 mm. Especially wherein a further proportion of further particles (filler particles 4) is provided, wherein the further particles of the filler particles 4 comprise a particle size larger than the mean particle size of the particles 4.

[0161] For example, fine sand and/or very fine-grained sand can be used as filler particles 4.

[0162] It is not shown that in an even more preferably embodiment exfoliated graphite is provided as material for the filler particles 4 and/or the filler particles 4 comprise or consist of exfoliated graphite.

[0163] FIG. 3 shows that the further layer 3 comprises a scattering layer 5. In the embodiment shown, the scattering layer 5 comprises filler particles 4. The further layer 3 can merge directly into the scattering layer 5. In the embodiment shown, the scattering layer 5 has been manufactured by a sprinkling of the further layer 3. Inorganic filler particles 4, especially mineral filler particles 4, can be used as filler particles 4. Especially quartz grains and/or mineral grains are provided as filler particles 4 of the scattering layer 5.

[0164] It is not shown that the scattering layer 5 has been manufactured by scattering the filler particles 4 onto the, especially moist and/or uncured, outer surface of the further layer 3.

[0165] FIG. 4 shows that the filler particles 4 are provided in the scattering layer 5. Further filler particles 4 are provided in the further layer 3, which is designed as a coating and has been manufactured on the basis of an especially aqueous acrylate dispersion. The scattering layer 4 may thereby have been manufactured by sanding the further layer 3, wherein the coating of the further layer 3 may already have comprised the filler particles 4 during the application to the carrier layer 2. Thus, the filler particles 4 of the further layer 3 may be provided not only in the scattering layer 5, but also in the layer structure of the further layer 3.

[0166] In the embodiments according to FIGS. 1 to 6, it is provided that the layer thickness 6 of the carrier layer 2 is designed to be greater than the layer thickness 7 of the further layer 3. Especially the layer thickness 6 of the carrier layer 2 can be designed to be at least 20%, in particular between 65% and 200%, greater than the layer thickness 7 of the further layer 3.

[0167] FIGS. 10 and 11 show that the layer thickness 6 of the carrier layer 2 is designed to be smaller than the layer thickness 7 of the further layer 3. Especially the layer thickness 7 of the further layer 3 can be designed larger than the layer thickness 6 of the carrier layer 2 by at least 20%, in particular between 65% and 200%.

[0168] FIG. 10 corresponds in particular to the embodiment shown in FIG. 1, wherein a change in the layer thicknesses 6, 7 is provided opposite thereto. FIG. 11 corresponds at least essentially to the embodiment shown in FIG. 4, wherein the ratio of the layer thicknesses 6, 7 is also designed differently.

[0169] It is not shown that the carrier layer 2 comprises a grammage between 20 and 2000 g/m.sup.2, in particular between 40 and 400 g/m.sup.2.

[0170] In the embodiments shown, it is provided that the further layer 3 is directly connected to the carrier layer 2. The connection of the carrier layer 2 to the further layer 3 may involve adhesive bonding and/or a form-fit connection. It is not shown that the further layer 3 is only indirectly connected to the carrier layer 2, wherein other (separate) layers may be arranged between the carrier layer 2 and the further layer 3.

[0171] In the embodiments shown, it is further provided that the further layer 3 is applied over the entire surface of the carrier layer 2. It is not shown that the further layer 3 can be applied over part of the surface of the carrier layer 2 and/or arranged thereon. The further layer 3 can be applied to the outside of the carrier layer 2.

[0172] Furthermore, it is not shown that the further layer 3 is designed as a metal layer, in particular a diffusion-tight metal layer. The metal layer may have been manufactured by metallizing the carrier layer 2 by means of metal vapor deposition, wherein the metal layer can be applied directly to the carrier layer 2.

[0173] In the embodiment shown in FIGS. 3 and 4, the sub-roof sheet 1 and the further layer 3 are designed to be slip-resistant on at least one outer side. The slip-resistant surface of the under-roofing sheet 1 and the further layer 3 can be designed to be rough, wherein the uneven surface structure which causes the roughness can be produced by the scattering layer 5 and the filler particles 4. Especially the coating (scattering layer 5) of the further layer 3 causes a rough surface of the further layer 3.

[0174] In the embodiment shown in FIG. 2, it is envisaged that the sub-roof sheet 1 comprises a low fire load with an energy content (calorific value) of less than 400 MJ/m.sup.2. Especially the sub-roof sheet 1 comprises an energy content of less than or equal to 10.5 MJ/m.sup.2. The aforementioned low calorific value results especially when the sub-roof sheet 1 is designed as a vapor barrier and/or vapor block.

[0175] Especially, the carrier layer 2 and/or the further layer 3 and/or the sub-roof sheet 1 can be temperature-resistant or temperature-stable up to at least 450° C., in particular up to at least 800° C. In the embodiments shown, the sub-roof sheet 1 is temperature-stable up to at least 450° C. Up to this temperature limit, there is especially no essential change in the sub-roof sheet 1 due to the thermal load, wherein the sub-roof sheet 1 is provided for flame retardancy.

[0176] It is not shown that the sub-roof sheet 1 is designed to be resistant to treading, especially by means of at least one inorganic and/or organic lattice and/or fabric, and/or to tear propagation. A tear propagation resistance of the sub-roof sheet 1 can be ensured by a preferably reinforced foil layer, in particular comprising a vapor and/or wind block and/or metal and/or plastic and/or consisting thereof.

[0177] FIG. 6 shows that the sub-roof sheet 1 comprises an adhesive layer 8. In the embodiment shown in FIG. 6, it is envisaged that the adhesive layer 8 is applied on one side to the inner side of the sub-roof sheet 1 facing the interior of the building. Arrangement of the adhesive layer 8 on both sides is not shown. The adhesive layer 8 is provided for adhesive bonding, preferably seam self-adhesion, of neighboring sub-roof sheets 1. FIG. 7 shows that the adhesive layer 8 is formed over part of the surface. In the embodiment shown in FIG. 7, the adhesive layer 8 is arranged in strips along the longitudinal edge of the sub-roof sheet 1. Furthermore, the adhesive layer 8 is covered with a liner 9 (peel-off film) which can be removed, especially partially, for adhesive bonding.

[0178] In the embodiment shown in FIG. 6, it is provided that the adhesive layer 8 is provided at least substantially over the entire surface of the sub-roof sheet 1. In the embodiment shown in FIG. 6, it may be provided that the adhesive layer 8 must first be “activated” for adhesive bonding. Activation of the adhesive layer 8 can take place, for example, via the action of heat and/or warmth.

[0179] In the case of the adhesive layer 8 shown in FIG. 6, it is provided that it is flame-retardant and/or fire-retardant in accordance with DIN 4102-2 and EN 13501-2. Especially the adhesive layer 8 can comprise a fire resistance class of F30 and/or F60 (highly fire retardant). Accordingly, the adhesive layer 8 can also be designed as a further fire protection layer of the sub-roof sheet 1.

[0180] FIG. 9 shows a monitoring device 10. The monitoring device 10 can be integrated into the sub-roof sheet 1 and/or associated to the sub-roof sheet 1 as a separate device and/or as a device with separate means and means integrated into the sheet 1. In FIG. 9, it is shown schematically that a measuring device 11 of the monitoring device is connected to an alarm device 12. Especially a wireless connection for information exchange between the measuring device 11 and the alarm device 12 can be provided.

[0181] The alarm device 12 may serve to emit a signal tone. Furthermore, a warning signal can alternatively or additionally be transmitted via the alarm device 12, in particular to firefighters, emergency personnel and/or rescue personnel. Preferably, such a transmission is wireless.

[0182] The measuring device 11 can, for example, be integrated and/or arranged on and/or in the sub-roof sheet 1. The measuring device 11 can be designed as a smoke detector and/or heat detector. Thereby the measuring device 11 serves for the detection of a fire and/or a blaze.

[0183] Accordingly, the monitoring device 10 serves to further increase fire protection. Until the arrival of emergency services, especially the design of the sub-roof sheet 1 according to the invention can prevent further conduction of the fire, which acts in particular on the outside and/or from the outside.

[0184] In the embodiments shown, the sub-roof sheet 1 is designed to be water-repellent, especially waterproof. Preferably, the sub-roof sheet 1 comprises a water column of between 0.8 and 40 m, preferably between 0.9 and 30 m. Especially, the water-repellent and/or waterproof properties of the sub-roof sheet 1 are provided by the further layer 3. The carrier layer 2 can—but need not—be designed to be water-permeable.

[0185] In the embodiment shown in FIG. 2, the further layer 3 and the sub-roof sheet 1 (as a whole) are designed as a vapor barrier with a water vapor diffusion-equivalent air layer thickness (sd value) of between 0.5 and 1,500 m.

[0186] The sub-roof sheet 1 shown in FIG. 6, but also in FIG. 1, is designed as a vapor block with a water vapor diffusion equivalent air layer thickness (sd value) of greater than 1500 m. The water vapor retarding and/or water vapor blocking property of the sub-roof sheet 1 can also be achieved by designing the further layer 3 and/or the carrier layer 2.

[0187] It is not shown that the carrier layer 2 and/or the further layer 3 and/or the sub-roof sheet 1 is designed to be open to diffusion, preferably permeable to water vapor, with a water vapor diffusion-equivalent air layer thickness (sd value) of between 0.01 to 1 m, in particular between 0.03 to 0.3 m.

[0188] FIG. 8 shows that the sub-roof sheet 1 comprises at least one functional layer 13. The functional layer 13 can be designed to be waterproof.

[0189] Furthermore, in other embodiments, the functional layer 13 can be designed to be water-vapor-barrier, water-vapor-blocking and/or water-vapor-permeable—depending on the desired embodiment of the sub-roof sheet 1.

[0190] It is not shown that the functional layer 13 is designed as a microporous membrane layer and/or as a monolithic membrane layer. Also not shown in the embodiments shown is a multi-part structure of the functional layer 13 and/or a plurality of functional layers 13.

[0191] Especially, the functional layer 13 may comprise as material a plastic, preferably polyolefinic plastic-based and/or thermoplastic polyurethane (TPU), and/or consist thereof

[0192] Finally, it is not shown that the sub-roof sheet 1 according to any of the embodiments described earlier can be used as a fire-retardant device in a roof structure and/or in a building. A use in this regard may serve especially to increase the fire protection of a structure. Especially, the sub-roof sheet 1 is used in a pitched roof of the structure. The sub-roof sheet 1 may be provided for fire retardation of a fire originating and/or available on the roof on the outside—fire action from the outside.

[0193] The flame-retardant properties of the sub-roof sheet 1 can especially prevent and/or avoid the spread of fire in case of fire.

[0194] Execution Examples

[0195] Three examples of embodiments for producing a construction sheet according to the invention, especially a sub-roof sheet and/or facade sheet, and/or the construction sheet according to the invention, especially a sub-roof sheet and/or facade sheet, are provided below.

1. Execution Example

[0196] On a coating line, a carrier layer, in particular a nonwoven, preferably comprising or consisting of oxidized polyacrylonitrile fibers, is coated with a further layer, in particular an aqueous coating composition of the further layer, and/or the carrier layer is fed to the coating line together with the further layer, in particular wherein the further layer is coated onto the carrier layer.

[0197] The carrier layer especially comprises a grammage of 250 g/m.sup.2+/−10%.

[0198] Afterwards, the further layer, in particular the layer composite of carrier layer and further layer, can be dried at least substantially completely, preferably in a continuous drying oven.

[0199] The coating weight of the further layer, especially of the aqueous compound, is thereby 250 g/m.sup.2+/−10%.

[0200] The further layer, especially the coating compound, contains an acrylate dispersion, 15% by weight +/−10% barium sulfate, 18% by weight exfoliated graphite +/−10% and 5% by weight antimony trioxide +/−10% as inorganic fillers.

[0201] The construction sheet is thereby not foamed and not hydrophobized.

2. Execution Example

[0202] In a first step, a carrier layer, in particular a PET nonwoven, preferably with a grammage of 80 g/m.sup.2+/−10%, is coated with a further layer, in particular an aqueous coating composition, and/or the carrier layer is fed to the coating system together with the further layer, especially wherein the further layer is coated onto the carrier layer.

[0203] Afterwards, the further layer, in particular the layer composite of carrier layer and further layer, can be dried at least substantially completely, preferably in a continuous drying oven.

[0204] The coating weight of the further layer, especially of the aqueous compound, is thereby 200 g/m.sup.2+/−10%.

[0205] The further layer, in particular the coating composition, contains an acrylate dispersion, 15 wt. %+/−10% barium sulfate and 18 wt. %+/−10% exfoliated graphite as inorganic fillers.

[0206] The further layer, especially the coating compound, also contains foaming aids and is preferably foamed by air before coating. After coating, the further layer is especially hydrophobized.

[0207] In a second step, the construction sheet obtained in the first step is glued and/or substance-bonded to a further carrier layer, in particular a nonwoven, preferably of oxidized polyacrylonitrile fibers, by means of an adhesive agent, in particular a reactive PU hot melt, on a laminating line.

[0208] The additional carrier layer may comprise a basis weight of 250 g/m.sup.2+/−10%.

3. Execution Example

[0209] In a first step, a carrier layer, especially a PET nonwoven, is coated with a thermoplastic layer, especially comprising a thermoplastic ether TPU, on an extrusion coating line.

[0210] The carrier layer comprises a grammage of 80 g/m.sup.2+/−10%. The thermoplastic layer comprises a coating weight of 30 g/m.sup.2+/−10%.

[0211] In a second step, the sheet and/or layer composite obtained in the first operation is coated with a further layer, especially an aqueous coating composition, and/or the carrier layer and/or the thermoplastic layer is fed together with the further layer to the coating system, in particular wherein the further layer is coated onto the carrier layer and/or the thermoplastic layer.

[0212] Afterwards, the further layer, in particular the layer composite comprising carrier layer, thermoplastic layer and further layer, can be dried at least substantially completely, preferably in a continuous drying oven.

[0213] The coating weight of the further layer, especially of the aqueous composition, is thereby 200 g/m.sup.2+/−10%.

[0214] The further layer, in particular the coating composition, contains an acrylate dispersion, 15 wt. %+/−10% barium sulfate and 18 wt. %+/−10% exfoliated graphite.

[0215] The further layer, in particular the coating compound, also contains foaming aids and is foamed, in particular before coating, preferably by means of air. Hydrophobing is especially dispensed with.

[0216] In a third step, the sheet obtained in the second step is glued and/or substance-bonded to a further carrier layer, in particular a nonwoven, preferably of oxidized polyacrylonitrile fibers, by means of an adhesive agent, in particular a reactive PU hot melt.

[0217] The other carrier layer may comprise a grammage of 250 g/m.sup.2+/−10%.

LIST OF REFERENCE SIGNS

[0218] 1 Sub-roof sheet [0219] 2 Carrier layer [0220] 3 Further layer [0221] 4 Filler particles [0222] 5 Scattering layer [0223] 6 Layer thickness of 2 [0224] 7 Layer thickness of 3 [0225] 8 Adhesive layer [0226] 9 Liner [0227] 10 Monitoring device [0228] 11 Measuring device [0229] 12 Alarm device [0230] 13 Functional layer