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US 4,558,550 AGranted
Insulating and fluidtight roof covering
AssigneeSMAC Acieroid
InventorsJean Marchais, Michel Netter
Life of this patent
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AssigneeSMAC Acieroid
InventorsJean Marchais, Michel Netter
Estimating the term…
The covering is constructed on the site and adheres to a corrugated support 1 and to spaced-apart projections 2. It comprises a reinforcing element of metal or of a glass cloth 4, 6 having meshes which are small enough to retain a foaming product which is still in the liquid state but sufficiently rigid (for example ribbed) so as to be planar and have great strength. The reinforcing element is embedded in the foaming material in the course of the solidification of the latter and imparts thereto a planar outer surface. Air pockets are formed between the corrugation roots 10 and the solidified and reinforced foaming product. This reinforcing element may include two successive layers, namely a layer 4 having small meshes and a layer 6 having large meshes, the latter providing the desired strength.
An insulating and fluidtight roof covering for constructing on the site, said covering comprising in combination, a support structure defining spaced-apart lines of projecting support surfaces and hollows between said support surfaces, a substantially flat sheet of foam material having a substantially constant thickness, generally sheet-shaped reinforcing and stiffening means having small meshes embedded in the sheet of foam material, said meshes being of such size as to allow passage therethrough of a minor portion of said foam material toward said support surfaces when said foam material is in a prior liquid state for application on said reinforcing means and support surfaces so that, when the foam material is in a set state after application, a major portion of the foam material is retained by said reinforcing means and said minor portion of the foam material adjacent to said support surfaces has extended through and beyond the meshes of the reinforcing means and into direct contact with said support surfaces, said foam material adhering directly to said support surfaces by its own adhesiveness, said major portion and said minor portion of said foam material constitute a single integral piece of said foam material, and said minor portion of the foam material spans the hollows between adjacent ones of said support surfaces and only slightly penetrates said hollows to an extent depending on the thickness of the foam material on a side of the reinforcing means adjacent to said support surfaces.
A method for covering roofing comprising placing a flat and taut reinforcing element having relatively small meshes on a fixed support comprising projections which projections are spaced apart and substantially parallel to each other and define hollows therebetween, and depositing on said reinforcing element a liquid foaming product which almost instantaneously solidifies by adhering to the projections of the support under the effect of its own adhesiveness after having wetted a lower side of the reinforcing element and swelled around the reinforcing element so as to constitute a substantially planar sheet spanning said hollows and only slightly penetrating said hollows, said meshes having such size as to allow passage therethrough of only a minor portion of said foam material.
Dependencies are inferred from the claim text.