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Abstract
The system comprises the sealing of flat roofs by a single waterproofing layer and a vapor check, both loose layed, in sheet form. It simplifies conventional practice and prevents the damaging accumulation of moisture in the thermal insulation. The individual lengths are overlapped and solvent welded; the seams receive a futher seal and T-joints are injected to prevent capillary attraction. A covering of 50mm of round gravel is then applied as ballast. Roof details are of pvc coated metal mechanically attached and the main sheet is solvent welded thereto. The roofing sheet and the vapor check sheet are vapor permeable, the former more so than the latter, thus allowing the roof to breathe while ensuring that the thermal insulation is kept dry. This material is exceedingly elastic to an extent that building movement can be no problem, and expansion joints are unnecessary. Several hundred thousands of square meters are being installed every month on the Continent and in fact its resistance to sharp temperature variation within a wide range makes it particularly suitable to arduous conditions. Many million square meters are already proving, since 1966, the outstanding qualities of this material.
The system comprises the sealing of flat roofs by a single waterproofing layer and a vapor check, both loose layed, in sheet form. It simplifies conventional practice and prevents the damaging accumulation of moisture in the thermal insulation. The individual lengths are overlapped and solvent welded; the seams receive a futher seal and T-joints are injected to prevent capillary attraction. A covering of 50mm of round gravel is then applied as ballast. Roof details are of pvc coated metal mechanically attached and the main sheet is solvent welded thereto. The roofing sheet and the vapor check sheet are vapor permeable, the former more so than the latter, thus allowing the roof to breathe while ensuring that the thermal insulation is kept dry. This material is exceedingly elastic to an extent that building movement can be no problem, and expansion joints are unnecessary. Several hundred thousands of square meters are being installed every month on the Continent and in fact its resistance to sharp temperature variation within a wide range makes it particularly suitable to arduous conditions. Many million square meters are already proving, since 1966, the outstanding qualities of this material.
Date
9/1974
9/1974
Author(s)
Watson, C
Watson, C
Page(s)
Paper 33
Paper 33
Source
Society of Chemical Industry
Society of Chemical Industry
Keyword(s)
PVC; monomerically plasticized; flat roof; waterproof layer; vapor check
PVC; monomerically plasticized; flat roof; waterproof layer; vapor check