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Indications
The solution proposed aims to offer an insulating
protection of the waterproof membrane in the presence
of strong extremes of heat which could endanger its functionality over time.
Unlike the “Inverse roof” system, this solution avoids the
risk of heat erosion due to the penetration of rainwater under the insulating material.
In fact, with the exception of 2 cm of Stiferene, the
insulating material is protected by the waterproof membrane which prevents water getting in.
The Sandwich system may also be used with bituminous waterproof systems, see ballasted flat roofs – round gravel. The characteristics of the complementary materials are highlighted only to indicate a good level quality standard.
Specification wording
Preparing the foundation
Compensation layer consisting of non-woven polyester
fibre fabric with weight 500 gr/m2.
Vapour barrier consisting of a sheet of polyethylene, thickness 0.3-0.4 mm.
Waterproof layer consisting of a stabilised or reinforced synthetic membrane or of bituminous membranes.
Laying Stiferene 350, thickness 2 cm. Protective layer consisting of non-woven polyester fibre felt 500 gr/m2.
Uniform distribution of round gravel Ø 15/25 mm.
Thickness about 40 mm, total weight no less than
60 Kg/m2.
Products
Class S
Stiferene
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