The roofing membranes represent an auxiliary waterproofing layer when used with shingles, tiles or asphalt patterns (they are necessary mainly on the low pitch roofs) or they can be used as the primary hydro-insulating layer on the flat roofs.
The optimum vapour diffusion is ensured by the system of diagonal channels, provided with an anti-adhesive finish.
The roofing membranes are laid directly on the thermal insulation (rockwool, polystyrene), on the sheething or they can be simply hung and bonded on the roof framing members.
Roofing membranes tretaed with the micro-perforation/h2>Those membranes where the vapour diffusion effect is ensured by the micro-pe...
The asphalt shingles (just like any other shingles) do not provide perfect water insulation when used on low-slope roofs. To chieve the 100% waterproof solution. The waterproofing membranes should be used prior to laying the shingles.Waterproofing bitumenous membranes
The most frequently used are the hot bituminous sheets and the self adhesive waterproofing sheets. Both (either one or the other) must be used (or at least should be considered) in following cases:
- if the asphalt shingles are used on roofs with slope which is lower than the minimum slope recommended by the shingles manufacturr;
- in the places where we can expect that the rain water or snow will ac...
