Permo Forte SK
Made from the same high performance material as the standard Permo Forte SK, has been specially designed with an integral adhesive strip, which allows horizontal laps to be sealed without the need to apply rolls of tapes.
David Arendell comments, “Permo Forte membrane is one of the best performing vapour permeable underlays on the market….The introduction of a self sealing membrane gives even more choice to our customers and should speed the laying process.”
Permo Forte SK is a four layer material that has very high nail tear resistance and tensile strength and is designed to allow the diffusion of water vapour from the roof space to the outside. |
Span-Tech
Made from non-woven spun bond polypropylene, Span-Tech's three-layer construction offers high tensile strength with nail tear resistance and is not susceptibility to wind-noise when fitted.
The backing layer of the underlay will also absorb excess water vapour, until it can be easily ventilated from the roof space.
Span-Tech has recently been awarded a BRE certificate and meets the relevant British Standards recommendations. |
