Reinforced bituminous Membrane
Reinforced bituminous membrane also called Felt, consist of two or three layers of sheet felt materials that form a dense, voidless and impermeable barrier.
Roofing felt is a composite of an absorbent sheet of organic or synthetic fiber that is impregnated/saturated and coated with a waterproofing agent such as tar or asphaltic bitumen that prevents ingress of moisture.
The felt roof system is built up of multiple layers of high performance felts and mastic asphalt over an insulated timber or concrete flat roof deck.
When applied the layers of vapour dispersion and control membranes are sealed with graded roofing felts to guarantee a waterproof installation.
There are several techniques for applying felt - depending on the materials used, however felt is generally rolled out over the roof and bonded together by way of hot bitumen or adhesives.
Materials technology and new products have modernised the range of felts many manufacturers supply, so modern man-made and composite materials felt roofs that use modified bitumen; include rubber modified elastomeric bitumen and polymer modified bitumen are now available.
Advantages Felt Roofs
A proven roofing system for over 50 years
Readily available
Applicable to different scales of roof - small to large
High materials have established ratings and standards
Can incorporate new products and technologies
Seamless flat roof coverings can be created
Durable materials
Not prone to wind sheer and peel
Can be created for foot traffic
Suitable for all surface types - flat, pitched, curved
Suitable for intricate detail
A range of application methods and techniques available
10,15,20 year guarantees available
