Flat roofs; felt coverings to Dormers, Extensions, Porches, Garages and even a Whole House to which in the 1970’s no Building Society would provide a Mortgage.

Flat Roofs, built with felt are often without sufficient insulation, when most flat roofs were installed 25mm of insulation was all that was required. With the latest Building Regulations, Part L: 

the need to conserve heat is even more critical, your hard earned fuel is going

through the flat roof like an open window.

Why has felt been such a problem; it has joints, it is tar based, people have walked on the chippings, this cracks and of course you are never quite sure where the leaks come from. Many roofs leak slowly, the roofs timbers absorb an amount of water, like a sponge, the warmth of the sun can dispense it, but it is still leaking without it being apparent.

Rooflines has two products to deal with Flat Roofs; GRP and EPDM; click on the titles adjacent for more information.