London Flat Roofing. 154c Fleet Road, Hampstead, London NW3 2QX
If your roof is leaking, a new flat roof formed from Kemper v210 is a good choice. This system is relatively cheap and comes with a good guarantee. Flat roof repairs can also be carried out using the material. New flat roofs can be layered over the old flat roof, so stripping and exposing the old decking is not always necessary.
RoofKrete is the best flat roofing material on the market with an expected lifespan of over 100 years. You can walk on it, it never needs maintenance, no solar reflective paint, and it’s completely fire proof.
This new flat roof is being laid using Kingspan’s ‘cut to falls’ insulation, then covered using EPDM rubber, single ply as the waterproofing membrane. This roof will carry a 20 year insurance-backed guarantee. New roofs today need to be insulated to a very high standard and the depth of insulation on this roof is very good.
Single ply flat roof covering rubber EPDM not firestone, over torch on mineral felt, asphalt, 80mm Kingspan insulation glued to decking, new flashings box gutter, scaffolding, no lead, 20 year guarantee. Part L of Building Control was not applicable.
Stripping and re-laying the roof to the correct falls was an option the customer thought was too expensive, so it was decided that this flexible liquid roofing system would be used. The system is basically glass fibre ‘GRP’, but the resins have been modified especially for roofing applications like this roof. The end result is extremely satisfying, looks good and can come with guarantees of up to 25 years, depending on the layers we use to build up the covering.
The decking to this flat roof has completely deteriorated. Back in the 70s it was the custom to lay flat roofs on chipboard or straw board. As you can see in the video, when water gets through to the roof decking it’s completely destroyed and cannot even support the weight of the roof laid upon it. The entire roof collapses and there is no alternative but to completely strip the roof back to the bare joists and start again.
The decking on this roof was formed from straw boards, and is completely useless so we had to strip it all and re-lay new decking before laying new EPDM rubber.
My guess is that this roof wasn’t laid by specialists trained in EPDM rubber roofing materials. The quality of the workmanship is very poor, and EPDM will get a bad image if untrained people are allowed to carry on purchasing and installing this excellent material incorrectly. It was found that the problem on this roof was the leak from the slates at the back of the tiles and not the Rubber roof at all.