When repairing flat roofs many builders opt to repair them in the traditional way. This is fine and if they do a great job you shouldn't have any problems but it isn't always that efficient and it doesn't offer the same protection as a fibreglass roof. The fibreglass chemical dries and offers a full water proofing solution and as long as it is applied correctly it should prevent any water ever getting into the roof space. Because the fibreglass chemical kits are now widely available the cost of the application and the entire work shouldn't be too high. If you have a leaky flat roof and you would like a builder to take a look at it, contact Builders in Skipton.