It goes without saying the waterproofing of your flat roof is pretty important. Perhaps the most important part of the whole project. By their nature flat roofs are more prone to leaks than pitched, and you need to make sure water stays out for the lifetime of the building.
As the largest specialist supplier of roofing materials in UK, SIG Roofing has the Flat Roofing Waterproofing sytems you need to keep your flat roof dry.