Flat roofs have been available since way back when. Actually a flat roof is mostly a pitched top which happens to be created with structural decking boards and also covered with a water repellent compound. Water is aimed along the pitches to drain spouts and removed from the roofing. Channels can be utilized that, to this particular article writer, resembling a river route to keep water a lot more directly on the spouts. There will be 100s, if they are not 1000s, of items that can be purchased; nevertheless, they seem to belong to 4 different varieties of flat roofs.