How to repair a flat roof leak. Siding and flashing on any roof are the biggest causes of leaks. See how to make repairs on flat roofs. Vinyl al metal siding is not watertight and therefore with heavy wind-driven rains, will cause leaks. It is important to keep siding off a roof surface. There should be at least a 3' space from the roof to the bottom of the siding. On shingle roofs, it is important to keep the flashing clean by blowing out accumulated debris with a leaf blower. The transition from a flat roof to flashing is very important. we use Turbo poly Seal to seal the flashing and make a transition. Turbo Poly seal can be purchased at https://bergstromm.com/product/turbo-poly-seal-roof-repair-kit-5-ft/
