Seal A Leaking Flat Roof

Clean and dry the area you wish to apply flex seal.

Seal a leaking flat roof.

A small patch can act as a permanent epdm roof repair for leaks and cracks. Leaks in wooden roofs are commonly caused by a gap between the panels which move during expansion and contraction. This will help the new coating seal where it overlays the old roof coating edges and will reduce the chances of leaks at those locations. The patch should be adhered from the centre over the hole outwards with a firm hard roller.

When the membrane is completely dry apply the appropriate roof repair material such as roof cement tar or peel and stick patch. Be sure to check any areas where the roof comes to a juncture or where there are any added items such as exhaust pipes. If you take that step be sure to cover the nail heads with tar roof sealant or peel and stick flashing patch. This can be done by pouring a small amount of water over the area you suspect the hole in your roof is located and checking for the leak underneath.

For a gap of 1 inch or less caulking or sealant is the best method of repair. Feathering or tapering the edges of thick but sound roof coating. Step 2 fill a caulking gun with a watertight polyurethane or oil based sealant and hold it at an angle to insert the product directly into the gap.