How To Repair Flat Leaky Roof

Apply an epdm primer and when touch dry add self adhesive rubber tape 3 around malleable flashing covering the hole.

How to repair flat leaky roof. Some roofers also suggest using 6d roofing nails to secure the blister flaps. Press the membrane flaps to the cement to reseal the cut. The patch should be adhered from the centre over the hole outwards with a firm hard roller. Make sure to remove all silicone residues.

In most cases the leak is directly below the damaged spot and the damage to the roofing felt is easy to see. This will plug it and will also provide an adhesive for the flaps of the membrane to stick to. Leaks usually occur at low spots or where the roofing felt has been damaged. Apply roofing cement peel back the layers of the membrane you cut and apply roofing cement to the leak and to the entire section of the roof underneath the membranes you cut away.

If there s still water pooled in the leak area mop it up or soak. When the membrane is completely dry apply the appropriate roof repair material such as roof cement tar or peel and stick patch. Cut around the damaged area until the membrane rests flat. Sometimes doing that is difficult.

Flat roofs are built up of layers of roofing felt and tar. For most small punctures you can repair your roof simply by forcing sealant into them. If you take that step be sure to cover the nail heads with tar roof sealant or peel and stick flashing patch.