How To Repair Flat Leaky Roof

Make sure to remove all silicone residues.

How to repair flat leaky roof.

Leaks usually occur at low spots or where the roofing felt has been damaged. Sometimes doing that is difficult. 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.

Cut around the damaged area until the membrane rests flat. For most small punctures you can repair your roof simply by forcing sealant into them. Press the membrane flaps to the cement to reseal the cut. Some roofers also suggest using 6d roofing nails to secure the blister flaps.

Apply an epdm primer and when touch dry add self adhesive rubber tape 3 around malleable flashing covering the hole. A small patch can act as a permanent epdm roof repair for leaks and cracks. 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. 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. Flat roofs are built up of layers of roofing felt and tar. If you take that step be sure to cover the nail heads with tar roof sealant or peel and stick flashing patch.