Roof Gully Leaking

The only proper and sure way to fix your lead valleys is strip the tiles out either side and relead them.

Roof gully leaking.

A roof valley is very prone to leaks especially if you have an older roof. A flashing is a transitional roofing material that connects the roof material to some other building material or to another part of the roof. That means replacing or repairing existing flashing instead of using any type of sealant as a leak stopper. There are times when roof valleys in good condition gets blocked with leaves and debris.

Only use caulk for very small holes and when flashing isn t an option as a leak stopper. If you have a roof leak it may well be through the valley. So roof valleys are important elements on a roof to be maintained properly. Rarely will caulk or roof cement cure a leaky roof at least for very long.

The reason why the roof valley is such a sensitive area has to do with all the rainwater and or melting snow that accumulates and flows through the valley on its way into the gutters. Many roof valley leaks are caused by roofing nails that have been poorly placed and are acting as a dripper feeding water through from the roof above. In either situation the leaking roof valley can be fixed by removing affected shingles and structural elements and upgrading your roof s flashing. This video shows the full repair from removing leaded va.

The roofing nails are fine so long as the lead of the roof valley is intact but once it starts to crack or fracture due to water pressure corrosion or other damage the nail provides a space for water to run into the home. You should always attempt a mechanical leaky roof fix whenever possible. This is where two parts of the roof join. There will be a damming effect during very heavy rain especially after a long dry spell and a large amount of water can then pour into the roof cavity.