Roof Gully Leaking

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.

Roof gully leaking.

You should always attempt a mechanical leaky roof fix whenever possible. 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. A flashing is a transitional roofing material that connects the roof material to some other building material or to another part of the roof. 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.

Check your lay boards are ok first and no rot lay building paper with new lead valleys retile back both sides if your tiles are bedded in cement in your valleys i tend to fit some asbestos free board cut to size dependent on overlap up the lead valley with the tiles bedded on this. This method of lead valley repair is proven to not only be fast and safe wit. In either situation the leaking roof valley can be fixed by removing affected shingles and structural elements and upgrading your roof s flashing. A roof valley is very prone to leaks especially if you have an older roof.

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. This video shows the traditional and best way to repair a lead valley on a roof. That means replacing or repairing existing flashing instead of using any type of sealant as a leak stopper.

The only proper and sure way to fix your lead valleys is strip the tiles out either side and relead them. 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. Only use caulk for very small holes and when flashing isn t an option as a leak stopper. This video shows the full repair from removing leaded va.