Flat Roof Leaking Around Chimney

Instead sealing the chimney crown with a liquid sealant we used a rubber membrane.

Flat roof leaking around chimney.

That part of the flashing is very vulnerable to leaks. The flashing on a chimney is one of the biggest reasons for roof leaks. Mortar cracks chimney flashing and crown deterioration on a chimney will contribute to leaks on a flat roof. If your roof still leaks it is not the chimney.

The mortar grout is usually the first to go. Wrap the chimney with plastic and tape it securely. All chimneys need maintenance over time. Most of the time the metal flashing has to be inserted into a slot into the face of the brick.

Repairing the flashing on a chimney. To perform a proper chimney leak repair is crucial for any flat roof. Leaks around fireplace chimneys are common and can be hard to identify the source. When a roof leaks the problem is often due to leaks in and around the metal roof flashing that protects roof edges valleys and the junctions between roofing and obstructions such as chimneys dormers and vent pipes.

Applying roofing cement to gaps between metal flashing and the chimney. Sometimes a chimney may start to leak only after a very wet series of storms.