Caulking Flashing Around Chimney

Check flashing around the base of the chimney along the walls and around the plumbing vents.

Caulking flashing around chimney.

Sections of l shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney. Next comes the counterflashing. Most often when a chimney leaks the leak originates in that spot. Getting the right sealant on your flashing is the best bet.

The first is called step flashing. Silicone caulk w caulking gun. Embed the corner step flashing in the caulk and nail it to the roof with two roofing nails. Chimney flashing is the layer of sheet metal that connects the roof to the chimney.

Effective roof flashing around a chimney includes two layers. Apply a jelly bean size dollop of caulk at the corner where the chimney meets the roof. A second layer of metal is embedded in the chimney mortar joints and folded down to cover the top of the step flashing. One laying involves tightly playing sheet metal around the chimney edges.

Look for areas where water might be getting in gaps bent flashing holes made by roofing nails etc. Flashing is your main defense against leakage so you want to make sure it is securely fastened and that there are no holes or gaps. It is designed to be the seal that prevents water from entering your home by running down the chimney. In the second layer more sheet metal is inserted into the chimney mortar joints and folded over to cover the first layer.

Proper flashing around a chimney includes two layers. Snip and bend a piece of prebent 8 in.