How To Fix Roof Flashing Leak

To repair leaks caused by metal flashing around chimneys and dormers simply reseal joints using a caulk gun filled with roofing cement.

How to fix roof flashing leak.

Cut the self adhesive patching material to the desired. Have your helper stay inside the house waiting for the drip to appear. Pry up the edges of the flashing with a small prybar carefully so you do not damage the shingles or underlying sheathing. Use masonry nails or screws to reattach the flashing tight against the chimney.

Plug pinholes with roofing cement and patch holes up to about 3 4 inch in diameter with a patch from the same material as the flashing. Liberally apply a coat of primer to the damaged area as well as the surrounding material. Replace any missing or rotted siding above the step flashing on dormers. Clean the area around the damage to remove any debris.

Apply a generous amount of roofing cement behind the flashing. Isolate areas when you run the hose. Clean any leaves or other debris out of the gap between the flashing and chimney. Remove the roofing nails with the prybar as the flashing is being removed.

Small holes or corroded spots in flashing can be easily repaired. Use a chisel to remove any hardened roofing cement. Vent flashing is damage near or on the vents of your roof. Allow the primer to dry if instructed to do so by the packaging.

Adhere it using your flashing cement. Flexible roof sealant apply flexible roof sealant black jack roof patch rubberized roof cement from a can or tube to fill holes gaps flashing and loose shingles around the chimney new flashing shingles replace flashing and shingles around the chimney creating a good new water barrier. First roughen the area around the hole with a wire brush or sandpaper and then clean it. Recaulk the corner flashing if any areas have hardened caulk.

For metal roof flashing that is corroded and needs to be replaced you will need to remove it from the shingles. Dig out any cracked or dry caulking that isn t properly sealing adjoining surfaces and replace with silicone caulk. First snip the new flashing with your shearers then bend it to a 90 degree angle. For example soak the downhill side of a chimney first then each side then the top on both sides.

If you see damage to joints previously sealed.