First roughen the area around the hole with a wire brush or sandpaper and then clean it.
How to fix roof flashing leak.
Vent flashing is damage near or on the vents of your roof.
Clean the area around the damage to remove any debris.
Use masonry nails or screws to reattach the flashing tight against the chimney.
Apply a generous amount of roofing cement behind the flashing.
For metal roof flashing that is corroded and needs to be replaced you will need to remove it from the shingles.
Replace any missing or rotted siding above the step flashing on dormers.
Adhere it using your flashing cement.
Remove the roofing nails with the prybar as the flashing is being removed.
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.
Small holes or corroded spots in flashing can be easily repaired.
For example soak the downhill side of a chimney first then each side then the top on both sides.
Have your helper stay inside the house waiting for the drip to appear.
Isolate areas when you run the hose.
Pry up the edges of the flashing with a small prybar carefully so you do not damage the shingles or underlying sheathing.
Start low soaking the area just above where the leak appears in the house.
Allow the primer to dry if instructed to do so by the packaging.
Use a chisel to remove any hardened roofing cement.
If you see damage to joints previously sealed.
First snip the new flashing with your shearers then bend it to a 90 degree angle.
To repair leaks caused by metal flashing around chimneys and dormers simply reseal joints using a caulk gun filled with roofing cement.
Liberally apply a coat of primer to the damaged area as well as the surrounding material.
Step 3 remove metal roof flashing.
Clean any leaves or other debris out of the gap between the flashing and chimney.
Cut the self adhesive patching material to the desired.
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.
