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.
Fix leaky roof around chimney.
Chimney roof leaks are usually caused by gaps or cracks between the metal flashing used to join the chimney to the roof and the chimney.
Patch the nail or screw holes by slipping a piece of roof flashing underneath the shingle.
This can involve a significant amount of the roofing tiles felt and flashing to be removed in order to fully uncover the exact leak source and check for any damaged decking or plywood.
Apply roof cement to any gaps or cracks.
Clean any leaves or other debris out of the gap between the flashing and chimney.
Use a chisel to remove any hardened roofing cement.
To do this ask an assistant to observe the area of the ceiling near the chimney and run water along the sealed gaps of the.
First roughen the area around the hole with a wire brush or sandpaper and then clean it.
To repair loose roof chimney flashing.
Apply a generous amount of roofing cement behind the flashing.
In this case of a roof leaking from around a chimney or fireplace the problem is often the flashing needs to be removed and replaced.
To repair chimney flashing leaks.
Small holes or corroded spots in flashing can be easily repaired.
Water test the roof at the area of the chimney using a garden hose.