Chimney flashing has two parts.
Fix leaking chimney flashing.
The first step in your repair is identifying where the leak is coming from then you ll be able to make the appropriate fix.
To repair your flashing with flashseal you first need to clean the area of any dirt and debris to allow the product to work as efficiently as possible.
If you find the problem is with the brick or mortar the average cost for masonry repairsis 1 192.
A base flashing which attaches to the wood decking on the roof and a counter flashing that covers the base.
If the damage and the leak are minor you should be able to replace the chimney flashing just like you would step flashing.
Apply a generous amount of roofing cement behind the flashing.
The chimney crown is the cement part on top of the chimney.
2 many chimney leaks are from cracks in the chimney crown.
Code requires a chimney have a cricket if it is thirty inches or wider.
Often ponding water will rust a hole in the simple flashing found on most chimneys.
Full service chimney often installs crickets on all chimneys since this is where over one half of all chimney leaks are from.
To repair loose roof chimney flashing.
Replacing the flashing is expensive.
Use a chisel to remove any hardened roofing cement.
The bricks go up around the tile flue liners but at the top you need something to stop the rain and snow from just falling in around the tiles.
Chimney flashing repairs are done around the chimney area.
Clean any leaves or other debris out of the gap between the flashing and chimney.
Use special masonry caulk to seal the joints between the flashing and the chimney.
If the mortar joint is deteriorating the joint will need to be repointed and you may need to have this done professionally.
How to fix it.
After the clean area dries apply a thin base coat of flashseal that covers the entire flashing area and extends a few inches above the flashing line.
Get a chimney cover and have a professional make sure it s not this simple.
Use masonry nails or screws to reattach the flashing tight.
