Fix Leaking Chimney Flashing

To repair loose roof chimney flashing.

Fix leaking chimney flashing.

How to fix it. 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. Replacing the flashing is expensive. Code requires a chimney have a cricket if it is thirty inches or wider.

Apply a generous amount of roofing cement behind the flashing. Chimney flashing repairs are done around the chimney area. If the mortar joint is deteriorating the joint will need to be repointed and you may need to have this done professionally. Use masonry nails or screws to reattach the flashing tight.

Use a chisel to remove any hardened roofing cement. Full service chimney often installs crickets on all chimneys since this is where over one half of all chimney leaks are from. 2 many chimney leaks are from cracks in the chimney crown. Renew flashing seals by chipping out the old mortar and caulking along the edges of the flashing.

If the damage and the leak are minor you should be able to replace the chimney flashing just like you would step flashing. The chimney crown is the cement part on top of the chimney. Chimney flashing has two parts. Use special masonry caulk to seal the joints between the flashing and the chimney.

Get a chimney cover and have a professional make sure it s not this simple. Clean any leaves or other debris out of the gap between the flashing and chimney. If you find the problem is with the brick or mortar the average cost for masonry repairsis 1 192. However if it s an issue with the flashing or shingles you ll want to budget 654 for roof repair costs.

A base flashing which attaches to the wood decking on the roof and a counter flashing that covers the base. 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. 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.