Flashing Around Chimney In Attic

Flashing prevents water from leaking down the chimney into the attic.

Flashing around chimney in attic.

If you see white stains on the brick inside the home you might have an issue with leaks. How to repair leaky chimney flashing. According to the federal emergency management agency fema improper roof flashing could lead to wood rot and even deck collapse. Pound the flashing into the grooves and fasten with the drive in expanding anchors.

The material is usually aluminum or galvanized steel and depending on the type of roof you have is most likely in the valleys around the chimney and even around dormer windows or skylights. If you see water entry in the attic on the uphill side of the chimney we know a chimney cricket is needed so water is not ponding in this area. Base flashing bottom before the base flashing is installed the roof is shingled up to the bottom of the chimney. Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in.

The other way is through the attic space. The bottom base flashing is made of a single piece of metal extending 3 to 6 inches down over the shingles that already have been installed and 12 inches some say less up the bottom face of the chimney. Weather and oxidization are the most common culprits for flashing deterioration but it is possible that flashing can just simply come loose. Code requires a chimney have a cricket if it is thirty inches or wider.

Apply a thick bead of the high temperature caulk around the joint where the flue enters the attic. This is an area that often tells the story the best. The attic allows you to see prior or current leak activity. Walking on the roof helps the inspector feel how much flex is in the roof sheathing particularly in key areas such as valleys around chimneys and around roof penetrations.

Damaged or improperly installed roof flashing especially around the chimney or dormer is one of the most common causes of roof leaks. Chimney was leaking fixed with 26 gauge galvanized. 8 cut a piece of flashing to measure the circumference of the flue plus 6 inches.