Flashing prevents water from leaking down the chimney into the attic.
Flashing around chimney in attic.
4 chimney flashing causes leaks the flashing is what keeps water from going into the place where the brick structure comes through the roof or otherwise comes close to the roof there s a fairly large gap between the bricks and the roof and water will pour through that hole if it s not sealed up.
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.
Apply a thick bead of the high temperature caulk around the joint where the flue enters the attic.
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.
Base flashing bottom before the base flashing is installed the roof is shingled up to the bottom of the chimney.
According to the federal emergency management agency fema improper roof flashing could lead to wood rot and even deck collapse.
Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in.
The attic allows you to see prior or current leak activity.
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.
Chimney was leaking fixed with 26 gauge galvanized.
Damaged or improperly installed roof flashing especially around the chimney or dormer is one of the most common causes of roof leaks.
Often ponding water will rust a hole in the simple flashing found on most chimneys.
How to repair leaky chimney flashing.
Code requires a chimney have a cricket if it is thirty inches or wider.
This is an area that often tells the story the best.
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.
The other way is through the attic space.
Pound the flashing into the grooves and fasten with the drive in expanding anchors.
