How To Install Roof Flashing Around A Chimney

Now you need to install the step flashing.

How to install roof flashing around a chimney.

Fit the front cap flashing around the front of the chimney. Saw as high as the height of the cap flashing. Install the cap flashing. Pound the flashing into the grooves and fasten with the drive in expanding anchors.

Bend a piece of cap flashing to fit around the top corner of the chimney and add the cap flashing across the back of the chimney. Damaged or improperly installed roof flashing especially around the chimney or dormer is one of the most common causes of roof leaks. Then spread the plastic roofing cement along the base flashing sheet underside and simply place the flashing around the base of the chimney and over the shingles. Use mortar nails to secure the base flashing to the chimney.

The grooves should be 1 inch 2 5 cm deep. So chances are if you ve been looking into your roof and its flashing you. According to the federal emergency management agency fema improper roof flashing could lead to wood rot and even deck collapse. Make sure you leave a gap of two inches at the base for the water to drain.

Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in.