Schimney Roof Counter Flashing
Three types of flashing are typically used on each roof.
Schimney roof counter flashing. The installation of counter flashing against a chimney works together with the base and step flashing to form a waterproof system for your roof. A piece of metal that is sealed to the chimney surface and covering the top of the step flashing to form a water tight barrier by directing water over and away from the step flashing. 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. Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in.
Bottom the bottom cap flashing or counter flashing is a single piece of metal that covers the vertical portion of the base flashing. Flashing directs rainwater away from these junctions preventing subsequent leaks and water damage. This chimney flashing kit provides protection from water infiltration around a chimney. It involves two pieces of flashing.
The second piece the counter flashing is embedded into the masonry of the chimney. For extra protection run a bead of urethane between the step flashing and the chimney. In good quality work the top is bent and set 1 to 11 2 inches into a mortar joint reglet. Flashing refers to the metal barrier installed where the roof meets any vertical wall including chimneys and dormers.
The first base flashing sits around the bottom of the chimney. Step 1 cut the mortar joint. Press the flashing into the urethane to achieve a positive seal. Base flashing step flashing and counter flashing.
Counter flashing provides an added measure of protection. Counterflashing will cover the tops of the step flashing. All you need to complete this project are a few tools and a little know how. This kit can be used for new construction or reroofing applications by a professional or do it yourself installer.
Counter flashing counter flashing is placed over the step flashing parallel to the chimney. Properly flashing a chimney is important to prevent water from leaking between the chimney and roof and getting into the building s walls. Counter flashing is often used to flash chimneys. As you roof along a chimney alternate shingles and l shaped pieces of step flashing.
Not only will it prevent leaks but it will also extend the life of your chimney s masonry. Cap flashings should be fastened to the chimney only.