Base flashing step flashing and counter flashing.
Stchimney roof counter flashing.
The counter flashing is either cut into the brick face or embedded into the mortar between brick layers.
Not only will it prevent leaks but it will also extend the life of your chimney s masonry.
Step 1 cut the mortar joint.
The first base flashing sits around the bottom of the chimney.
Three types of flashing are typically used on each roof.
The counter flashing extends from the layer of bricks and then bends down overlaying the top edges of the primary 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.
In good quality work the top is bent and set 1 to 11 2 inches into a mortar joint reglet.
Counter flashing provides an added measure of protection.
Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in.
There are different types of flashing for different chimneys but we ll focus on flashing designed for round metal pipe.
It involves two pieces of flashing.
Chimney flashing is a generic term for any metal or rubber boot used when a vent pipe passes through a roof.
Water sheds from off the brick chimney surfaces down over the outside edge of the step flashing.
Pound the flashing into the grooves and fasten with the drive in expanding anchors.
Properly flashing a chimney is important to prevent water from leaking between the chimney and roof and getting into the building s walls.
It directs water away from the chimney and seals off the gap between the pipe and the roof.
Counter flashing counter flashing is placed over the step flashing parallel to the chimney.
Cap flashings should be fastened to the chimney only.
Flashing directs rainwater away from these junctions preventing subsequent leaks and water damage.
The second piece the counter flashing is embedded into the masonry of the chimney.
The installation of counter flashing against a chimney works together with the base and step flashing to form a waterproof system for your roof.
All you need to complete this project are a few tools and a little know how.
Flashing refers to the metal barrier installed where the roof meets any vertical wall including chimneys and dormers.
Counter flashing is often used to flash chimneys.
