How To Counter Flash A Roof

However it s important to check for damage anyway.

How to counter flash a roof.

Beyond the dormer and cut the top section along the dormer edge. Use the grinder to cut a 1 inch deep slot into the mortar joint to install the flashing. Coat the flashing with a zinc based primer followed by two or more coats of spray on rust preventive metal paint. There are two good ways to handle corner flashing.

But it doesn t work that way. With either installation practice it prevents water from penetrating the flashing and seeping in behind your step flashing. Once even a small section of roofing cement fails you ll have a leak. Run the base flashing 4 to 5 in.

Step 1 cut the mortar joint to effectively install the counter flashing you ll have to remove the mortar joint along the step flashing and create what is called a reglet. Brick or counter flashing installed multiple ways. It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing. First use a stiff wire brush and solvent to clean the surface of any dirt debris or corrosion keep solvent away from asphalt shingles.

When working with step flashing this may involve removing undamaged pieces of flashing as well. Either cut into the brick or nailed against it and sealed along the top and top front half. If you find damage then you will have to get it. Counter flashing is necessary to prevent water that runs down the outside face of flashing from going behind the base flashing.

You may want to paint the flashing to match the roof. The first bending two pieces and caulking the joint photos 1 3 is the most common because you can do it on the spot with the flashing at hand. Be sure to follow the. Cut a slot of about 1 5 inches into the brick with a circular saw and masonry blade.

Use your caulking gun to caulk a straight line above the back of the base flashing.