Proper Roof Flashing Installation

How to install roof flashing against a wall.

Proper roof flashing installation.

Proper installation of step flashing. These areas include anywhere there are intersections or joints such as edges around chimneys vents skylights roof valleys and soil stacks. When you install roof flashing you will need to use a sealant. It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling.

Step flashing redirects the water back onto the shingle. Fasten loose nails and cover exposed nail heads with roofing cement. If nailed to both the flashing may deform under the pressure from shifting brick or wood. Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing.

While roofing professionals occasionally use nails when flashing they must choose whether to nail to the roof plane or the vertical wall. Place it so the tab of the end shingle covers it completely. Recaulk the joints between the roof and the flashing. Secure the horizontal flange to the roof deck using two nails.

Install the step flashing pieces so that they can easily be replaced during a reroof job or else the damaged old. As a protectant flashing is placed anywhere on the roof s surface that requires extra protection. Even if one piece of step flashing fails the flashing and shingle below it start the process over again. Step flashings are to be installed one per course.

Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. The roof deck flange of step flashings are to be fastened to the surface of each shingle in a position whereby the next course of shingles will cover up hide the flashing from view. To install the flashing piece on the first course place it over the end of the starter strip. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.

You will also need rake edge flashing for the sides of the roof. However when flashing crowne slate with its much larger 10 exposure the flashing piece would need to be 10 x 12. Nail metal flashing called drip edge along the bottom edge of the roof deck near the gutters. The flashing integrates the roof cladding into the wall cladding to keep water out.

Make sure to install flashing around the chimneys and walls.