Install Step Flashing On Existing Roof

Here s how to do it right the first time.

Install step flashing on existing roof.

Once even a small section of roofing cement fails you ll have a leak. First step flashing must be installed before the siding so that the siding can cover the top of the flashing. Then sink two nails in the wall near the top one on each face. The first part of installing the step flashing is the installation of the corner flashing.

Each additional rain adds more water and before you know it you ve got rotted wood. Bend the 5 sides in half by hand until you have a right angle. But it doesn t work that way. The vertical flange of the flashing is to extend up behind the adjoining siding.

You will want to place the lower portion of the step flashing against the roof and the other edge goes around the corner edge. Cover tops of step. Step flashing is the most time consuming of all flashing jobs on the roof because you must complete it step by step as you shingle up the roof. Longer than the shingle s exposure.

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. Make corner flashing from step flashing. Wide and 2 in. In order to properly install new flashing you ll have to remove the shingles surrounding your old flashing and then re lay them after installation.

Lay a shingle over the step flashing starting at the roof edge. Typically flashing is installed using roofing nails and roofing cement. Fasten that shingle with two galvanized nails at the top then cover the top of it with another piece of step flashing nailed to the. Bend it down and back to sit flat on the corner.

It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing. Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. There are a few general best practices you need to know. Once you ve shingled up to the sidewall cut a piece of step flashing at a 45º angle from the outside corner to the bent seam.

Step flashings are to be installed one per course. Flashing is generally installed at any joints or edges in the roof where water could otherwise work its way in. Installing side wall step flashing 1. Nail flashing to roof deck only.

You will start by snipping one of your pieces of step flashing at a forty five degree angle. Purchase pre cut step flashing of cut your own step flashing pieces to be 10 in. Wide and 2 in.