A headwall is a level junction where a roof meets a wall.
Step flashing vs roof to wall flashing.
Every asphalt roofing manufacturer s installation instructions that i have ever seen specify step flashing as the preferred way to flash the roof to wall juncture.
In contrast to step flashing the next layer is installed in a continuous strip.
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Code s eye view step flashing vs.
Bend it down and back to sit flat on the corner.
Step flashing step flashing redirects the water back onto the shingle.
Headwall flashing should extend up behind the exterior wall covering and down over the roof covering material as you see here.
Nrca berg points out that while continuous metal flashing is used at wall junctures in certain steep slope roof installations special flashing installation details are required that are different from a step flashing sealed roof and even when installed according to specifications this approach can leave the roof vulnerable to leaks or moisture damage from wind driven rain.
Make corner flashing from step flashing.
Then sink two nails in the wall near the top one on each face.
363 46 kb while the building code now allows you to install continuous flashing along a sloped roof to wall intersection the author cautions against it and.
Roof to wall 1 step flashing 5 material.
Multiple pieces of the flashing will be installed in layers with shingles to ensure the water flows away from the wall.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
Even if one piece of step flashing fails the flashing and shingle below it start the process over again.
Aluminum 3 galvanized steel 1 plastic 2 product length in 5 10 3 50 or greater 3 product width in 15.
And in section 905 which covers the installation of all roof coverings of the 2015 irc the first sentence requires compliance with the code and the manufacturer s.
This is true no matter what type of roof covering material is installed.
How to install roof flashing against a wall.
Learn how to install it below.
This final layer is called counter cover or cap flashing and commonly consists of aluminum galvanized steel copper tin or even plastic.
This illustration shows proper flashing at a headwall condition.
Step flashing is a rectangular piece of flashing bent 90 degrees in the center.
Corner flashing comes first.
It is used for roof to wall flashing.
It sits on top of the finished roof and covers the step flashing.
Once you ve shingled up to the sidewall cut a piece of step flashing at a 45ยบ angle from the outside corner to the bent seam.
