The flashing material should be 4 inches by 7 inches in length when it lies on the roof deck.
Step flashing for roofing.
Even if one piece of step flashing fails the flashing and shingle below it start the process over again.
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Step flashing is used to provide a water tight connection where roofing adjoins a vertical juncture.
Roof flashing chimney flashing aluminum flashing roofing shingles 50 in.
Install the step flashing before running the first row of shingles install a piece of step flashing along the sidewall so that it sits tightly against the roof.
Step flashing can be made with aluminum copper lead galvanized steel or.
Step flashing needs to turn up a minimum of three inches up the sidewall.
This flashing is typically field fabricated from a sheet of 26 ga.
Or greater step flashing aluminum step flashing.
Once complete the housewrap should overlap the step flashing that s applied to the wall.
Step flashing redirects the water back onto the shingle.
Bent into an l shape.
Second step flashing needs to extend 8 to 14 inches above the shingles according to the national roofing contractors association nrca.
Next l shaped pieces of metal typically aluminum are placed under each shingle that butts up against the vertical wall.
First step flashing must be installed before the siding so that the siding can cover the top of the flashing.
The 7 inch length ensures a 2 inch headlap on each course.
Item 831018 model 4916sp 30.
Base flashing and step flashing the waterproof membrane laid down before the shingles forms the first layer called the base flashing.
Galvanized sheet metal bent at a 90 degree angle i e.
Align the step flashing with the leading edge of the starter course and nail it in place using one nail in the upper corner.
If this is a repair job the siding must also be removed and replaced with the flashing.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
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