Posted march 4 2017 filed under roof installation roof repair maintenance.
Step flashing at roof height.
This membrane attaches up the side of the wall as well.
Step flashing step flashing redirects the water back onto the shingle.
Vertical flashings must be a minimum of 8 inches above the completed roof surface.
Roof felt should be installed prior to installing the step and kick out flashing.
Step flashing should be extended at least 4 inches up the wall from the roof deck and at least 4 inches out along the roof deck 2015 international residential code irc.
Step flashing is used where a roof meets a wall to cover the junction of those elements preventing leaks.
This layer is called the step flashing.
Even if one piece of step flashing fails the flashing and shingle below it start the process over again.
This flashing is typically field fabricated from a sheet of 26 ga.
Step flashing size requirements vary according to manufacturer.
This height has become the industry standard and is recognized by most membrane manufacturers.
Step flashing is used to provide a water tight connection where roofing adjoins a vertical juncture.
How to install roof flashing against a wall.
Galvanized sheet metal bent at a 90 degree angle i e.
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.
If this is a repair job the siding must also be removed and replaced with the flashing.
Next l shaped pieces of metal typically aluminum are placed under each shingle that butts up against the vertical wall.
The 7 inch length ensures a 2 inch headlap on each course.
The flashing material should be 4 inches by 7 inches in length when it lies on the roof deck.
Flashing is a strip of metal usually aluminum about 8 inches long and bent at 90.
Step flashing if made of metal should be galvanized steel at least 0 019 inches thick irc 2015.
One side of the l shape lays under the shingle and the other side attaches to the side of the wall.
Step flashing needs to turn up a minimum of three inches up the sidewall.
The 8 inch height prevents water from pouring over the top of the flashings into the building or system.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
Step flashing should be integrated with the drainage plane above for example overlap housewrap over it.
First step flashing must be installed before the siding so that the siding can cover the top of the flashing.
