Bend the corner flashing tightly around the corner.
How to flat roof flashing.
If you are working with valley flashing lift the edges of the surrounding shingles and spread roofing cement on the flashing about 6 inches in from the edge of the shingles.
Two ways to flash roof edges.
Flashing is critical to certain areas of your roof namely the places where the roof surface meets a wall sidewalls and front walls the low points where two roof slopes meet called valleys roof protrusions bathroom kitchen vents skylights and the roof s edges rakes and eaves.
When applying the cement you want to apply a very liberal quantity.
Details concrete masonry roofing wrb flashing.
As you lift the shingles apply the cement to the back of the shingle about six inches in.
Fasten loose nails and cover exposed nail heads with roofing cement.
Locate all of the areas around the flat roof where water can potentially enter.
Flat roof flashing is also installed around the perimeter of the roof to protect the underside of shingles.
Recaulk the joints between the roof and the flashing.
Purchase the cement in a tube that will fit your caulk gun.
Nail it in place with two nails one on each side of the top edge.
Ensure it sits flat and extends at least 8 inches above the shingles.
It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling.
When fitting cover flashings to a flat roof like the one pictured bottom right there is no need for the third covering angle of lead the lead is simply cut just above the flat roof to stop capillary action and the flashing cutting into the flat roof itself.
Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing.
Look for the chimney or any type of pipe coming out of the building.
Of course you don t want cement oozing all over your roof but you do want to ensure a strong seal.
Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.
This can be a source for anything from smoke to steam.
Step flashing on roof peak step three.
