Place the flashing between the joint of the house and the roof. The flashing on the wall should be flush against it, and the porch roof portion should be on top of the shingles. Nail the flashing securely in place using roofing nails. Try to keep the nails as flush as possible to the edges.
Does flashing go over or under shingles?
Flashing should overlap the roof-covering material, but on asphalt shingle roofs, for aesthetic reasons, the part of the headwall flashing that extends down over asphalt shingles is often covered with a course of shingle tabs.
Do you need Flashing on a covered porch?
“Flashing is required where exterior porches, decks, or stairs attach to a wall or floor assembly of wood frame construction.
Can you add flashing to an existing deck?
Installing deck flashing is not that difficult to do, even if the deck is already built. You will need to remove a deck board, or a section of deck boards pending if the deck boards run parallel or perpendicular to the deck ledger board.
Should you caulk flashing?
It is generally not a good idea to use caulking on wood siding. … Flashing acts as a waterproofing layer for this type of siding, and caulking will prevent the flashing from doing its job. As far as trim boards are concerned, you should not caulk around these areas if they sit on top of the surface of your siding.