The flashing needs to be installed before installing the roof shingles the metal flashing is formed with a hook edge and cleated on 12 centers the flashing extends up the wall at least 4 the flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas.
Sidewall flashing shingle roof.
Epdm flashing tape with a butyl adhesive backing will help.
Apply drip edge and roof underlayment over the roof deck and continue lapping up the sidewall and over the water resistive barrier in this case rigid foam insulation a minimum of 7 inches figure 2.
The wall side of the flashing can either be covered over with siding or sealed with caulk.
Butyl tape should be applied where the foot of the flashing attaches to the roof.
It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing.
Each additional rain adds more water and before you know it you ve got rotted wood.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
But it doesn t work that way.
Sidewall flashing sidewall flashing is applied when the side of the roof butts up against an adjacent wall.
Vent flashing done right to prevent leaks back up roof vent boots with flashing counterflashing and proper shingling.