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.
Roof to wall flashing over shingles.
You ll need to pry the siding outward to slip in the flashing.
Do a google and.
Also consider ice guards even if you don t have gutters.
Even if one piece of step flashing fails the flashing and shingle below it start the process over again.
How to install roof flashing against a wall.
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.
In some cases you ll have to remove the siding.
Use roofing nails to install the l shaped flashing flush with the roof and wall then cover it with roofing cement and reattach the roofer s felt.
All of the edges must be wrapped with flashing which improves the appearance and provides resistance against rain snow and wind.
Where you meet a chimney or side wall install step flashing.
Install your underlayment completely and your shingles up to where the wall begins so that the first piece of flashing or the corner flashing will rest on a shingle.
Don t mistake this condition for headwall flashing routed beneath the shingles and call it a defect.
To make corner flashing take your tin snips and cut a 45 degree line from an outside corner to the center fold.
Step flashing should be installed as individual pieces for each course of shingles starting at the bottom of the chimney or wall.
Vent pipe flashing fits over flues or pipes.
When it comes to the cosmetics of your roof the trim is the most important aspect.
Apply a shingle then a piece of flashing then a shingle and so on so that each piece of flashing rests on top of the lower course and is covered by the upper course.
Begin by removing the shingles at the affected area and removing old flashing if present.
The first piece of step flashing over the unexposed portion of the shingle next to the lower edge of the chimney or it should be placed at the starter course of shingles along a wall.
Then nail the new l shaped flashing under the builder s felt but above the fascia board.
The correct way to flash at the shingles in the area you indicated is using step flashing.
Step flashing step flashing redirects the water back onto the shingle.
Step flashing fits to each course of shingles and appears to step up the wall of the chimney.
The shape of vent flashing is typically a cylinder with a wide flange at the base which is lapped into the shingles as the roofing is installed.
