Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
Roof to wall flashing over shingles.
Then nail the new l shaped flashing under the builder s felt but above the fascia board.
Also consider ice guards even if you don t have gutters.
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.
The correct way to flash at the shingles in the area you indicated is using step flashing.
Where you meet a chimney or side wall install step flashing.
How to install roof flashing against a wall.
Step flashing step flashing redirects the water back onto the shingle.
In some cases you ll have to remove the siding.
When it comes to the cosmetics of your roof the trim is the most important aspect.
Step flashing is made up of each piece is slid under a shingle tab going up the roof.
You ll need to pry the siding outward to slip in the 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.
To make corner flashing take your tin snips and cut a 45 degree line from an outside corner to the center fold.
Step flashing fits to each course of shingles and appears to step up the wall of the chimney.
Begin by removing the shingles at the affected area and removing old flashing if present.
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.
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.
Have to pull some nails if the shingles are existing.
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.
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.
All of the edges must be wrapped with flashing which improves the appearance and provides resistance against rain snow and wind.
Don t mistake this condition for headwall flashing routed beneath the shingles and call it a defect.
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.
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