Step flashing built to protect joints between roofs chimneys and other objects like skylights this flashing steps up above the shingles and attaches to the object providing comprehensive water protection.
Roof to wall flashing over shingles.
That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.
The flat roofing material must go up the wall a minimum of 12 or up the wall and over the top of the wall if the wall is less than 12 high.
Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.
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.
Here is an attempt though maybe not a very good one to make the roof flashing serve also as a through the wall flashing with a tile roof.
Step flashing fits to each course of shingles and appears to step up the wall of the chimney.
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 shall be a minimum of 4 inches 102 mm high and 4 inches 102 mm wide.
Step flashing redirects the water back onto the shingle.
Flashing against a vertical sidewall shall be by the step flashing method.
Yes you can install a metal roof over shingles.
Proper roof wall flashing example.
Before you reshingle a roof read our step by step guide for adding new shingles over old ones.
However you ll want to check with your local building department before you make any decisions.
Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.
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.
Flashing can be purchased in pre formed styles to help you install it more easily and these include.
To install the roof wall flashing above the builder bent the top edge of the flashing into a 90 degree lip about 2 cm in width.
Building officials in some areas will only allow a re roof over one layer of shingles while officials in other places may allow you to place the roof over two layers of 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.
Don t mistake this condition for headwall flashing routed beneath the shingles and call it a defect.
