The corner cut should be facing upwards.
Porch roof to wall flashing.
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.
Metal flashing is very effective and when properly installed can help accommodate roof chimney wall or structural movements due to settling expansion and contraction.
The flashing on the wall should be flush against it and the porch roof portion should be on top of the shingles.
Traditionally the flashing was installed and hidden under the siding.
Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration.
There is another place that roof flashing has now invaded.
Nail the flashing securely in place using roofing nails.
If you nail on the inside it will damage the flashing and make it less effective.
If you already have faulty flashing installed you.
Try to keep the nails as flush as possible to the edges.
How to install porch roof flashing step 1.
It is at the back of the porch roof where the roof meets the house siding.
Measure the length of the porch roof joint to determine how much flashing you will need.
Prepare the area where you will install the roof flashing.
Click to enlarge make sure the sheathing wrap overlaps all step flashings.
Lay the cut flashing down at the corner over a shingle that is already in place.
Flashing a patio roof ledger unless it will be protected from rain by the house s eaves or a solid roof a roof ledger that is fastened directly to a house with wood siding should be capped with galvanized metal z flashing that tucks up under siding to prevent water from seeping in behind it.
Gently hammer the 45 degree cut around the corner of the porch roof seam.
Flashing is installed to surround roof features such as vents chimneys and skylights.
That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.
Step flashing all flashings must integrate with adjacent materials so water always flows to the exterior following the shingle principle.
Roll flashing to help prevent leaks corrosion resistant metal flashing is typically applied.
