For the valley areas of the roof you will be using valley flashing.
How to install aluminum roof flashing.
It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing.
Step 3 install the flashing.
Install the underlayment as directed by the manufacturer then set the valley flashing on top of it.
For exposed fasteners avoid over tightening the fastener.
Place corner pieces where panels will meet bends at the edge of the roofing.
Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are.
The remaining siding on the sidewall will overlap the step flashing and nail.
Step flashing on roof peak.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
This helps to prevent water from sliding around the aluminum flashing and into the roof area.
Once even a small section of roofing cement fails you ll have a leak.
Most flashing is 8 inches wide.
Space the screws about 12 in 30 cm apart.
Use your neoprene washer head screws to secure the metal to the sheathing.
Especially if you live in an area that gets a lot of snow and ice.
Also install at the valley of the roof where it joins up with other parts of the roof.
Before you apply the flashing you ll need to lay down a waterproof membrane.
Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.
But it doesn t work that way.
Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint.
Bend the corner flashing tightly around the corner.
To get the best from the flashing you should fit of the sheet onto the side of the roof and the other half onto the building or addition which it is touching.
If you do not wish to form your own corner flashing you can buy pre bent pieces and cut them to size or use a piece of corrugated aluminum which is easier to bend.
If there are gutters installed on the eaves the eave flashing should be installed to overhang the lip of the gutter by about 1 2 inch.
Install the step flashing when the siding is installed it should be tucked behind this piece and then consecutive courses lapped over it.
Roof shingle over step flashing.
