Cut some membrane material to seal between the vent flashing and the roof and cut an opening for the vent.
How to apply flashing with a rolled roof.
Next place your vent flashing on top of the membrane.
It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing.
Bend the corner flashing tightly around the corner.
This aluminum flashing protects the edges of the roof sheathing from water.
Hammer nails into the rolled roofing to secure it.
You may want to paint the flashing to match the roof.
How to install polymer bituminous flashing.
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.
But it doesn t work that way.
First use a stiff wire brush and solvent to clean the surface of any dirt debris or corrosion keep solvent away from asphalt shingles.
Water can accumulate in the roofing or flashing on a flat roof causing ponding that will eventually result in rotted underlayment and a roof leak.
Install an asphalt roll surface with polymer bituminous flashing on a low pitched but not flat roof.
Roof flashing helps protect your roof from the elements and aluminum roof flashing is a cost effective style that will work as well as other types of flashing without costing you as much.
Once even a small section of roofing cement fails you ll have a leak.
Coat the flashing with a zinc based primer followed by two or more coats of spray on rust preventive metal paint.
Apply a thin bead of silicone around the opening of the vent pipe area and lay the membrane in place.
Step flashing on roof peak.
Provide 6 inches of overlap under each side of the flashing.
Lay it from the bottom of the roof to the top ensuring 4 inches of overlap at each base line.
The metal flashing must overlap the material not the other way around.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
Cut the sections of flashing with tin snips as needed and nail them to the roof with roofing nails or screw them with.
Ensure that you hammer the nails properly into the roof don t leave the nails sticking up above the layer.
Make sure you use a strong hammer and 1 inch 2 5 cm roofing nails.
