More than 1 layer of roofing not recommended over 3 8 sheathing.
Roofing nail length for ridge vent.
For dimensional shingles being installed over a layer of existing dimensional shingles you should always use a 1 1 2 inch roofing nail.
An 8d nail 2 5 inches long is the minimum size nail to use for fastening sheathing panels.
A premium rigid style vent with 3 76 mm ring shank nails that helps exhaust heat and moisture from your attic available in warmer climates.
Start by removing the nails holding the ridge cap shingles in place.
On the roof on my rental property removed the ridge vent in favor for turtle vents.
Remove the shingle caps.
Have heard of more compaints with ridge vents than turtle vents.
Large heads prevent pull through.
Install new field shingles.
This gives you 450 square inches of total exhaust.
Apply the subsequent cobra 4 1 21 m plastic ridge vent sections over the length of the ridge using the overlap underlap tabs figure g.
Multiply it by 18 square inches the net free air per foot of ridge.
Also great for application of shingles over rigid foam insulation into roof decking and for the installation of ridge vents.
Nail the ridge cap shingle five and five eighths inches above the butt edge one inch in from each edge.
Full round heads are recommended to avoid head pull through.
Would much rather put down metal lomanco s though.
A premium rigid style vent with 3 76 mm ring shank nails that helps exhaust heat and moisture from your attic available in warmer climates.
Install the ridge vent shingle over style install the ridge vent aluminum.
If your decking is less than 3 4 inch then a 1 1 2 inch nail will suffice.
There s no vault so no need for that ugly ridge vent.
These extra long asphalt shingle nails are designed for the application of structural roof deck to wood trusses or rafters.
Ring shanks provide exceptional holding power.
I only use airvent certianteed ridge vent with 2 5inch hand nails.
For most asphalt shingle ridge caps there are two.
Cut the ventilation opening.
To calculate an example of exhaust and intake use 25 feet of roof ridge vent.
Nails must always penetrate through plywood and osb decks or at least 3 4 19 mm into wood planks.
Vents evenly spaced underneath the roof provide intake.