Roofhelp and all other professional roofing organizations consider properly nailed underlayment to be an important part of the roof assembly.
Roofing underlayment nails.
5 penny stainless steel shake shingle nail 5 lbs.
There have been several occasions where shingles have blown off in heavy thunderstorms or hurricanes but because the felt underlayment was nailed securely the damage to the interior of the building was minimized.
For the lower portion of the roof especially the part that overhangs the eaves and is susceptible to ice dams it is a good idea to apply self stick waterproof shingle underlayment wsu also called ice guard.
It acts a secondary waterproofing element plus it provides longevity for the roof system click here for a brief explanation.
Electro galvanized steel roofing nails 30 lb pack 14 x 1 3 4 in.
Plastic round cap roofing nail 3 000 pack 11 x 1 1 2 in.
All in all when you shingle the roof there are a gazillion more nails puncturing the underlayment.
Only use 1 diameter plastic cap roofing nails.
Underlayment nails 1 lb.
I personally do not leave roofs open for any longer then it takes me to roof them.
Acquire the grip rite 12 1 2 x 1 1 4 in.
Some roofers prefer to attach felt underlayment with 1 inch roofing nails or special nails with plastic washers but most codes allow staples which are easier to drive.
In normal wind zones.
In normal wind zones the nails should be driven at 6 0 o c.
12 x 1 in.
On center on both head and end laps.
Pack 114atul1 ringed shank 1 1 4 used to lay plywood or composition underlayment over wood floor or floor joists at the home depot.
Nail down squarely 90 degrees into the deck to secure caps flush to the underlayment.