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.
Roofing felt nails or staples.
When the shingles are installed the felt is not going anywhere.
Before applying roofing you ll need to cover the sheathing with roofing felt also often called tar paper most local codes call for using 30 pound felt.
Nail the felt in using 0 59 inch 15 mm galvanized clout nails.
Both nails and staples should be long enough to penetrate the roof sheathing by 3 4 inch or penetrate 1 4 inch through the sheathing if it is less than 3 4 inch thick.
In addition these plastic cap nails can be used to install foam board insulation.
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Fasteners should be driven straight and flush with the shingle surface figure 2 10 above courtesy of steven bliss best practices guide to residential construction.
The reason they want you to use felt nails is to prevent blow offs if left exposed or high wind areas.
With staples or plain roofing nails the heads can sometimes tear right through the underlayment.
Breaking it down further you ll typically use four fasteners per 3 tab shingle.
Staples can be used for tacking it down but not recommended to hold.
Start by stapling a row in the middle of the new roofing felt section.
However depending on local roofing and fire codes it may be appropriate to secure synthetic underlayments with staples.
Back in the day all i used was staples and or roofing nails now plastic tops are the norm.
Grip the hammer tightly by the end of the handle and hold your thumb at the top of the shaft.
A 11 galvanized steel staples 5000 count model 0940042 4 43 4 43.
Put fasteners at least every 8 inches.
Smooth out wrinkles as you progress to eliminate spots that could trap moisture and cause problems in the future.
Roll out about 10 feet of felt and fasten with staples or roofing nails with plastic washer heads.
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Start at one of the upper corners of the felt and continue along the perimeter.
However always consult your local building authority for exact code requirements.
When estimating nail or staple usage for your roofing project you should budget 400 nails or staples per square.
Place the replacement felt over the exposed area of the roof and secure using the arrow htx50 professional hammer tacker and 1 2 t50 staples.