However always consult your local building authority for exact code requirements.
Nails or staples for roofing felt.
Although staples are allowed in some jurisdictions they do not provide the same holding power.
Staples can be used for tacking it down but not recommended to hold.
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Felt staplers are designed for roofing felt housewrap insulation weather stripping light wood assembly and more.
Put fasteners at least every 8 inches.
Cap nails are typically made of steel and feature a plastic cap to prevent roof leaks hence their name.
Others will tell you that cap nails are more effective.
Both options often depend on the slope of the roof itself.
Use a construction stapler or a hammer.
When estimating nail or staple usage for your roofing project you should budget 400 nails or staples per square.
Roll out about 10 feet of felt and fasten with staples or roofing nails with plastic washer heads.
The reason they want you to use felt nails is to prevent blow offs if left exposed or high wind areas.
Many roofers will tell you that staples are fine for installing the synthetic underlayment.
Back in the day all i used was staples and or roofing nails now plastic tops are the norm.