Caps are a recommended installation best practice by housewrap and roofing underlayment manufacturers
Each 3/8 in. staplepac covers approximately 25 square feet
Caps help seal out moisture that can penetrate sidewall and roofing fabrics
Combination of caps and staples reduces the possibility of tearing roofing felt or housewrap
Caps provide better holding power than a nail or staple alone
Fewer fasteners needed and fewer staple holes
Reduces lateral slippage
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