Leaking through Nail or Staple Holes

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March 2, 2023 at 5:56 p.m.


Debbie from CA asked:

Attaching the synthetic underlayment is done with nails or staples. Can water seep in at the nail hole or staple hole?

March 2, 2023 at 5:58 p.m.


This is what roofing expert John Kenney from Cotney Consulting Group had to say in response to your question:

Synthetic roofing underlayments must be installed with either cap nails or staples. These underlayments do not seal around the fasteners, so they are considered water-resistant and not waterproof.

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