Why seal the screw holes when re-framing a deck?

Sealing screw holes when reframing a deck is mainly about preventing water from entering the wood around fasteners, reducing rot risk, and protecting the connections that hold the deck together. In Snohomish County's wet climate, that can help extend the life of the framing.

However, there's an important distinction: not every deck screw hole needs to be individually sealed. The correct approach depends on where the screw is installed and what waterproofing system you're using.