Cold air coming inside is usually one of the first signs something isn’t sealing properly anymore. In Everett, WA especially, older frames and worn weatherstripping can let drafts through even if the glass looks fine. I found it helpful to read more about what to expect during window replacement Everett because it explains how professionals check for gaps, insulation issues, and frame damage. Sometimes it’s a small fix, but other times it really does mean the windows are at the end of their lifespan.