Cold floors upstairs almost always trace to what is below: vented crawl spaces and uninsulated basement walls that keep the whole first floor sitting on a cold plate all winter.
Coastal Insulation Co insulates and air-seals basements and crawl spaces — rim joists foamed, walls insulated, crawl spaces encapsulated with vapor barriers where moisture calls for it.
The leakiest framing in most homes. Closed-cell foam here is one of the highest-payback jobs we do.
Vapor barrier, sealed vents, and insulated walls turn a damp, cold crawl into conditioned space — and protect the floor above.
We address water and humidity first; insulating a wet basement just grows mold with better R-value.
Moisture and air-leak inspection below grade
Scope: rim joists, walls, vapor control, ventilation
Installation — typically 1–2 days
Humidity check and documentation
Usually an unsealed rim joist and uninsulated foundation below. Fixing those typically warms first-floor surfaces by several degrees without touching the thermostat.
In our climate, sealed and conditioned nearly always wins — venting pulls in humid summer air that condenses on cool surfaces and breeds mold.
Written pricing, no obligation, no pressure.
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