If your floors are cold all winter, the problem is almost always the crawlspace. A huge number of Bellingham homes have a vented crawlspace with bare dirt and old fiberglass batts that have sagged, fallen, or rotted off the joists. Cold, damp air moves up through the floor, and the ground moisture under the house keeps everything wet. You feel it as cold feet and a house that never quite warms up.
We fix both halves at once. We lay a ground vapor barrier across the dirt to cut off the moisture coming up from the soil, then insulate between the floor joists up to about R-30, which is what WA energy code wants under the floor. We use the right material and install it so it stays put instead of falling down in two years. Floor and crawlspace insulation is rebate-eligible through PSE, so we size it to qualify and handle the paperwork.
What it actually costs.
Crawlspace & Floor Insulation $1,800 to $5,000
Square footageBigger footprint, more barrier and batts
ClearanceA tight crawlspace is slower, harder work
Existing conditionRemoving wet, fallen old batts adds labor
Ground moistureStanding water may need drainage before we insulate
Our four-step process.
Free crawlspace assessment
We get under the house, check the moisture, the old insulation, and the joists, and figure out what the floor and the ground both need.
Clear and lay the barrier
We pull out any wet, fallen, or fouled old batts and lay a ground vapor barrier across the dirt to stop moisture coming up.
Insulate the floor to R-30
We fit insulation between the floor joists up to about R-30 and secure it so it stays put.
Rebate paperwork
We help you file the PSE or weatherization rebate for the floor and crawlspace work.
Why hire a local crew for this work.
Warmer floors over the crawlspace
Ground vapor barrier to cut off soil moisture
Floor insulation to about R-30 per WA energy code
Old wet or fallen batts removed, not covered over
Rebate-eligible through PSE, and we help with the forms
Frequently asked questions.
How much does crawlspace and floor insulation cost in Bellingham?
Crawlspace and floor insulation in Bellingham usually runs $1,800 to $5,000. The price depends on your square footage, how much clearance the crawlspace has, and whether old wet batts need to come out first. Floor and crawlspace work is rebate-eligible through PSE, which lowers your out-of-pocket, and we help you file.
Why are my floors cold even though my attic is insulated?
Because the heat loss and the cold air are coming from underneath. A vented crawlspace with bare dirt and missing floor insulation lets cold, damp air move up through the floor all winter. Insulating the attic doesn't touch that. We insulate the floor to about R-30 and lay a ground vapor barrier, which is what actually warms up the floors.
Do I need a vapor barrier in my crawlspace?
In Bellingham, yes. Our ground stays damp most of the year, and that moisture moves up through bare dirt into the crawlspace and the floor above. A ground vapor barrier cuts it off, which keeps the new floor insulation dry and stops the musty smell. Insulating the floor without it is how you end up with wet, falling batts again.
Ready for a free crawlspace & floor insulation quote?
Tell us about your home, we'll reply within 15 minutes during business hours and set up a free assessment.
Crawlspace & Floor Insulation across Whatcom County.
Every neighborhood we serve has its own story, century-old walls in the Lettered Streets, cold floors over the crawlspaces in Columbia, damp ground out by the lake. Pick your area for local notes: