Crawl space insulation in Bellingham WA - warmer floors, with the checks done first
Cold floors usually mean heat is slipping into the crawl space. We insulate it in the right order so your floors feel warmer.
- I come look first I come out myself and show you what's down there.
- Walls or floor, together We pick where the insulation goes with you, not for you.
- Safety checks first Gas equipment and old pipe wrap get checked before anything closes.
- A plan in order Every step listed in the order we'll do it, and why.
- Licensed and fully insured.
- Free on-site estimates.
- Expect a reply within 1 business day.
How do you know your crawl space needs insulation?
These are the things homeowners notice first, usually in the rooms above. Catching them early means we fix the cause before damp or cold does more damage.
Cold floors in winter
The floor feels cold even with the heat up, which usually means nothing is slowing heat on its way down. Waiting just means paying to heat the crawl space.
Drafts near the baseboards
You feel air moving along the floor edges or around pipes coming up through it. Those gaps let crawl space air into your rooms, and insulation alone won't stop it.
Insulation hanging from the joists
Batts sagging down or lying on the dirt have stopped doing their job. They usually fell from damp or a loose fit, and they hold moisture the longer they sit.
A musty smell inside
A damp, earthy smell in the rooms above usually starts below, where bare ground gives off moisture. Leave it, and the wood and any insulation down there stay wet.
Torn or missing ground plastic
If the plastic sheet over the dirt is ripped, bunched up or gone, ground moisture comes straight up. It's worth fixing before anyone adds insulation.
A power bill that keeps climbing
The heat runs more and the power bill climbs, but the rooms over the crawl space stay cool. Heat is probably going out through the floor every day you wait.
How we do crawl space insulation
Thermal Bellingham Insulation Company is based in Bellingham and works in the cities around it across Whatcom and Skagit counties, and every crawl space insulation job we take starts the same way. I crawl in first and look for two things: gas equipment that draws its air from down there and old wrap on the pipes and ducts, because both have to be sorted out before we close anything up. Old wrap can contain asbestos, so if we find any, a certified abatement firm has to inspect it and pick the treatment before our crew goes further. Then we decide with you whether the crawl space walls or the floor above should carry the insulation, our crew seals the holes where pipes and wires pass through the floor, and the insulation goes in last so it isn't fighting a draft. The price mostly moves with the size of the crawl space, how easy it is to work in, walls or floor, foam or batts, and whether old material has to come out, and the schedule turns on what those first checks turn up. Your estimate comes as a written plan that lists each step in the order we'll do it.
Crawl space work often ties into the rest of the house. If drafts also come in around outlets, windows and the attic hatch, our air sealing services close those gaps the same way we close them under the floor. When the rooms above still feel cold through their outside walls, wall insulation is usually the next thing to look at, and I can check both on the same visit.
What happens after you call about your crawl space?
Here's how a crawl space job runs with us, from your first call to the walk-through once our installers pack up.
Call, then I come out
You call or send a request, and I come out myself to crawl in with a light and show you what I'm seeing down there.
Get your written plan
You get a written plan that puts each step in order and says why it comes there, with the checks listed before any insulation.
Our installers do the work
Our installers follow the written plan step by step. If they find something the plan didn't cover, I talk it over with you before anything changes.
Walk through it together
I walk through the finished job with you and show you what went in down there, so you know what was done and why.
Why Bellingham homeowners call Thermal Bellingham Insulation Company
The owner comes out first
I look myself and build the plan with you, so the installers work from what we agreed on.
Checks first, then insulation
I started this business in 2023, after years scheduling contracting jobs, so our plans put the checks first.
Licensed and fully insured
Washington requires construction contractors to register with the state Department of Labor & Industries, and you're welcome to ask about ours.
Backed by our satisfaction guarantee
Tell me at the walk-through if anything isn't what you expected. To get started, call (360) 255-0276 or use the form.
Get a written plan for your crawl space
Tell us roughly how big the crawl space is, whether it has vents and what equipment sits down there. We reply within one business day to set up your free on-site estimate, with no obligation.
Examples of crawl space work
Look through these examples of crawl space work to get a feel for what walls, floors and ground plastic look like once they're done.
Crawl space insulation questions
Here are straight answers to what people ask us most about crawl space insulation. If your crawl space has something odd going on, ask about it when you call.
Should I insulate my crawl space walls or the floor above?
Federal energy guidance calls sealing and insulating the crawl space walls the best practice, because it connects the crawl space to the rest of the house. In some houses the floor above works better as the line between heated and unheated space, so we settle that with you on site. If wall insulation will be left exposed, installer guidance calls for a fire-rated material, which can narrow what you pick.
Can I just close my crawl space vents?
No, closing the vents alone isn't enough to turn a vented crawl space into a sealed one. On its own it can raise moisture, and if fuel-burning equipment that vents naturally, like a furnace or water heater, sits down there, it can create a deadly situation. The state's residential code lists what lets a crawl space go without vents, such as a sealed vapor retarder with a radon system or continuous exhaust to the outside, so we plan that whole change before any vent gets closed.
Is a plastic ground cover required in a Washington crawl space?
Yes, in most cases. The state's residential code calls for black polyethylene sheeting over the ground, reaching the foundation wall, unless the crawl space has a concrete slab floor at least 2 inches thick. A sheet laid well also helps keep down ground moisture and soil gases like radon, so we check yours before the insulation goes in.
How much does crawl space insulation cost in Bellingham?
Insulating a crawl space usually costs about $3 to $6 per square foot across the US, which is a national figure for the work and not our price. Your number depends on the choices in your plan, so have a rough size of the crawl space handy when you call, and you'll get a written estimate after the visit.
What causes cold floors over a crawl space?
Cold floors usually come from heat moving down into space your house doesn't heat, and floors over that kind of space can be one of the main places a house loses heat. Gaps where pipes and wires come up through the subfloor, the wood layer under your flooring, make it worse because cold air comes straight in. A look underneath usually shows which it is.
How do I get my crawl space ready for insulation?
Clear out stored boxes and debris, because any new ground plastic needs to cover the floor completely. Make sure we can reach the access hatch, and if you know of gas equipment or old wrapped pipes down there, mention them when you call.
Crawl space work around Bellingham
Bellingham's Permit Center takes building applications there, and before scheduling we ask the office covering your address whether your job needs a permit. Pick your area or call us.
Call about your cold floors and crawl space
We take calls until 11 PM on weekdays and 10 PM on weekends, so reach us at (360) 255-0276 once you're home.