BATT INSULATION · SPOKANE
Trusted Batt Insulation Installation Service Provider in Spokane, WA
Fiberglass batt insulation for new construction and remodels across Spokane, Spokane Valley and North Idaho. R-21 in walls, R-38 over crawl spaces, fitted properly into every bay.
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Usually back to you within the hour. Or call (509) 200-7677.Goes straight to our phones and email. We don’t sell it or put you on a marketing list. Privacy policy
FIBERGLASS BATTS
Premium Fiberglass Batt Insulation
Fiberglass batt insulation is one of the most effective and affordable insulation solutions available for homes. Professionally installed batts create an efficient thermal barrier in walls, ceilings and floors, and they’re the natural choice whenever the framing is open. Therma-Lock provides professional batt insulation installation designed to improve energy efficiency, indoor comfort, and long-term performance. For an existing attic or a finished wall, blow-in insulation usually does the job better.
Whether you’re insulating a new construction project or upgrading existing insulation in a remodel, we fit every bay properly — cut around wiring and boxes, no gaps, no compressed corners. R-21 in walls and R-38 in the floor over a crawl space.
Insulating open walls on a build or remodel? See wall insulation →
Walls
R-21 fiberglass batts, the standard for new builds and remodels.
Floors over crawl spaces
R-38 under the floor — the fix for cold floors.
New construction
We do the insulation on local builders’ custom homes.
Garages & shops
Garages and shops. We don’t do pole barns or metal buildings.
Why Choose Therma-Lock For Batt Insulation
Therma-Lock Insulation provides professional batt insulation services throughout Spokane and North Idaho. We focus on precise fitting, clean installation and dependable results.
You talk to the same people, start to finish
We answer our own phone. If we’re up in an attic and it goes to voicemail, you’ll hear back within the hour.
Honest advice, even when it costs us the job
If your insulation is clean and dry and simply thin, you need a top-up, not a removal — and we’ll quote you the cheaper job.
Insulated to R-60, not to “good enough”
R-60 in the attic, R-21 in walls, R-38 over a crawl space. That’s what Eastern Washington and North Idaho actually need.
Old insulation still up there?
If what’s in your attic has had rodents in it, been through smoke, or got wet, putting new insulation on top buries the problem. That job starts with taking the old material out.
What we insulate to
Attic
R-60
Floor over crawl space
R-38
Fiberglass BIBS in a wall
R-23
Walls, batts
R-21
Eastern Washington and North Idaho. Most houses here built before about 2010 are well short of these.
How it goes
- Free on-site look, in a day or two.
- Baffles at the eaves so the roof keeps breathing.
- Gaps and penetrations sealed before anything goes in.
- Installed to depth, with markers left so you can check it.
- We clean up and take everything with us.
COMMON QUESTIONS
Batt insulation, answered
Batts or blow-in?
Batts when the framing is open — new builds, remodels, floors over a crawl space. Blow-in for attics, where it fills gaps a batt can’t reach. In open walls, Fiberglass BIBS is the step up from batts: blown in behind netting, R-23.
What R-value do you use in walls?
R-21 fiberglass batts in walls, and R-38 in the floor over a crawl space — what Eastern Washington and North Idaho need.
Do you work for builders?
Yes. We do the new construction insulation for local builders, and we’re happy to be your insulation sub.
Do you insulate garages and shops?
Yes — garages and shops. We don’t do pole barns, metal buildings or commercial buildings.
Building or remodelling?
Give us a ring before the drywall goes up. Professional batt insulation installation, fitted properly.