Retrofit insulation in Bellingham WA - warmer rooms in the house you already have
Drafty rooms, cold walls and a power bill that won't settle? We fix what's wrong first, then add insulation where it's missing.
- I come out myself I look at your house and show you what I find.
- Problems found first We look for damp spots and old wiring before any insulation goes in.
- Gaps sealed before filling We close the gaps first so new insulation isn't fighting a draft.
- A plan in order Each step is listed in the order we'll do it, with why.
- Licensed and fully insured.
- Free on-site estimates.
- Expect a reply within 1 business day.
How do you know your house needs more insulation?
Most older houses show you where the insulation is thin or missing. Catching it early means you're adding insulation, not paying to pull out wet or dirty material first.
Rooms that feel drafty
You feel moving air near outlets, baseboards or the attic hatch. That usually means open gaps, and until they're closed, the heat you pay for leaks out.
Outside walls cold to the touch
Put your hand on an outside wall and it feels chilly. Many older houses were built with empty wall cavities, and every season you wait is heat lost through them.
Cold floors over the crawl space
Floors stay cold even with the heat up. The space underneath is often open and unsealed, so cold air sits right against the floor until it's sealed and insulated.
The room over the garage
It's too hot in summer and cold in winter. That room usually has thin or patchy insulation, so you pay to heat and cool a room nobody uses.
Matted or stained attic insulation
You see insulation that's flattened, dark or damp, or has droppings in it. That usually points to a leak or pests, and new material on top just buries the problem.
A power bill that keeps climbing
Your heating bill creeps up and the thermostat never seems to settle. Thin insulation and open gaps make the heat run longer, and that cost adds up every month.
How we handle retrofit insulation in an older house
Retrofit insulation is insulation added to a house that's already built, in the attic, the walls or under the floor over a crawl space. We're based in Bellingham and work in the cities around it across Whatcom and Skagit counties, and in an older house I start by finding what needs fixing first, like damp spots or old wiring, because insulation laid over a problem only hides it. Then our crew does the air sealing, closing the gaps around pipes, lights and the attic hatch, so the new insulation isn't fighting a draft. After that the insulation goes in, as deep at the edges as in the middle, with the eave vents left clear so the attic can still breathe. If you're planning new siding, I'll suggest doing the walls at the same time, since the holes for filling them can go in from outside while the siding is off. What you'll pay and how long we're there depend mostly on what that first check turns up and how much of the house needs work, and the estimate on site is where you get your own number.
Most retrofit jobs start overhead, and our attic insulation work covers sealing and topping up what's already up there. Spray foam insulation seals air and insulates in one step, but it costs more, so I usually suggest it where ductwork runs through the attic, and for the rest, sealing the gaps and topping up with loose fill blown in through a hose does the job for less.
What happens when you call about retrofit insulation in Bellingham?
Here's how a retrofit job runs, from your first call to the walk-through at the end, with the checks done before any work starts.
Call and get a visit
You call or send a request, and I come out myself to look at the attic, walls and crawl space, showing you what I find.
Get a written plan
You get a written plan that lists each step in the order we'll do it and says why it comes there. Fixes come before insulation.
Our installers do the work
Our installers seal gaps first, then add the insulation in the plan. Keep kids and pets out of work areas until the crew says they're clear.
Walk through the finished job
When the work's done, I walk through it with you and show you what went where, so you know what's in your walls and attic.
Why Bellingham homeowners call Thermal Bellingham Insulation Company
I come out to your house
I look at the job myself and build the plan with you, so the person planning the work has seen your house.
Based in Bellingham since 2023
We've worked out of Bellingham since 2023, and most of our calls come from drafty or older houses that need this work.
Licensed in Washington, fully insured
We're licensed and fully insured, so you aren't carrying the risk while our installers work in your attic, walls and crawl space.
Checks first, then insulation
Years of scheduling jobs for a busy contractor showed me what goes wrong out of order, so your plan starts with checks.
Get a written retrofit insulation plan for your house
Tell us your house's age, how you reach the attic and anything you've noticed, like damp insulation, old wiring or possible vermiculite. We reply within one business day to set up your free on-site estimate, with no obligation.
Examples of retrofit insulation work
Look through these examples of insulation going into attics, walls and crawl spaces to get a feel for what the work involves.
Questions about retrofit insulation
These are the questions we hear when people start thinking about insulating an older house. If yours isn't here, call and ask about your own house.
How do I insulate existing walls without tearing them open?
Usually you don't have to open them, because most existing walls can be filled through small holes with a common method called drill and fill. Holes go in near the top of each wall cavity, from inside or outside, and the cavities are filled with blown-in insulation. If wall cavities do end up exposed during the work, Washington's energy code sets a minimum amount of insulation for those walls, based on how thick they are.
What attic problems need to be fixed before adding insulation?
Wet insulation, moldy or rotted rafters, vents blowing moist air into the attic and poor ventilation should all be fixed by a pro before new insulation goes in. Damp insulation can also mean the roof leaks, so a roof repair may need to come first. We look for each of these on the first visit.
What is the best way to deal with vermiculite insulation in my attic?
Leave it alone and plan for it before any attic work starts, because federal safety advice is to treat vermiculite as possibly containing asbestos and not disturb it. Moving it can put fibers in the air. In Washington, handling or removing asbestos in attic insulation takes a contractor with asbestos certification, and federal advice is that removal be done by a trained, accredited firm separate from whoever assessed it.
How do I check if an insulation contractor is licensed in Washington?
Search the company in the Verify a Contractor tool from the state Department of Labor and Industries, which lists registered contractors. Washington requires construction contractors to register there and to be bonded and insured, so a company that doesn't show up is a warning sign.
How much does retrofit insulation cost in Bellingham?
There isn't one price, because the cost comes from what your house needs, and we work it out once I've seen the attic, walls and crawl space. Repairs that have to come first, old insulation that has to come out, filling walls instead of topping up an attic, tight or hard-to-reach spaces and choosing foam over loose fill all push it up. Call (360) 255-0276 to set up a visit.
Can you add insulation to a house with knob and tube wiring?
Not around that wiring, because the electrical code bars insulation on or around knob and tube wiring. This wiring shows up in houses from before about 1930 and can be a fire hazard when insulation touches it, so it has to be dealt with before those spaces get insulated.
Where we do retrofit insulation
Before scheduling, we ask the office covering your address whether your job needs a permit, which in Bellingham means the city's permit center. We also work in Ferndale and Lynden, among others.
Call about retrofit insulation for your Bellingham house
We take calls evenings and weekends too, and our work is backed by our satisfaction guarantee.