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4.6

(447 reviews)

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Avatar for Insulation Northwest
Insulation Northwest
4.8(
101
)

Serving Bothell, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Warranties offered

"Insulation Northwest did a fantastic job insulating my 1944 house recently, with Drill & Fill in ground-floor walls never before insulated, plus a complete insulation of the second floor attics and interior walls. They were super-careful cutting and drilling my old cedar shakes, replacing them perfectly and caulking them afterwards. They worked around plants without damaging a thing while doing the walls outside. I have old lath and plaster walls but blowing in the fill left not even a hairline crack or any trace on the inside. Much appreciated! They spent two long days at my house and they were clean, friendly, professional, and helpful . This is my second time hiring Insulation Northwest and I give them my highest recommendation."
Additional Photos
Additional Photos
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26 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for SPF Insulation
SPF Insulation
4.8(
48
)

Serving Bothell, WA and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"The staff was friendly and professional. They demonstrated a desire to get to work asap which made the selection easy. Also got a spray foam insulation bid for crawl space and we will go with SPF for this large expense. Spay foam crawl supports our heated floors so that more heat will heat people opposed to rats in the crawl..."
Drill & Fill
Drill & fill
Drill & Fill
Drill & Fill
Drill & Fill Method

+1

Response time3 days
2 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Lake Atitlan Insulation, LLC
Lake Atitlan Insulation, LLC
5.0(
20
)

Serving Bothell, WA and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

"Lake Atitlan Insulation did an excellent job in my attic. They removed the old insulation, installed a solar attic vent, replaced the bathroom vent duct, and added new blown-in fiberglass insulation. They also installed radiant barrier on all the attic roof rafters. The work was completed professionally and thoroughly. I highly recommend them."
8 neighbors recently requested a quote
Recommended by5%of homeowners
Avatar for EvergreenPro Insulation LLC
EvergreenPro Insulation LLC
5.0(
19
)

Serving Bothell, WA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"I was given several recommendations from Angi list, the most professional one of the 4 contacts I received was from David of EVERGREENPRO INSULATION. I needed to have a couple of interior walls insulated for soundproofing done. David was responsive, answered all my questions and gave me a reasonable quote. The other companies I talked to quotes were inline with Davids but the customer service just wasn't there like Davids. I even had one company tell me my project was too small for them to do..... Really? The next insulation project I need done I will just call David from EVERGREENPRO INSULATION and give them the job. A great job done by David and Jamie and would recommend and use them again."
Before clean out
After clean out
After installation
After installation
Access door frame

+4

Response time1 day
Response rate96%
33 neighbors recently requested a quote
Avatar for Insulation Co., LLC - Removal & Clean Outs
Insulation Co., LLC - Removal & Clean Outs
4.9(
219
)

Serving Bothell, WA and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

"Insulation Co recently performed a crawlspace cleanout. Jo Estrada performed a bid for my home based upon on-line square footage and floor plans very quickly. His staff of 3 men arrived at about 7:30 AM and completed the crawlspace cleanout in about 7 hours. Several things that I learned during this process my 1998 built home: Had insulation with formaldehyde Had R-19 insulation - New installed insulation was R-30 The old insulation was no longer efficient after 20 years The new (R-30) insulation will be efficient for 30 years Insulation Co also does attic insulation replacement When they completed the crawlspace cleanout, the crawlspace looked better than it did when the home was new."
1
2
3
1
2

+46

Response time5 hrs
Recommended by50%of homeowners
Avatar for Madrona Insulation
Madrona Insulation
4.9(
68
)

Serving Bothell, WA and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

"It went very well from the estimate process. Rory took the time to explain the process. As I had questions, he took the time to talk to me and explain in detail. Deb coordinated the scheduling extremely well. Among the estimates I got they were the most reasonably priced. I started out only doing the attic. They did such a good job, I decided to go ahead and have the crawlspace insulated as well by Madrona Insulation. BTW, shout out to a terrific installation crew!"
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8 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for AT Foam
AT Foam
5.0(
5
)

Serving Bothell, WA and surrounding areas

Approved

In business since 2003

Free estimates

Warranties offered

"Unbelievable company such great work. John is one of the best business man I have ever dealt with he deserves 20 stars. And his crew does to if you ever need insulation go here. No place else. Best in the state 👍👍👍👍👍"
Roof deck closed cell spray foam
SPF roof deck
SPF ceiling and gable end wall
Flat ceiling 2lb closed cell
Flat ceiling roof deck

+21

Response time10 hrs
Response rate98%
2 neighbors recently requested a quote
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Insulation questions, answered by experts

To stay ahead of your home's insulation service needs, keep moisture detection equipment on hand. Bothell experiences high winter humidity, making vapor intrusion a common issue in attics and crawl spaces. You should also maintain vapor barrier inspection materials and ventilation monitoring tools. These supplies help you catch excess dampness early, preventing mold growth and ensuring your home meets strict WA energy standards.

Helpful?

Visible mold or mildew in your attic strongly indicates a failed previous insulation service. Inspect your crawl space for compressed, matted batt insulation or deteriorated vapor barriers, which result from elevated soil moisture in Bothell. Rodent activity and unaddressed water damage from historic roof leaks also require a complete replacement. Upgrading is necessary if your existing materials fall below modern WA energy standards.

Helpful?

Schedule insulation service after the long rainy season ends in late April or May. Watch for clear warning signs like condensation on your interior windows or standing water in your crawl space. A sudden spike in your heating bills also indicates failing materials. Since many Bothell homes built between 1960 and 1990 fall below current code standards, inspecting your space yearly prevents major energy loss.

Helpful?

Select moisture-resistant materials for any insulation service to combat the damp local climate. You must install a Class II vapor retarder on the warm side of your wall assemblies to control humidity. Full crawl space encapsulation systems protect lower elevations from standing water. Always verify your materials meet the strict WA energy requirements, which mandate specific R-values like R-49 for attics and R-20 for walls.

Helpful?

Start planning your insulation service four to six weeks in advance, and schedule the work between May and September to avoid heavy rain. You must hire a licensed contractor and secure the proper building permits, as Bothell falls under dual county jurisdictions. Check with your local utility provider beforehand to apply for available rebate programs when upgrading your home to meet current WA energy codes.

Helpful?

The Bothell, WA homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.