5 Best Insulation Services in Houston (2026)

Independently ranked by our review of ratings, reviews and reputation · How we chose

By Brad Smith, Home Services Expert · ✓ Data verified August 2026 · 8 min read

Houston summers push attics past 140 degrees, and old or thin insulation is often the real reason an AC unit runs constantly without ever catching up. The insulation contractors on this page have logged over 1,220 Google reviews between them, and the top pick alone carries more than 600 of those, so review depth is a real differentiator here, not just a rating on paper.

Short answer: EZ Attic leads with a 4.8 rating across 620 reviews, the deepest track record on this page, covering attic insulation, removal, and air duct cleaning. All Attic Insulation and Koala Insulation of West Houston both hold 4.9, and First Defense Insulation posts a perfect 5.0 on 93 reviews. Most jobs here run from a few hundred dollars for a small attic top-up to several thousand for full spray foam.

Jump to a business

1. EZ Attic
2. USA Insulation of SE H…
3. All Attic Insulation
4. Koala Insulation of We…
5. First Defense Insulati…
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Houston insulation companies, side by side

#	Business	Rating	Reviews	Best for
1	EZ Attic	4.8 ★	620	Overall / deepest track record	View ›
2	USA Insulation of SE Houston	4.8 ★	216	Attic inspection and spray foam	View ›
3	All Attic Insulation	4.9 ★	185	Blown-in attic insulation	View ›
4	Koala Insulation of West Houston	4.9 ★	107	Spray foam and crawl space work	View ›
5	First Defense Insulation	5.0 ★	93	Complex or technical insulation jobs	View ›

5 Best Insulation Services in Houston (2026)

Five insulation crews worth calling

#1 Overall🕑 Open 6 days/wk

EZ Attic

4.8620 Google reviews

EZ Attic is a Houston insulation contractor offering attic insulation, insulation removal, blown-in fiberglass, air duct cleaning, and HVAC cleaning. The company positions itself around matching or beating competitor pricing and operates as a locally and family owned business.

What people praise

Crews praised for removing old insulation thoroughly before reinstalling
Named staff called out for clear communication and follow-up
Careful work around ventilation and light fixtures noted by reviewers
Before-and-after photos shared with customers

Worth knowing

A handful of lower-star reviews exist among the 620, though the overwhelming majority are five-star

Reputation scorecardrank in Houston

Rating4.8 / 5

Review volume620 · 97th

Confidencehigh

Recency4 weeks ago

Info completenesssite · phone · hours

Rating breakdown90% 5-star

✓ VerifiedSource: Google

Our take: The deepest review history of any insulation contractor on this page by a wide margin, and the rating holds up well across that volume.

Website Book now +1713-909-0390 Directions

4801 Woodway Dr #205W, Houston, TX 77056

#2🕑 Open 6 days/wk↩ Responds to reviews

USA Insulation of SE Houston

4.8216 Google reviews

USA Insulation of SE Houston is a Pasadena-based insulation contractor offering spray foam, injection foam, blown-in attic insulation, air sealing, and attic fan and ventilation work. The company positions itself around plain-language attic walkthroughs and written quotes before any work begins.

What people praise

Praised for thorough inspections explaining exactly what's needed
Named installers Andy, Janie, and Lee called out for care and communication
Noticeable comfort improvement reported after service
Free attic walkthrough offered before committing

Worth knowing

One detailed review describes overspray cleanup issues and a slow resolution on a spray foam job, worth asking about for that specific service
Has a minimum project size for some services

Reputation scorecardrank in Houston

Rating4.8 / 5

Review volume216 · 91st

Confidencehigh

Recency4 months ago

Info completenesssite · phone · hours

Rating breakdown93% 5-star

✓ VerifiedSource: Google

Our take: Strong reviews overall and a clear, low-pressure process, though it's worth confirming scope and expectations up front, especially for spray foam work.

Website +1409-316-9957 Directions

3321 Westside Dr Ste B102, Pasadena, TX 77504

#3🕑 Open 6 days/wk

All Attic Insulation

4.9185 Google reviews

All Attic Insulation is a Houston insulation contractor focused on attic insulation upgrades, radiant barriers, and blown-in coverage. Reviewers consistently describe working directly with the owner, Royal, on quotes and installation.

What people praise

Owner praised repeatedly for honest, no-upsell quotes
Crews described as fast, typically finishing in under two hours
Cleanup after the job cited across multiple reviews
Reasonable pricing noted consistently

Worth knowing

No dedicated website text was available beyond the Google listing

Reputation scorecardrank in Houston

Rating4.9 / 5

Review volume185 · 85th

Confidencemoderate

Recency5 months ago

Info completenesssite · phone · hours

Rating breakdown97% 5-star

✓ VerifiedSource: Google

Our take: A near-perfect rating with consistent praise for straightforward pricing and quick, clean installs. A strong pick for a standard attic top-up.

Website +1713-817-1769 Directions

20333 TX-249 Suite 200, Houston, TX 77070

#4🕑 Open 5 days/wk↩ Responds to reviews

Koala Insulation of West Houston

4.9107 Google reviews

Koala Insulation of West Houston covers spray foam insulation, blown-in attic insulation, batt insulation, crawl space encapsulation, air sealing, and commercial insulation services. It's part of a national franchise brand with a local West Houston office.

What people praise

Same-day scheduling praised through partner referral programs
Detailed insulation upgrades documented with before-and-after depth measurements
Rodent and insect repellent used before starting jobs, noted by reviewers
Energy efficiency tax credit eligibility mentioned as a customer benefit

Worth knowing

Two detailed negative reviews describe incomplete work and communication gaps on larger jobs, worth discussing scope clearly up front

Reputation scorecardrank in Houston

Rating4.9 / 5

Review volume107 · 79th

Confidencemoderate

Recency3 months ago

Info completenesssite · phone · hours

Rating breakdown96% 5-star

✓ VerifiedSource: Google

Our take: A high rating overall, though the negative reviews here are more detailed than on other pages, so a clear written scope of work before the job starts is worth insisting on.

Website +1713-493-2063 Directions

1029 Hwy 6 Ste 650 #260, Houston, TX 77079

#5🕑 Open 5 days/wk↩ Responds to reviews

First Defense Insulation

5.093 Google reviews

First Defense Insulation is a Houston attic and spray foam insulation contractor also offering cellulose insulation, radiant barriers, air sealing, crawl space insulation, and ductwork repair and sealing. It serves Houston along with Spring, Katy, and The Woodlands.

What people praise

Perfect rating across every review on file
Praised for handling technically difficult jobs, including vaulted roofs and century-old pier-and-beam homes
Named staff, including a co-founder, cited for hands-on project management
Patient scheduling around moisture conditions to avoid unnecessary cost, per one detailed review

Worth knowing

Smallest review count on this page, though the rating is flawless

Reputation scorecardrank in Houston

Rating5 / 5

Review volume93 · 68th

Confidencemoderate

Recency5 months ago

Info completenesssite · phone · hours

Rating breakdown100% 5-star

✓ VerifiedSource: Google

Our take: The perfect rating and the depth of the technical reviews stand out. Worth the call for a complex job other contractors have struggled to solve.

Website +1713-808-9853 Directions

12 Greenway Plz Ste 1147, Houston, TX 77046

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How we score these insulation companies

Rating is each company’s live Google average. Review volume measures how many customers actually left a rating, ranked against the others on this page. Confidence weighs the rating against that volume, so a perfect score on 93 reviews scores differently than a high score on 620. Recency checks how recently people are still leaving reviews. No insulation contractor can pay to change these numbers.

How much does insulation cost in Houston? (2026)

Pricing depends heavily on insulation type and attic size. USA Insulation of SE Houston lists a minimum project threshold, and reviewers across these companies mention costs ranging from a few hundred dollars for a small top-up to several thousand for a full spray foam job.

Job	Typical price
Minimum project size (USA Insulation)	800 sq ft or $2,300
Attic fan promotion value (USA Insulation)	up to $1,500

Figures compiled August 2026 from these contractors’ own website pricing pages and promotions.

Serving all of Greater Houston

These companies cover the Houston metro from Woodway Dr and West Houston out to Pasadena, Spring, Katy, and The Woodlands. If you’re searching for insulation services near me in Houston, all of them run crews across the wider metro rather than sticking to one neighborhood.

What to ask before you hire an insulation company

What type of insulation do you recommend for my attic, and why?
What R-value or depth will the finished job reach?
Is there a minimum project size or cost?
Do you offer a free inspection or estimate before I commit?
Will you protect flooring, light fixtures, and vents during the job?
What’s your warranty, and how do you handle a callback if something’s off?

Frequently asked questions

Are these rankings paid?

No. Rankings come from public Google data. A business can pay to be a Featured Partner (badge and top placement), but that never changes another business’s score or position.

How did you choose these insulation services?

We pulled real Google ratings and review counts for insulation contractors across Houston and ranked the strongest combination of rating, review volume, and recent activity. Every fact in this list is sourced from Google listings, reviews, or the companies’ own websites.

How often is this list updated?

Ratings and review counts were verified in August 2026 and are refreshed periodically as new reviews come in.

How do I know if my attic needs more insulation?

Signs include an AC that runs constantly without cooling evenly, hot upstairs rooms, and high summer energy bills. Several contractors on this page offer a free inspection to measure existing coverage before quoting.

What’s the difference between blown-in and spray foam insulation?

Blown-in insulation is loose material distributed across the attic floor, while spray foam expands and hardens to seal gaps and stud cavities. Several companies here offer both and can recommend which fits a specific attic and budget.

The bottom line

EZ Attic is the safest default: the deepest review history on this page and a solid 4.8 rating across it. For a technically tricky attic or crawl space, First Defense Insulation’s perfect rating and hands-on approach make it worth the extra conversation.

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