Insulation Contractor Houston

Looking for an insulation contractor in Houston? Insulation Contractor Houston insulates attics, walls and commercial buildings with blown-in fiberglass, spray foam and injection foam, and handles insulation removal, air sealing and attic fans. Book a free attic walkthrough and get a written quote. Call (832) 291-2738 or visit insulationcontractorhouston.com.

We upgrade attics with blown-in fiberglass insulation, and we remove and replace worn insulation. We install open-cell and closed-cell spray foam, and we insulate existing walls with injection foam without removing drywall. We seal air leaks, and we install solar attic fans and attic ventilation fans. We also insulate commercial buildings.

Attic Insulation in Houston: What It Costs and What It Won't Fix

One north Houston home we worked on had its air conditioner running all day. The attic held less than 6 inches of insulation, with air leaks and gaps on top of that. Our crew pulled the old material out and blew in about 13 to 17 inches of fiberglass.

That's a common story with attic insulation in Houston. If your attic has little or none, the target is R-49, about 17 to 22 inches of blown-in fiberglass, and the work runs $1.00 to $2.50 per square foot.

How deep is deep enough?

Divide the target R-value by the R-value per inch. Blown-in fiberglass gives about 2.2 to 2.9 per inch, so R-49 works out to 17 to 22 inches. If you already have 3 to 4 inches down, the target is R-38, which is about 13 to 17 inches in total, or 9 to 14 inches to add.

R-49 is also what the 2021 energy code asks for at the ceiling of new City of Houston homes. We use it as the benchmark for older ones.

Houston is hard on attics. The city averages about 111 days a year at 90°F or higher, roof surfaces can pass 150°F, and attics can top 130°F in summer. Thin insulation lets that heat reach your rooms.

Yours is probably thin if upstairs rooms run hotter than downstairs, the AC keeps going long after sunset, your electric bill keeps climbing, you can see the ceiling joists, or the hatch smells dusty or musty. Builders put up many homes around 77080, where our office sits, in the 1950s and 1960s, so old, flattened or shifted insulation is common there.

What attic insulation in Houston costs

These are general Houston market ranges as of November 2026. They're not quotes.

Work
RateOn 1,500 sq ft
Blown-in fiberglass
$1.00 to $2.50 per sq ft
$1,500 to $3,750
Spray foam
$2.00 to $4.50 per sq ft
$3,000 to $6,750
Injection foam (walls)
$2.00 to $4.20 per sq ft of wall
$3,000 to $6,300
Insulation removal
$1.00 to $1.50 per sq ft
$1,500 to $2,250
Replacement
 $2.00 to $4.00 per sq ft
$3,000 to $6,000

Air sealing runs $250 to $740 per attic. In our [cost calculator](https://insulationcontractorhouston.com/insulation-cost-calculator), a thin attic topped off with blown-in fiberglass, air sealing and one attic fan comes to $2,049 to $5,208.

The rates cover materials and labor. They leave out drywall repair for injection foam and any AC system changes. Access, existing insulation and hidden damage can all move the final number. That's why we look at your attic first and put the quote in writing afterward.

Blown-in or spray foam?

Blown-in fiberglass costs the least and sits on the attic floor. It doesn't seal air leaks. Spray foam costs more, seals air, and can go on the roof deck or walls, and closed-cell foam also resists moisture. Per inch, open-cell foam gives about 3.5 to 3.9 and closed-cell about 6 to 7.

For a plain attic floor with room to build depth, we seal the leaks and blow in fiberglass. Spray foam earns its price when the roof deck or the walls are what you want insulated.

When you compare quotes, line them up by R-value, not square footage. A square foot of R-19 and a square foot of R-49 are different products at different prices.

Seal the leaks first

We seal air leaks before we blow anything in, because insulation laid over open gaps loses much of its value. The usual culprits are recessed can lights, gaps around wires and pipes, the attic hatch or pull-down stairs, duct boots, bath fan housings and the tops of interior walls. Skip them and the new insulation underperforms.

What insulation won't do

The ENERGY STAR estimate we work from says air sealing plus insulation saves about 6% of a total energy bill, or 9% of heating and cooling. On a $200 monthly bill, that's about $12. Some contractors advertise 30% to 50%, which is far above what that estimate supports.

For most Houston homeowners the gain is comfort first and money second.

It won't dry the air by itself, either. Houston gets about 52 inches of rain a year, so humidity problems need sealed air leaks, clear vents and a roof that doesn't leak. And insulation can't keep the power on during an outage.

When the old insulation has to go

Most attics don't need removal. If the insulation is clean and dry, we can top it off with blown-in material up to R-38 or R-49. Our [removal page](https://insulationcontractorhouston.com/insulation-removal) lists the cases where it has to come out:

• Rodent droppings, urine or nesting material, because topping off traps the contamination
• Moisture or mold, which has to go before anyone repairs the source
• Fire or smoke damage, since insulation absorbs smoke odors
• Vermiculite installed before 1985, which may contain asbestos and needs a certified contractor Compression so bad that R-value drops below R-11 and we can't air seal through the layer

Most residential removals finish in one day. With air sealing and reinstallation, plan on one to two.

How a job runs

We start with a free walkthrough. We measure depth in several spots and check for moisture, air leaks, vents and pests. You get an itemized written quote before we schedule anything.

On install day we confirm the arrival window and protect your floors and the attic hatch. When we finish, we clean up and walk the job against the quote with you. Afterward, you can call us with questions. No pressure at any step.

Insulation Contractor Houston was founded in 2019 and has a team of 15. We're open Monday to Saturday from 8am to 6pm and closed Sunday. We cover Houston, Cypress, Spring, Conroe, Kingwood, The Woodlands, Humble and Tomball.

Quick questions

Is DIY blown-in cheaper?

It costs less up front, but missed air leaks or baffles cut its value. Attics can pass 130°F in summer, and the job takes a day or more.

Do I need to leave during installation?

For blown-in work you can stay, though leaving is better. For spray foam, stay out until the re-entry time passes, which is at least 24 hours.

Measure your attic this weekend

Push a ruler into the insulation in several spots and write down the depth. Six inches of blown-in fiberglass is only about R-13 to R-17, a third of the way to R-49.

Then call (832) 291-2738 to book a free attic walkthrough and get a written quote, or run the numbers first in the calculator at insulationcontractorhouston.com.