Serving Nationwide, all 50 statesAttic Insulation Help connects you with licensed local companies. We are not a contractor and do not perform the work ourselves.
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About Attic Insulation Help

What Attic Insulation Help is, how it earns its money from referrals, and why every cost and R-value figure on this site names a source and a date.

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About Attic Insulation Help
What is Attic Insulation Help?

Attic Insulation Help is a reference and referral site for attic insulation across the United States. We explain what blown-in insulation costs, how deep it needs to go for your climate zone, and how it compares to batt and spray foam - then we connect you with a licensed local company. Attic Insulation Help connects you with licensed local companies. We are not a contractor and do not perform the work ourselves.

How does this site make money?

When we match you with a local company, that company pays us a referral fee. You pay us nothing, and the fee does not change the quote you are given.

Saying so plainly explains our bias, and we would rather you knew it: we earn when you get matched, not on how large the job turns out to be - which is why nothing here pushes you toward the more expensive material or the bigger scope.

Where do the numbers on this site come from?

Every cost figure, R-value target and savings estimate on this site is cited to a named, dated source - HomeAdvisor for pricing, the Department of Energy and ENERGY STAR for R-values and technique, the EPA for savings estimates, and the FTC for the rules that govern how insulation contractors have to disclose R-value. Where we have not sourced a figure, the page says what the number depends on instead of guessing at one.

Where do the numbers on this site come from?
How it works

How blown-in insulation is actually installed

Four steps, done in order. The Department of Energy is explicit that skipping the air-sealing step is the most common way a new insulation job still leaves an attic underperforming.

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  1. 1

    Air seal first

    The EPA recommends sealing attic-floor penetrations before insulating, because loose-fill does not stop air moving through gaps around wiring, pipes and fixtures.

  2. 2

    Add baffles and depth markers

    Rafter baffles keep blown material off the eaves where it could get wet, and depth rulers mark the target R-value before the blower starts.

  3. 3

    Blow to depth

    A pneumatic machine feeds loose fiberglass or cellulose over the attic floor, covering the tops of the joists so heat cannot bypass the insulation.

  4. 4

    Verify and clean up

    The settled depth gets checked against the target R-value for your climate zone, then tools and debris are cleared.

How we work

What this site will and will not do

We explain the R-value target and the real cost drivers first, and we do not sell you the installation - which is why we can say plainly when topping up beats a full replacement.

01

R-value before a quote

ENERGY STAR recommends R-30 to R-60 depending on your climate zone. Knowing your target before you call means you can hold every bid to the same number.

02

Air sealing first, always

The Department of Energy is explicit that insulation slows heat flow but does not stop air leaks - sealing gaps first is what makes the insulation you pay for actually perform.

03

We are not the installer

We do not install anything ourselves, so we have nothing to gain from steering you toward the bigger job. Licensed local companies do the work and quote it themselves.

04

Nothing we cannot source

Every figure on this site traces to a named, dated source - HomeAdvisor, the DOE, ENERGY STAR, the EPA or the FTC. Where we have not sourced a number, we say so instead of guessing.

Where it goes

Attic floor, walls, and everything between

An open attic floor ready for blown-in insulation
Attic floor

The most common job

Open, accessible attic floors are the most DIY-friendly space, and where most homes gain the most for the least cost - ENERGY STAR calls the attic often the single largest opportunity to save.

A technician operating an insulation blower machine
Walls & tight spaces

Usually a pro job

Finished wall cavities, rooflines and rim joists need pneumatic equipment or spray foam and real know-how - the Department of Energy calls blown-in the most economical way to fill a closed wall cavity.

Where it matters

The areas that decide your R-value

Most of a home’s insulation job comes down to a short list of spaces - what each one needs differs by access and how it is built.

Attic floor - what it needs
Attic floor
Exterior walls - what it needs
Exterior walls
Rooflines & rafters - what it needs
Rooflines & rafters
Rim joists - what it needs
Rim joists
Crawl spaces - what it needs
Crawl spaces
Recessed lighting - what it needs
Recessed lighting
Questions

Frequently asked

The questions people actually type before calling a company.

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How much does attic insulation cost?

Most homeowners pay about $1,700 to $2,500 installed, roughly $1 to $3 per square foot, with a national average near $2,100 (HomeAdvisor, 2026). Blown-in fiberglass is the least expensive material; spray foam runs highest. Our cost page breaks pricing out by material and by job size.

What R-value should my attic be?

ENERGY STAR recommends R-30 in the warmest US climate zone up to R-60 in the coldest, based on the 2021 IECC. If you already have three to four inches of insulation, the target for topping up drops to roughly R-25 to R-49 depending on your zone.

Should I air seal before adding insulation?

Yes. The Department of Energy is explicit that insulation slows heat flow but does not stop air leaks, so sealing gaps around wiring, plumbing and light fixtures first is what lets new insulation perform at its rated value instead of losing heat around it.

Can I install blown-in insulation myself?

Often, yes, on an open and accessible attic floor - home-improvement stores commonly rent the pneumatic blower for about $100 to $200 a day. Hire a professional for finished walls, rooflines, insulation removal, or any sign of moisture, mold or older wiring.

How do I choose an attic insulation company?

Confirm the company is licensed in your state, insured, and employs trained or certified installers, and get written estimates from more than one. Compare bids on the installed R-value they promise, not price alone, and confirm air sealing is included. We match you with licensed local companies - we do not install anything ourselves.

Get matched with a licensed local insulation company

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