SmartInsulationCalculator

2026 cost data

Insulation Cost in Hawaii (2026)

Insulation in Hawaii costs well above the national average — ranked 51 of 51 for installed price. Hawaii sits in climate zone 1, so attics should hit R-30.

Insulation prices per square foot

Installed prices — material plus labor — adjusted for Hawaii labor rates.

Job typeInstalled cost / sq ft1,500 sq ft attic
Attic blown-in fiberglass (R-49)$2.74$4,107
Attic blown-in cellulose (R-49)$2.52$3,774
Attic fiberglass batts (R-38)$2.37$3,552
Wall batts, open framing (R-15)$2.59$3,885
Wall dense-pack retrofit (drill & fill)$3.85$5,772
Crawlspace floor or wall insulation$3.11$4,662
Basement rigid foam + framing$4.59$6,882
Open-cell spray foam (3.5")$2.89$4,329
Closed-cell spray foam (2")$5.33$7,992
Old insulation removal & disposal$2.29$3,441

What whole jobs cost

Typical projectLocal price range
Attic top-up (1,500 sq ft)$2,220 – $3,848
Full attic removal + re-insulate$4,736 – $7,992
Whole-house wall retrofit (2,000 sq ft home)$6,216 – $11,544
Crawlspace encapsulation + insulation$5,624 – $13,320
Garage conversion insulation$1,332 – $3,256
Whole-home spray foam (new build)$11,100 – $23,680

Climate zone 1 R-value targets

Department of Energy retrofit recommendations for this zone.

Attic
R-30
Walls
R-13
Floors
R-13
Check your current R-value →

Price your own job

These tables are averages. Punch in your real measurements for a number you can compare against a bid.

Insulation costAtticBlown-in bagsProject total

Cities in Hawaii

Honolulu

Insulation cost FAQs for Hawaii

How much does attic insulation cost in Hawaii?

A 1,500 sq ft attic blown to R-49 runs about $3,491 to $4,928 installed in Hawaii, or roughly $2.74 per square foot. DIY with rented equipment cuts that by 45–60%.

Is insulation cheaper to DIY in Hawaii?

Yes. Labor is most of an insulation bid, so blowing your own attic or installing batts typically saves 45–60% of the installed price. Spray foam, dense-pack wall retrofits and removal jobs are worth hiring out.

What drives insulation prices in Hawaii?

Local labor rates, how far crews travel, attic access, whether old insulation has to be removed first, and the R-value your climate zone calls for. Material prices barely change between states — labor is the swing factor.

Are there rebates in Hawaii?

The federal 25C tax credit covers 30% of insulation and air-sealing material costs up to $1,200 per year, and most utilities add their own attic and air-sealing rebates. Always check with your utility before booking work.

Materials for an insulation job in Hawaii

Fiberglass Insulation Rolls R13Browse current prices and top-rated options on Amazon

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