Fiberglass vs cellulose blown-in cost?

Fiberglass blown-in often $1.50–$2.50/sq ft; cellulose $2–$4. Cellulose can have better R-value per inch and sound dampening.

What is the R-value of blown-in insulation?

Fiberglass blown-in about R-2.2–R-2.7 per inch; cellulose about R-3.2–R-3.8 per inch. Depth determines total R-value.

How long does blown-in insulation last?

Blown-in fiberglass and cellulose can last 80+ years if kept dry. Moisture and compaction can reduce effectiveness.

Can blown-in insulation be added over existing?

Yes. Adding blown-in over existing insulation is common. Do not add a vapor barrier between layers; ensure proper ventilation.

How much does blown-in attic insulation cost?

Blown-in attic insulation typically $2–$4 per sq ft for R-38 to R-49. Material and installation included.

What is dense pack blown-in insulation?

Dense pack is blown-in installed at higher density for walls. Used in existing wall cavities; typically $3–$5 per sq ft.

Can I install blown-in insulation myself?

Attic blown-in can be DIY with a rental machine. Wall dense pack should be done by a pro for proper density and coverage.

How do I get the best blown-in insulation quote?

Get 2–3 quotes. Specify fiberglass vs cellulose, target R-value, and area. Ask if air sealing is included.

What is the cost to blow in insulation for 1000 sq ft?

1,000 sq ft attic often $2,000–$4,000 for R-38 to R-49. Cellulose tends to be on the higher end.

Does blown-in insulation settle?

Cellulose can settle 10–20% over time; installers often add extra to compensate. Fiberglass settles less.

Is blown-in insulation good for soundproofing?

Blown-in cellulose in walls or ceilings can help with sound. Dense pack in walls improves sound transmission loss.

How much does blown-in wall insulation cost?

Blown-in (dense pack) in existing walls typically $3–$5 per sq ft. Requires small holes; no need to remove drywall.

Is cellulose or fiberglass blown-in better?

Cellulose often has slightly better R-value per inch and can block air better. Fiberglass is non-combustible. Both are effective.

Does blown-in insulation need a vapor barrier?

In attics, usually no additional vapor barrier. In walls, climate and code determine need; consult a pro.

Blown-In Insulation Cost Calculator

Q: How much does blown-in insulation cost?

Blown-in insulation in the U.S. typically costs $1–$4 per sq ft: fiberglass $1.50–$2.50, cellulose $2–$4. Attic and wall applications vary.

Use this free blown-in insulation cost calculator to estimate cost by material (fiberglass, cellulose), R-value, and area. Most projects run $1–$4 per sq ft. Get a low, average, and high estimate below.

How much does blown-in insulation cost?

Blown-in insulation typically costs $1–$4 per sq ft: fiberglass $1.50–$2.50, cellulose $2–$4. Get 2–3 local quotes.

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These figures are based on national average material and labor costs adjusted for the options you selected. Actual pricing varies with your local market, site conditions, material availability and contractor workload. Always get two or three written quotes before committing to a project.

Average Blown-In Insulation Cost

National averages run $1–$4 per sq ft. Final cost depends on material and R-value.

Cost by material (per sq ft)

Typical ranges

Material	Estimated cost
Fiberglass	$1.50–$2.50
Cellulose	$2–$4

Cost factors

What drives the total

Factor	Impact
R-value (R-30 vs R-60)	Higher R adds 15–30%
Attic vs wall	Walls (dense pack) cost more

What Affects Blown-In Insulation Cost?

Material — Cellulose often costs more than fiberglass but can have better R-value per inch.
R-value — Higher R (e.g. R-49, R-60) increases material and depth.
Area — Larger areas may get a better per-sq-ft rate.
Location — Labor and material prices vary by region.

Data from contractor quotes

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Disclaimer: Estimates are for planning only. Actual costs depend on product and local rates. Get 2–3 written quotes.