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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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.