Blown-in insulation costs $0.90 to $2.00 per square foot installed, with a typical 1,000 sq ft attic costing $900 to $2,000. Material choices—cellulose or fiberglass—affect price, and adding R-value increases cost. Most homeowners recoup the expense through energy savings within 2 to 5 years.
| Item | Typical range |
|---|---|
| Average Cost (1,000 sq ft) | $900 - $2,000 |
| Per Square Foot Installed | $0.90 - $2.00 |
| Cellulose vs Fiberglass | $1.00 - $1.50 per sq ft |
| R-Value Upgrade | $200 - $400 |
Per Square Foot Pricing
Installed cost ranges from $0.90 to $2.00 per sq ft, with materials alone costing $0.30 to $0.60 per sq ft.
Factors That Influence Total Cost
Depth of insulation needed, access difficulty, and existing insulation removal can add $200 to $600 to the project.
Comparing DIY vs Professional Installation
DIY blown-in machine rental costs $50 to $100 per day plus material; professional labor adds $300 to $600.
What moves the price in Charleston, South Carolina
Attic size and insulation R-value affect cost. Local quotes reflect the items below, so two providers can quote different totals for the same described job without either being wrong.
- Local labour rates and licensing requirements for the trade or professional involved
- Permits, inspections and disposal fees set by the local authority
- Travel and call-out charges for the distance from the nearest provider
- Season and demand peaks, which move both the price and the wait
- Materials, parts or inputs, and how their grade or availability changes the total
- Whether the work is a repair, a partial job or a full replacement
How to compare blown-in insulation quotes in Charleston, South Carolina
Write the scope down first, then send the same description to at least three local providers. Compare the quotes line by line against that scope rather than by the headline total.
- Agree the scope: exactly what is being repaired, replaced or supplied, and how far the work extends.
- List the inclusions: labour, materials, permits, inspection fees, disposal and clean-up, each stated separately.
- Ask what is excluded, and what would trigger an extra charge once the work starts.
- Check timing: how soon work can start, how long it takes, and whether out-of-hours rates apply.
- Confirm terms: deposit, payment schedule, warranty on parts and labour, and how changes are priced.
A lower total that leaves out permits, disposal or a necessary second stage is not cheaper once those items are added back. Ask each provider in writing what would change the price.
This page does not quote work and is not a contractor. The range above is an estimate, not an offer.
Common questions
What moves the price of blown-in insulation in Charleston, South Carolina?
Is the range on this page a quote?
How should I compare blown-in insulation quotes in Charleston, South Carolina?
Can blown-in insulation costs be financed?
Affiliate disclosure: some links on this page are affiliate links. If you follow one we may be paid. That never changes the estimate or the guidance we show.
Blown-In Insulation Financing
Compare personal loan options for blown-in insulation from lenders before you commit. We do not set rates or make credit decisions.
Compare personal loan optionsThe lowest rates are only available to the most qualified applicants
We are not a lender. We do not make loans, set rates, or make credit decisions. This is an affiliate link and we may be paid if you follow it.