What does attic insulation cost in Philadelphia?
Without a verified utility rebate or a federal credit for 2026 work, budget from national prices, and expect higher numbers where the roof is too shallow for blown-in.12
National cost by type
| Type | Per sq ft | Typical installed |
|---|---|---|
| Blown-in | $0.90–$2.40 | $900–$3,600 |
| Batts and rolls | $0.80–$2.60 | $1,100–$3,900 |
| Spray foam, attic floor | — | $1,100–$6,800 |
| Spray foam, rafters/roof deck | — | $1,500–$9,000 |
Source: HomeGuide (national).2
Blown-in by R-value
| R-value | Min. thickness | National cost per 1,000 sq ft |
|---|---|---|
| R-38 | 13.0 in | $840–$1,500 |
| R-49 | 16.5 in | $1,100–$1,900 |
| R-60 | 20.0 in | $1,400–$2,400 |
Source: HomeGuide (national, blown-in).3
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- Air sealing: $350 to $3,000 nationally.2
- Removing old insulation: $1 to $2 per sq ft.2
- Soffit baffles: $2 to $3 each.2
- Minimum job charges of $1,500 to $2,000 at some companies.3
Common questions
How much does attic insulation cost in Philadelphia?
No local survey exists. HomeGuide's national average range is $1,000 to $2,700.
What does roof-deck spray foam cost?
HomeGuide's national range is $1,500 to $9,000.
What does R-60 blown-in cost on 1,000 square feet?
$1,400 to $2,400 nationally, per HomeGuide.
Is there still a federal tax credit for insulation?
No. The IRS says the Energy Efficient Home Improvement Credit covers improvements made through December 31, 2025.
General information summarized from the public sources listed below. It isn't professional, engineering or legal advice. Codes and programs change; confirm current requirements with your local building department or utility before you start.