Insulation Calculator
Wall cavities, batt or blown-in bags, ceiling coverage and air sealing.
Insulation Calculator results
Estimated materials $473. Estimate only.
Enter your ZIP to re-price materials, or keep national averages.
Shopping list
| Item | Qty | Unit | Total |
|---|---|---|---|
| R-13 fiberglass batts (bag) | 4 | $62/bag | $248 |
| R-38 blown cellulose (bag @ 12") | 5 | $21/bag | $105 |
| 6 mil vapor barrier (10' × 100') | 1 | $48/roll | $48 |
| Low-expansion window & door foam | 3 | $10/can | $29 |
| Acoustical / air-seal caulk | 2 | $7/tube | $13 |
| Staples (T50, 5,000 ct) | 1 | $8/box | $8 |
| Attic vent baffles (10 pk) | 1 | $22/pack | $22 |
| Includes 10% waste allowance ($0) | $473 | ||
Build summary
- Gross wall area
- 416 sq ft
- Openings removed
- 51 sq ft
- Ceiling area
- 168 sq ft
- Stud cavities
- 39
- Vapor barrier rolls
- 1
- Foam cans
- 3
- Waste allowance
- $0
Cut list & field notes
Wall batts — 39 @ 15" wide × 8 ft
Cut batts 1/2" long and friction-fit — never compress them, compression kills R-value.
Ceiling / attic — 1 @ 168 sq ft
Keep insulation off can lights unless they're IC-rated, and keep soffit vents clear with baffles.
Closing the walls up next?
The drywall calculator prices sheets, mud, tape and screws.
Open drywall calculatorInsulation takeoffs for remodelers
Price a whole-house or single-room insulation package in a minute: net wall area after openings, bag counts by R-value, ceiling coverage, air sealing supplies, and a branded proposal for the homeowner the same visit.
- Takeoff priced to your ZIP in minutes
- Cut list that trims the lumber order
- Branded proposal and invoice PDFs
Material and cost output is an estimate, never a quote. Permit content is guidance to verify with your local building department.