Is $5,000 to install spray foam insulation to r-49 specification a fair price?
Project Details
I am putting a 600sf addition on my 1954 cottage. The architect spec'd pre-manufactured trusses, but the limited cavity space means I need to meet R-49 code requirements. My builder estimates that switching to stick framing to allow for cheaper insulation would cost an additional $5,000 in lumber and drawings.
Quote Details
Spray foam insulation for a 600 sqft addition to meet Maryland R-49 energy code requirements. - High-performance spray foam application - Designed for limited cavity space in engineered trusses - Approximately $5,000 premium over standard batt insulation
You say...
Vote Distribution
These ratings are not endorsed by Quote Critic. They are submitted by other Quote Critic users like you.
More Details
Category
Insulation
Price
$5,000
Quote Date
June 12, 2026
Location
Maryland
Home Size
600 sq ft
Year Built
1954
Insulation Type
Spray foam
R Value
49
Comments
No comments yet
Sign in to share your thoughts and ask questions.
Similar Quotes
Install spray foam insulation in ceiling of room extension
This quote is for installing spray foam insulation in the ceiling of a 228 sq ft room extension. - Scope: Ceiling insulation only - Area: 228 sq ft room extension - Existing insulation: Floor and walls are already insulated
Spray foam insulation for crawl space, dormers, and attic
This quote outlines a comprehensive spray foam insulation project for the crawl space, dormers, and attic of my 1960s block/stucco house. The work includes: - Crawl Space/Partial Basement (1125 sqft): - Removal of existing low R-value insulation (mix of white/pink, non-backed). - Sealing the entire basement with 3 inches of closed-cell R20 spray foam to isolate it. - Dormers: - Removal of existing pink backed R19 insulation from roof joists. - Spray foaming the roof and headers with 8 inches of open-cell R30 insulation. - Cutting access holes in inaccessible dormer areas. - Attic: - Removal of existing R19 backed pink insulation covering two upstairs rooms. - Sealing attic vents. - Spray foaming the roof with 8 inches of open-cell R30 insulation. - General: Removal of all old insulation is included.
Spray 4" closed cell foam on roofline
This option involves spraying 4 inches of closed cell foam on the roofline to achieve an R30 insulation value. - Insulation Type: Closed cell foam - Application: Roofline - Thickness: 4 inches - R-Value Achieved: R30 - Ventilation: Soffit vents and roof caps will be blocked off