Spray Foam Insulation Contractors in Washington
Climate Zone
Average Cost
$1.50 - $3.50 per sq ft
Building Code Info
Cities in Washington
Top Contractors in Washington
Precision Spray Foam Insulation Seattle
Washington, Washington
Precision Spray Foam Insulation Seattle serves the greater Seattle area with both closed-cell and op...
Residential · Commercial · Agricultural
Get a Free QuotePrime Spray Foam Insulation Lakewood
Washington, Washington
This locally owned Lakewood contractor brings over two decades of combined experience delivering spr...
Residential · Commercial · Agricultural
Get a Free QuoteSpokane Spray Foam Insulation
Spokane, Washington
Spokane Spray Foam Insulation installs both closed-cell and open-cell foam for residential, commerci...
Residential · Commercial · Agricultural
Get a Free QuoteHOC Spray Foam Insulation
Spokane, Washington
HOC Spray Foam Insulation serves Spokane and surrounding areas with expert insulation solutions for...
Residential · Commercial · Agricultural
Get a Free QuotePacific Insulation & Mold Remediation
Spokane, Washington
Pacific Insulation & Mold Remediation serves Spokane and surrounding Washington communities with R-S...
Climate Zone
4-5
Average Cost
$3.00-$6.50/sq ft
R-Value (Attic)
R-49
R-Value (Walls)
R-20
Climate: mild and rainy
Washington's rainy climate makes moisture control critical. Spray foam's dual role as insulation and vapor barrier is especially valuable in the Pacific Northwest.
Why Spray Foam Insulation in Washington?
Washington's rainy climate makes moisture control critical. Spray foam's dual role as insulation and vapor barrier is especially valuable in the Pacific Northwest. With a mild and rainy climate, proper insulation is essential for maintaining comfortable indoor temperatures year-round.
In Washington's mild and rainy conditions, spray foam provides superior performance compared to traditional insulation materials. This can lead to substantial savings on heating and cooling costs throughout the year.
With average costs ranging from $3.00-$6.50 per square foot, spray foam insulation is a smart investment for Washington homeowners.
Building Code Requirements in Washington
Attic Insulation
R-49
Wall Insulation
R-20
Climate Zone
4-5
These are minimum requirements. Higher R-values provide better performance and energy savings.
Popular Cities in Washington
Frequently Asked Questions
How much does spray foam insulation cost in this state?
Spray foam insulation typically costs $1.50-$3.50 per square foot, depending on the type (open-cell vs closed-cell) and project scope.
What R-value is required for insulation?
Current building codes require R-49 for attics and R-20 for walls in Climate Zone 4-5.
Should I choose open-cell or closed-cell spray foam?
In a mild and rainy climate, both types work well — open-cell for interior walls and closed-cell for exterior or moisture-prone areas.