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Foam Board Insulation cost in Washington

How Much Does Foam Board Insulation Cost in Washington, District of Columbia?

Supply and install rigid foam board (EPS/XPS/polyiso, ~1-2 in) on walls, basement or foundation, taped and fastened, materials and labor.

Foam Board Insulation in Washington, District of Columbia typically costs $1.57 to $3.92 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.

Foam Board Insulation in Washington, District of Columbia

$1.57 – $3.92

per sq ft

Prices in Washington are 5.0% higher than the national average for foam board insulation.

National average: $1.50 – $3.75 per sq ft

What you get at each price level

  • Basic

    $1.33 – $3.34 per sq ft

    1-1/2 in. XPS rigid foam board (about R-7.5), fastened to the wall, seams taped

  • Standard

    $1.57 – $3.92 per sq ft

    1-1/2 in. XPS rigid foam board (about R-7.5), adhesive and fasteners, staggered joints, seams taped

  • Premium

    $1.96 – $4.91 per sq ft

    1-1/2 in. XPS rigid foam board (about R-7.5), adhesive and fasteners, staggered joints, seams taped, edges and penetrations sealed with foam

Cost Breakdown in Washington

ComponentCategoryPrice RangeUnit
Materialsmaterial$0.69 – $1.77sq ft
Laborlabor$0.56 – $1.36sq ft
Supplies & Othersupplies$0.19 – $0.47sq ft
Equipment & Disposalequipment$0.13 – $0.32sq ft
Prices adjusted for Washington local market conditions.

Foam Board Insulation photo examples

  • Close-up of the cut edge of a grey expanded polystyrene foam board showing its fused beads.

    Cut edge of grey graphite EPS rigid foam insulation board showing bead structure

    Photo: Cjp24 · CC BY-SA 4.0 · Source

  • Rows of silver foil-faced rigid foam boards fastened to a sloped roof deck between wood battens.

    Foil-faced rigid foam board fastened over roof framing with wood battens

    Photo: ryochiji · CC BY 2.0 · Source

Cost Factors in Washington, District of Columbia

What Affects Pricing

  • Materials ($0.66-$1.69 per square foot)
  • Labor ($0.54-$1.31 per square foot)
  • Supplies & Other ($0.18-$0.45 per square foot)
  • Equipment & Disposal ($0.12-$0.30 per square foot)

Local Price Adjustments

Material costs5.0% above avg
Labor costs4.0% above avg

Frequently Asked Questions

References

Get Free Estimates in Washington

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More Cost Intelligence for Washington

Foam Board Insulation: national cost guideAll Washington cost guides

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