Basic
$1.23 – $3.29 per sq ft
1-1/2 in. white EPS foam board (around R-6), adhesive and fasteners, seams taped

Photo: Adrian Tync · CC BY-SA 4.0 · Source
Supply and install EPS or XPS polystyrene foam board insulation (1-2 in) on walls, foundation or under slab, with adhesive/fasteners and taped seams.
Polystyrene Insulation in Fargo, North Dakota typically costs $1.45 to $3.87 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Prices in Fargo are 3.0% lower than the national average for polystyrene insulation.
National average: $1.50 – $4 per sq ft
$1.23 – $3.29 per sq ft
1-1/2 in. white EPS foam board (around R-6), adhesive and fasteners, seams taped
$1.45 – $3.87 per sq ft
1-1/2 in. graphite EPS foam board (around R-7), adhesive and fasteners, seams taped
$1.81 – $4.84 per sq ft
1-1/2 in. higher-density graphite EPS (around R-7), adhesive and fasteners, seams taped, edges and penetrations sealed
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.64 – $1.73 | sq ft |
| Labor | labor | $0.52 – $1.37 | sq ft |
| Supplies & Other | supplies | $0.17 – $0.46 | sq ft |
| Equipment & Disposal | equipment | $0.12 – $0.31 | sq ft |
Expanded polystyrene insulation boards fixed to an exterior wall with dowels
Photo: Adrian Tync · CC BY-SA 4.0 · Source
Find a pro to do thisSamples of white and graphite-grey EPS foam insulation board
Photo: Energieeffiziente Dämmstoffe · CC0 · Source
Find a pro to do thisClose-up of the cut edge of graphite EPS foam insulation board
Photo: Cjp24 · CC BY-SA 4.0 · Source
Find a pro to do thisRigid polystyrene foam boards installed on a building exterior wall
Photo: Manforowicz · CC0 · Source
Find a pro to do thisConnect with local polystyrene insulation contractors in Fargo for personalized quotes based on your specific project.