XPS insulation board typically costs $15-$65 per 4-by-8-foot sheet, with a common 1-inch board averaging about $25-$35. Installed project prices often run $1.25-$3.50 per square foot, depending on thickness, labor, site preparation, and whether existing insulation must be removed.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| 4-by-8-foot XPS sheet | $15 | $30 | $65 | Price varies with thickness and facing |
| Material per square foot | $0.47 | $0.94 | $2.03 | Based on a 32-square-foot sheet |
| Professional installation | $1.25 | $2.25 | $3.50 | Per sq ft, excluding major removal or repairs |
| DIY materials for 500 sq ft | $300 | $550 | $1,050 | Includes boards and typical fastening supplies |
What XPS Board Costs for Walls, Floors, and Foundations
For a straightforward project, buyers generally pay $0.50-$2.05 per square foot for XPS board alone and about $1.25-$3.50 per square foot for installed insulation. A 500-square-foot wall or basement project therefore may total roughly $625-$1,750 before substantial demolition, moisture repairs, or finish work.
Thickness and product rating explain much of the price spread. A typical 1-inch, 4-by-8-foot sheet costs around $20-$35; 2-inch sheets commonly cost $35-$60. Retailer, region, quantity, and whether the board has a specialty facing also affect the quote. Assumptions: standard 4-by-8-foot boards, ordinary access, and no major substrate repairs.
For a basic 500-square-foot installation, a working budget of $1,100-$1,300 is a useful starting point.
How Board, Labor, and Fasteners Shape the Quote
Contractors may quote materials and installation together or list each charge separately. Comparing the line items helps show whether a low estimate excludes fastening supplies, edge sealing, delivery, or disposal.
| Quote item | Typical price | Pricing basis | What changes it |
|---|---|---|---|
| XPS boards | $0.47-$2.03 | Per sq ft | Thickness, rating, quantity |
| Installation labor | $0.65-$1.75 | Per sq ft | Cutting, layout, access |
| Fasteners and compatible adhesive | $0.10-$0.40 | Per sq ft | Wall type and fastening method |
| Delivery and handling | $50-$200 | Per project | Distance and order size |
| Removal and disposal | $0.25-$1.00 | Per sq ft | Old insulation and debris volume |
Labor can be estimated as . Insulation crews commonly charge $50-$100 per worker-hour, although many price the job by area rather than by time. A quote should identify the board thickness and whether sealing, removal, and delivery are included.
Why 1-Inch and 2-Inch XPS Sheets Cost Different Amounts
Thickness is a major price driver, but the project specification matters too. A 1-inch XPS board generally provides about R-5 insulation, while a 2-inch board is near R-10; actual labeled values depend on the product. A 2-inch sheet can cost roughly 50%-100% more than a 1-inch sheet, so doubling thickness does not always mean exactly double the total installed price.
Project size affects waste and labor efficiency. Small jobs under 100 square feet may carry a $150-$400 minimum labor charge, while projects above 500 square feet often receive a lower per-square-foot rate. Cutting around pipes, corners, or uneven foundation walls can increase labor by 10%-25%. Confirm the required R-value and local code before paying for a thicker board.
Where Homeowners Can Trim XPS Installation Charges
Accurate measurements reduce offcuts and help avoid ordering too many sheets. A 4-by-8-foot board covers 32 square feet before accounting for cuts; adding about 5%-10% for waste is typical for simple layouts, with more needed around many openings or corners.
Buy standard sizes and thicknesses when they meet the project specification, and compare delivered prices rather than shelf prices alone. Preparing a clear, accessible work area can reduce crew time, but substrate repairs and moisture problems should not be covered up to save labor. Keeping the scope consistent across written quotes is the simplest way to compare real prices.
How Installation Access Changes Labor Hours and Rates
Open, unobstructed walls are usually faster to insulate than finished spaces that require careful removal and replacement of interior materials. A two-person crew may install roughly 300-600 square feet in a day on an uncomplicated job; tight crawlspaces, foundation irregularities, and extensive cutting can reduce that output.
Labor rates often land around $50-$100 per worker-hour, but regional wages and contractor minimums vary. Basement work may also require moving stored items, protecting finished surfaces, or coordinating with waterproofing work. Ask for the estimated crew size, work hours, and included surface preparation.
When Removal, Delivery, or Moisture Repairs Raise the Bill
Delivery may add $50-$200, particularly for small orders or sites far from a supplier. Removing old insulation can add $0.25-$1.00 per square foot, with additional charges possible for contaminated material or difficult disposal. These items can turn a simple materials estimate into a much larger project total.
Water-damaged framing, active leaks, or an uneven foundation can require separate repairs before boards are installed. A contractor may also charge a minimum service fee of $150-$400 for a small repair or partial installation. Have the quote separate insulation work from water control, framing repairs, and debris hauling.
XPS Prices Compared With EPS and Polyiso Boards
XPS is not the only rigid-foam option. EPS commonly costs about $0.30-$1.25 per square foot, while polyiso often runs $0.70-$2.00 per square foot, depending on thickness and facing. XPS usually falls around $0.47-$2.03 per square foot. These are broad material ranges, not direct comparisons of equal thickness or performance.
Temperature, moisture exposure, installation location, and the required R-value can affect which board is suitable. A lower-priced panel may not meet a project’s code or performance needs, and polyiso performance can vary with temperature. Compare labeled R-value, intended use, and total installed cost rather than price per sheet alone.
Three XPS Quotes for Different Project Sizes
A 120-square-foot garage wall using 1-inch board might need four sheets before waste. At $25 per sheet, $40-$90 in supplies, and 5-7 labor hours at $60-$85 per hour, a professional total could be about $440-$735.
A 500-square-foot basement wall using 1-inch board might require 17 sheets plus waste. At $25-$35 per sheet, $100-$200 in supplies, and 18-26 labor hours at $60-$85 per hour, the estimate could land around $1,600-$3,000, before removal or wall repairs.
A 500-square-foot foundation project using 2-inch board could use 17-18 sheets at $40-$60 each. With $150-$300 in fastening and sealing supplies and 20-30 labor hours at $60-$90 per hour, the total may be $2,000-$3,700. These examples illustrate how thickness and installation scope change a quote, not fixed national rates.