Dow XPS 150 Blue Board - All Sizes XPS Blue Board
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Dupont XPS 150 Blue Board - All Sizes

SKU: XPS150 BB-1

Est Delivery between and .

Estimated Delivery Time 7-10 Working Days

Please Note We Can Not Ship To The Following States: California, Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Rhode Island, Vermont, Virginia, Washington

XPS Insulation Blue Board is a nonstructural, rigid board insulation manufactured of Extruded Polystyrene Foam (XPS). Blue Board can be used both on exterior and interior walls to give you a continuous insulation barrier that can increase effective R-value of the wall by up to 20%. First manufactured in 1941, Dupont's blue colored extruded polystyrene has been an industry leader ever since. Extruded Polystyrene Foam offers high, long-term R-value and excellent compressive strength. Blue Board's closed cell structure and lack of voids resists moisture penetration thus increasing its thermal efficiency and protecting underlying materials from water damage. When used with Weathermate construction tape to cover seams and Great Stuff sealants to seal gaps, Dupont STYROFOAM™ insulation board provides a barrier against air leakage and infiltration.


  • Residing Board - Use over existing siding as an underlayment for new siding.
  • Residential Sheathing - Use over plywood or OSB sheathing as an underlayment for siding.
  • Tongue and Groove Insulation - Use on foundation walls or interior basement walls. Edge treatment helps boards fit snugly against each other.
  • Scoreboard - Scored Square edge insulation board scored on 16" and 24" centers making it easy to snap into convenient widths.


STYROFOAM™ Brand Scored Square Edge Extruded Polystyrene Foam (XPS) Insulation helps protect foundation dampproofing and waterproofing, especially during backfilling. It also provides a secondary barrier against groundwater leakage. With STYROFOAM™ Brand Scored Square Edge Insulation, freeze-thaw cycling of the foundation wall is minimized, reducing the potential for cracking. And a warmer foundation can reduce the potential for condensation.

STYROFOAM™ Brand Scored Square Edge Insulation can be used against commercial interior walls and exterior foundation walls in above- and below-grade applications. STYROFOAM™ Brand Scored Square Edge Insulation can be used under the slab or over the deck or subfloor. STYROFOAM™ Brand Scored Square Edge Insulation is suitable for use in pervious, semi-pervious, and practically impervious soils.

Product Length 96"
Product Width 48"
Brand Dupont
Cell Structure closed cell
Compressive Strength 25psi (kPa)
Edge Profile Scored Square Edge
Material Facing un-faced
Material type XPS
Product Type Rigid Board
Water Absorption 0.3% by volume
Water Vapor Permeance 1.5 perm

Est Delivery between and .

Delivery will always take place on a weekday (Mon - Fri).
For information on delivery costs and more view our delivery info page.