Dupont XPS 150 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%.

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.

First manufactured in 1941, Dupont's blue colored extruded polystyrene has been an industry leader ever since.

Key Features & Design

• 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.
• Use: 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.