In a few simple steps, rigid foam insulation from Dow creates an energy-efficient and moisture-resistant basement.

Just Right Inside

Whether plans call for a "man cave" or a preschoolers' paradise, rigid foam insulation from Dow can help turn a cold, damp basement into a dry, comfortable, usable room that can contribute to enhanced energy efficiency throughout the home.

In masonry construction, rigid foam insulation helps reduce all three forms of heat transmission (convection, radiation and conduction). The reflective air space formed in some furred systems adds R-value plus an open area for wiring if desired.

U.S.

Project Specifications Recommended Dow Solutions
  • Insulate flat, even basement wall with drywall to finish
  • Adhere insulation directly to concrete wall
  • Scored at 16" and 24" on center
  • Easy to snap to convenient widths
  • Square edge
  • 3/4" -3" thicknesses
  • 25 psi
STYROFOAM™ Brand SCOREBOARD™ Insulation
  • Square edges on all four sides
  • 3/4"-4" thicknesses
  • Two board size options
  • 25 psi
STYROFOAM™ Brand Square Edge Insulation
  • Interlocking fit
  • 3/4"-2" thicknesses
  • Three board size options
  • 25 psi
STYROFOAM™ Brand Tongue and Groove Insulation
  • Slotted board edges accommodate nailing strip for ease of attachment
  • 1-1/2", 2.0" thicknesses
  • 15 psi
STYROFOAM™ Brand WALLMATE™ Insulation
  • Three-ply poly/aluminum facers for exceptional strength and durability
  • 1/2"-1" thicknesses
  • Two board size options
  • 25 psi
Super TUFF-R™ Insulation
  • Radiant barrier-quality aluminum foil facers
  • 1/2"-1" thicknesses
  • Two board size options
  • 25 psi
TUFF-R™ Insulation

Enhanced Installation

Learn more about weatherization

  • Insulate uneven basement wall with drywall to finish
  • Fasten insulation directly to stud framing
  • Scored at 16" and 24" on center
  • Easy to snap to convenient widths
  • Square edge
  • 3/4" -3" thicknesses
  • 25 psi
STYROFOAM™ Brand SCOREBOARD™ Insulation

Enhanced Installation

Learn more about weatherization

  • Leave insulation exposed to the interior
  • Insulate even, flat wall without drywall finish
  • Glass-fiber-reinforced polyisocyanurate foam core for improved fire resistance
  • Aluminum foil facers
  • 1/2"-2" thicknesses
  • Three board size options
  • 25 psi
THERMAX™ Sheathing
  • White acrylic-coated aluminum facer on one side, aluminum facer on other
  • Glass-fiber-reinforced foam core for improved fire performance
  • Pressure-washable at 1000 psi
  • Square edge and shiplap edge options
THERMAX™ White Finish

Enhanced Installation

Learn more about weatherization

  • Insulate masonry wall in warm climate
  • Square edges on all four sides
  • 3/4"-4" thicknesses
  • Two board size options
  • 25 psi
STYROFOAM™ Brand Square Edge Insulation
  • Interlocking fit
  • 3/4"-2" thicknesses
  • Three board size options
  • 25 psi
STYROFOAM™ Brand Tongue and Groove Insulation
  • Three-ply poly/aluminum facers for exceptional strength and durability
  • 1/2"-1" thicknesses
  • Two board size options
  • 25 psi
Super TUFF-R™ Insulation
  • Glass-fiber-reinforced polyisocyanurate foam core for improved fire resistance
  • Aluminum foil facers
  • 1/2"-2" thicknesses
  • Three board size options
  • 25 psi
THERMAX™ Sheathing
  • Radiant barrier-quality aluminum foil facers
  • 1/2"-1" thicknesses
  • Two board size options
  • 25 psi
TUFF-R™ Insulation

Enhanced Installation

Learn more about weatherization

 
Literature
Below Grade Insulation: The foundation of effective energy savings (U.S.) (536KB PDF)
Improve Energy Efficiency and Moisture Performance of Foundations (1MB PDF)
Performance and Value Revealed: THERMAX™ for Basements and Crawl Spaces (516KB PDF)
Start off on the Right Foot With THERMAX™ Sheathing and THERMAX™ White Finish Insulation (276KB PDF)
Installation Instructions
Installation Instructions for Insulating Concrete Walls in Warm Climates
Interior Basement Wall (Even Wall w/Drywall Finish) – Installing STYROFOAM™ Tongue & Groove, SCOREBOARD™ or Square Edge
Interior Basement Wall (Foam and Stud Wall Framing) – Installing STYROFOAM™ Square Edge, Tongue & Groove, SCOREBOARD™, Super TUFF-R™, or TUFF-R
Installation Procedures for THERMAX™ Insulations: Exposed Basement Applications (216KB PDF)
Installing THERMAX Sheathing on Interior of Basement Walls
Masonry Wall Systems – Installing TUFF-R/Super TUFF-R THERMAX Sheathing on Interior of Basement Walls
 (1) Consult the label and Material Safety Data Sheet carefully before use.

Canada

Project Specifications Recommended Dow Solutions  
  • Insulate flat, even basement wall with drywall to finish
  • Adhere insulation directly to concrete wall
  • 2' x 8' (600 mm x 2400 mm) boards
  • 1/2"-1-1/2" (13 mm-38 mm) thicknesses
  • Butt edge and shiplap edge options
  • 16 psi (110 kPa)
STYROFOAM™ Brand CLADMATE™ Insulation
  • Convenient larger 4' x 9' (1200 mm x 2700 mm) boards
  • 1"-2" (25 mm-50 mm) thicknesses
  • Shiplap edge
  • 16 psi (110 kPa)
STYROFOAM™ Brand CLADMATE™ XL Insulation
  • 2' x 8' (600 mm x 2400 mm) boards
  • 1"-4" thicknesses
  • Butt edge and shiplap edge options
  • 30 psi (210 kPa)
STYROFOAM™ Brand SM Insulation
  • Slotted board edges accommodate nailing strip for ease of attachment
  • 2' x 8' (600 mm x 2400 mm) boards
  • 1.5"-2.4" (38 mm-60 mm) thicknesses
  • 16 psi (110 kPa)
STYROFOAM™ Brand WALLMATE™ Insulation

Enhanced Installation

  • Insulate uneven basement wall with drywall to finish
  • Fasten insulation directly to stud framing
  • 2' x 8' (600 mm x 2400 mm) boards
  • 1/2"-1-1/2" (13 mm-38 mm) thicknesses
  • Butt edge and shiplap edge options
  • 16 psi (110 kPa)
STYROFOAM™ Brand CLADMATE™ Insulation
 
Literature
Improve Energy Efficiency and Moisture Performance of Foundations (1.6MB PDF)
Installation Instructions
Installing STYROFOAM CLADMATE/CLADMATE XL or STYROFOAM SM – Interior of Basement Wall
Installing STYROFOAM CLADMATE/CLADMATE XL or STYROFOAM SM – Interior of Basement Wall with Stud Wall Framing and Batt Insulation
 (1) Consult the label and Material Safety Data Sheet carefully before use. 

Dow can help you get to the bottom of your foundation insulation questions.