No Sweat Slabs

Insulating under or over slabs (including radiant-heated designs) helps reduce the potential for condensation or "sweating," reduce energy loss and increase the comfort of the home's occupants. And to reduce the potential for mold, it's critical to insulate slabs that will have floor coverings.

With rugged STYROFOAM™ Brand Extruded Polystyrene Insulation, insulating under the slab before the concrete is poured/placed can be a "no sweat" proposition. Even after the slab is in place it's still not too late to add energy-efficient, moisture-resistant STYROFOAM™ Brand Insulation.

U.S.

Project Specifications Recommended Dow Solutions
  • Insulate under basement slab or concrete slab of living areas
  • Reduce potential for condensation and mold
  • High compressive strength
Learn about high-load slab solutions from Dow
  • 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

Enhanced Installation

Learn more about weatherization

  • Insulate over basement slab or concrete slab of living areas
  • Reduce potential for condensation and mold
  • High compressive strength

Learn about high-load slab solutions from Dow

  • 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

Enhanced Installation

Learn more about weatherization

Literature
Improve Energy Efficiency and Moisture Performance of Foundations (1MB PDF)
  
(1) Consult the label and Material Safety Data Sheet before use.
 

Canada

Project Specifications Recommended Dow Solutions
  • Insulate under basement slab or concrete slab of living areas
  • Reduce potential for condensation and mold
  • High compressive strength

Learn about high-load slab solutions from Dow

  • 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

Enhanced Installation

  • Insulate over basement slab or concrete slab of living areas
  • Reduce potential for condensation and mold
  • High compressive strength

Learn about high-load slab solutions from Dow

  • 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

(1) Consult the label and Material Safety Data Sheet carefully before use.
Literature
Improve Energy Efficiency and Moisture Performance of Foundations (Canada) (1.6MB PDF)

 

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