STYROFOAM™ Brand Tongue and Groove Insulation (U.S. Only)

A Type IV extruded polystyrene foam insulation with tongue and groove edges.

Used In

  • For a wide range of commercial and residential applications

Product Advantages

  • Contains an average of 20% pre-consumer recycled content certified by UL Environment Inc.
  • Tongue and groove edges help boards fit snugly against one another
  • Tongue and groove on all four sides of 2' x 8' boards 1" thick or less and on the long edges of all other boards
  • Lightweight
  • Moisture resistance
  • Thermally efficient
  • Minimum compressive strength of 25 psi

Typical Physical Properties

These properties are typical but do not constitute specifications.

STYROFOAM™ Tongue and Groove - U.S. Residential

Nominal Board Thickness(1), in R-Value(2) Board Size, ft Edge Treatment Min Compressive Strength(3), psi
.75 3.8 2 x 8 / 4 x 8 / 4 x 9 Tongue and Groove 25
1.0 5.0 2 x 8 / 4 x 8 / 4 x 9 Tongue and Groove 25
1.5 7.5 2 x 8 / 4 x 8 / 4 x 9 Tongue and Groove 25
2.0 10.0 2 x 8 / 4 x 8 / 4 x 9 Tongue and Groove 25

(1) Not all product sizes are available in all regions.

(2) R means resistance to heat flow. The higher the R-value, the greater the insulating power. R-values are expressed in ft2• h•°F/Btu. R-value determined by ASTM C518.

(3) Vertical compressive strength is measured at 10% deformation or at yield, whichever occurs first.

STYROFOAM™ Tongue and Groove - U.S. Commercial

Nominal Board Thickness(1), in R-Value(2) Board Size, ft Edge Treatment Min Compressive Strength(3), psi
.75 3.8 2 x 8 / 4 x 8 Tongue and Groove 25
1.0 5.0 2 x 8 / 4 x 8 Tongue and Groove 25
1.5 7.5 2 x 8 / 4 x 8 Tongue and Groove 25
2.0 10.0 2 x 8 / 4 x 8 Tongue and Groove 25

(1) Not all product sizes are available in all regions.

(2) R means resistance to heat flow. The higher the R-value, the greater the insulating power. R-values are expressed in ft2• h•°F/Btu. R-value determined by ASTM C518.

(3) Vertical compressive strength is measured at 10% deformation (5% for STYROFOAM™ Brand HIGHLOAD 40, 60 and 100 Insulation products) or at yield, whichever occurs first. Since STYROFOAM™ Brand Extruded Polystyrene products are visco-elastic materials, adequate design safety factors should be used to prevent long-term creep. Adequate design safety factors are needed. For more information visit our Answer Center.

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