Commercial | Residential | Multifamily | Wall

Reinforcement for R-values

Made for new frame walls or retrofit of existing walls in residential construction, Tuff-R™ products feature a high-performance foam core sandwiched between durable exterior facers. Rigid and water resistant, Tuff-R™ works in both interior and exterior walls.



Tuff-R™ Polyisocyanurate Insulation consists of high-performance, high R-value, closed-cell polyisocyanurate foam core boards sandwiched between a choice of durable exterior foil facers. On Tuff-R™ Insulation, one facer is a continuous sheet of aluminum foil; the other is a Tri-Plex facer consisting of a three-ply laminate of durable kraft with aluminum foil on both sides. Tuff-R™ helps reduce air infiltration through the wall by covering cracks between the framing members and sealing tightly against the studs.


Features & benefits

  • Three-ply facers with one side blue and the other side reflective foil for durability and water vapor resistance
  • Versatile
  • Can be directly applied to a variety of substrates
  • Cathedral ceilings
  • Exterior walls
  • Interior basement walls
  • Over roof decks
  • Performance
  • Exceptional thermal performance
  • Finish
  • Interior wall behind 1/2" gypsum board or equivalent thermal barrier interior finish

    Physical Properties

      Method Unit Value
    R-value per in., min<sup>1</sup> C518 ft2•h•°F/Btu 6.5
    Compressive Strength, min.<sup>2</sup> D1621 psi (kPa) 25
    Water Absorption, max.<sup></sup> C272 % by volume 0.1
    Water Vapor Permeance, max.<sup>4</sup> E96 perm (ng/Pa•s•m2) <.003
    Dimensional Stability, max<sup></sup> D2126 % linear change
    Coefficient of Linear Thermal Expansion<sup></sup> D1622 pcf
    Nominal Density<sup></sup> C578 Type 2
    Maximum Use Temperature<sup></sup> - °F (°C) 190+

    1R-values are consistent with criteria of ASTM C578 and requirements of FTC R-value rule (16 CFR Part 460).

    2 R means resistance to heat flow. The higher the R-value, the greater the insulating power.

    4Based on 1” (25 mm) thickness.


    Available Sizes

    R-Value Thickness (in.) Board Size (ft.)
    3.3 0.5 4 x 8
    5 0.75 4 x 8
    6.5 1 4 x 8
    8.9 1.375 4 x 8
    8.9 1.375 4 x 8
    9.8 1.5 4 x 8
    9.8 1.5 4 x 9
    13 2 4 x 8