Specification

*Thermo-ply Reflective Foil System R-values are only for Thermo-ply and the reflective air space between Thermo-ply and siding. Insulation was
in complete contact with inside of Thermo-ply for test. R-values for siding, cavity insulation, gypsum and air film corrections ARE NOT INCLUDED
in Thermo-ply System R-values since many combinations are possible, but they can be added to Thermo-ply System R-value to obtain total Wall
R-value. All tests were run according to ASTM C-236 at 75
o
F mean temperature, 30
o
F temperature differential.
**These lapped horizontal sidings form a variable reflective foil airspace with one foil surface on the Thermo-ply. This airspace varies between
zero and the thickness or depth of the siding.
***Brick veneer is installed with
3
/4” airspace. Siding must be spaced out
3
/4” with furring strips. The airspace is a reflective foil airspace with one
foil surface.
0.68 Inside Air Film
0.45 1/2” Gypsum
0.00 Kraft (Asphalt Coated) or Polyethylene Vapor Barrier
13.00 R-13 Fiberglass Insulation
0.20 Thermo-ply®
3.50 3/4” Reflective Airspace
0.41 Brick Veneer
0.17 Outside Air Film
18.41 TOTAL R-VALUE
0.0543 TOTAL U-VALUE
0.68 Inside Air Film
0.45 1/2” Gypsum
0.00 Kraft (Asphalt Coated) or Polyethylene Vapor Barrier
13.00 R-13 Fiberglass Insulation
0.20 Thermo-ply with Foil Facing
3.50 3/4” Furring Strip with Reflective Airspace
0.41 Hard Wood Siding
0.17 Outside Air Film
18.41 TOTAL R-VALUE
0.0543 TOTAL U-VALUE
0.68 Inside Air Film
0.45 1/2” Gypsum
0.00 Kraft (Asphalt Coated) or Polyethylene Vapor Barrier
13.00 R-13 Fiberglass Insulation
0.20 Thermo-ply with Poly Facing
0.67 Vinyl Siding
0.17 Outside Air Film
15.17 TOTAL R-VALUE
0.0659 TOTAL U-VALUE
Type of Siding Used
(See Notes Below)
R-value of Thermo-ply
alone or with Poly Facing
Average System R-value* for Thermo-ply
plus one Reflective Foil Airspace Between
Thermo-ply and Siding
Average R-value of
Thermo-ply with foil
facing and Airspace
Lapped Sidings - Aluminum, Vinyl,
Hardboard, Wood, etc.**
Brick Veneer and Furred-Out Siding
with 3/4” Airspace***
0.2
0.2
1.33
3.5
1.53
3.7