Envirosheet is a high performance flat sheet rigid foam insulation made from Expanded Polystyrene (EPS).

Envirosheet provides the best value and economy because it provides the highest r-value per dollar of all generic rigid insulation types on the market.


  • Creates thermal envelope for maximum heat/cooling efficiency
  • Moisture resistant for lasting performance
  • Provides level surface for finishings
  • Lightweight, easy to handle
  • Recyclable, contains no CFCs or HCFCs

Size & Density
To meet your unique construction needs, we offer a broad range of products, both conventional and innovative, for every kind of building insulation application.

Envirosheet is available in 2′ x 8′ and 4′ x 8′ sheets in compressive strengths of 12.5 psi, 22.4, psi and 37.3 psi, in both regular and shiplap joint.  Special orders can also be easily accomodated.

ES-12 Envirosheet Expanded Polystyrene (EPS) foam board applied over exterior walls eliminates thermal bridging, reduces air infiltration and provides a higher r-value. Various finishes including, stucco, siding, brick veneer and all other traditional exterior finishes can easily be used in combination with Amvic EPS insulation.

ES-22 and ES-37 Envirosheet Expanded Polystyrene (EPS) foam board can be applied directly over damp proofing or waterproofing systems and anchored (various/optional) into the concrete/block walls. Amvic EPS foam board remaining above grade must be UV protected with parging coats to prevent damage.

Click here for Technical & Installation Manual

Physical Properties of Envirosheet®

Product Designation
Standard Description ES-12 ES-22 ES-37
ASTM D1622 Density lb/ft³
Density Kg/m³
1.0 lb/ft³
16.0 Kg/m³
1.4 lb/ft³
22.0 Kg/m³
2.0 lb/ft³
32.0 Kg/m³
ASTM C518 R-Value/1-inch @ 75°F
RSI/25mm @  24°C
3.9 ft2•h•°F/BTU
0.65 (m2•°K/W)
4.0 ft2•h•°F/BTU
0.70 (m2•°K/W)
4.3 ft2•h•°F/BTU
0.76 (m2•°K/W)
ASTM STP1320 R-Value/1-inch @ 0°F
RSI/25mm @ -18°C
4.6  ft2•h•°F/BTU
0.81 (m2•°K/W)
4.8 ft2•h•°F/BTU
0.84 (m2•°K/W)
5.0 ft2•h•°F/BTU
0.88 (m2•°K/W)
ASTM D1621 Compressive strength at 10% strain 12.5 psi
(86.0 kPa)
22.4 psi
(154.6 kPa)
37.3 psi
(257.4 kPa)
ASTM C203 Flexural strength 27.8 psi
(192.0 kPa)
45.0 psi
(310.0 kPa)
63.2 psi
(436.0 kPa)
ASTM D2842 Water absorption (% by volume) 3.8% 1.87% 1.57%
ASTM E96 Water vapor permeance 282.0 ng/Pa.s.m2
(4.95 perm)
187.23 ng/Pa.s.m2
(3.29 perm)
104.29 ng/Pa.s.m2
(1.83 perm)
ASTM D2126 Dimensional Stability
Linear change
-1.5% -1.5% -1.3%
ASTM D2863 Limiting Oxygen Index >24% >24% >24%

Surface Burning Characteristics of Envirosheet® in accordance with CAN/ULC-S102.2

Material Details Classification or Rating
Maximum Density
Flame Spread
25 (min) 16 225 475
25 22 240 500
50 22 200 380
75 22 205 495
100 22 175 over 500
25-100 32 220 over 500

Expanded Polystyrene (EPS) is a combustible material. When tested in accordance with CAN/ULC S102.2, combustible material of greater density or increased thickness will increase fuel loading and hence increase the measured flame spread ratings.