EnerSpan M-24 insulation is a moulded graphite polystyrene board that is ship-lapped on all 4 edges, manufactured using Neopor® provided by BASF, a graphite-enhanced raw material that reduces radiation heat transfer resulting in higher thermal resistance (R-value) compared to standard CAN ULC S701.1, Type 2 EPS insulation.

With an R-value of 4.7 per inch, EnerSpan M-24 helps you achieve your desired R-value with a thinner board. EnerSpanM-24 insulation is easy to work with and install, and consistently delivers the highest true R-value performance over time. This high-performing insulation is breathable, while the closed-cell structure does not support the growth of mold, while adapting to all climate zones. With the higher compressive strength of 24 psi, EnerSpan M-24 is a versatile insulation product that can be used in a wide range of applications, but it ideal when higher compressive resistance is required.

The ship-lap edges of the insulation ensure complete, continuous insulation in your application.

  • 2x8 ft., 24” bundles
  • 1 ½, 2, and 3 inch thicknesses available
  • Closed-cell structure is moisture resistant to provide long-term durability
  • Compressive Resistance of 24 psi
  • Thermal resistance of True R-value of 4.7 per inch
  • Closed cell insulation resists moisture
  • Easy to cut and install
  • Permanent R-value
  • Increases energy efficiency for reduced heating and cooling costs
  • Can be used for retrofit or new construction
  • Uses up to 30% less material than other rigid foam insulation to achieve the same R-value, saving on building materials and installation labor
  • Thinner boards are needed to reach the desired R-value than others so the same effect is achieved with less material
  • Adaptable and versatile
  • Cost-effective
  • Shiplap provided on all four edges of board

Material Properties of EnerSpan® M24 Insulation

Material Property Test Method Units Property Values
Compressive Resistance
Minimum @ 10% Deformation
ASTM D1621
ASTM
D1621
kPa
(psi)
110
(16)
Compressive Modulus
Minimum
ASTM
D1621
kPa
(psi)
4000
(580)
Thermal Resistance
Minimum RSI per 25mm (inch)
ASTM
C518
m20C/W
(ft2•h•0F/BTU)
0.78
(4.7)
Flexural Strength
Minimum
ASTM
C203
kPa
(psi)
240
(35)
Water Vapour Permeance
Maximum
ASTM
E96
ng/(Pa.s.m2)
(Perms)
200
(3.5)
Dimensional Stability
Maximum, 7 Days @ 70± 2℃ (158±40F)
ASTM
D2126
% Linear Change 1.5
Water Absorption
Maximum
ASTM
D2842
% By Volume 4.0
Limiting Oxygen Index
Minimum
ASTM
D2863
% 24
EnerSpan M-24 Insulation Product Line
Thicknesses R-value RSI Width/Length Pcs/Bag Product
Number
1.5" (38mm) 7.1 1.20 24" x 96" 16 1306200
2" (51mm) 9.4 1.59 24" x 96" 12 1306201
3" (38mm) 14.1 2.39 24" x 96" 8 1306202

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