Meet Kingspan GreenGuard GG40-LG XPS Insulation Board—a lightweight, high-performance exterior insulation solution designed for tough loads and long-lasting energy efficiency. If you’re an installer, builder, or DIYer who wants reliable insulation that actually keeps its promises, this board is for you.
Key Features & Design
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R-value of 5.0 per inch of thickness for strong energy efficiency.
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Moisture resistance does not absorb moisture and retains insulating properties over time.
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Lightweight & easy to handle and easy to cut with a knife, making installation smoother and faster.
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High compressive strength up to 40 psi, designed for high load applications.
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ASTM rating meets ASTM C 578 Type VI requirements.
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Continuous Insulation (CI) for walls, helping reduce thermal bridging and improve overall comfort.
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Foundation protection insulates exterior foundations and protects against backfill damage.
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Size & packaging Nominal Thickness: 2 in; Nominal Board Width: 4 ft; Nominal Board Length: 8 ft; Edge Profile: Square and Channeled; 48 boards per pallet (1536 sq ft per pallet).
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Environmental & safety GWP of less than 50; Fire & Smoke: Flame Spread 25, Smoke Developed 140 (Class A) per ASTM E84 / UL723.
| Property |
Test Method |
Result |
| Nominal Thickness |
|
2 / 3 / 4 |
Nominal Board Width (ft)
Nominal Board Length (ft) |
|
2 / 4
8
|
| Edge Profile |
|
Square
Channeled
|
| Property Type |
ASTM C 578 |
VI |
Compressive Strength, Min.
(psi@ 10% deflection) |
ASTM D 1621 |
40
|
Water Absorption, Max.
(% by volume) |
ASTM C 272 |
0.3
|
Density, Min.
(lb/ft) |
ASTM C 303 |
1.8
|
Water Vapor Permeance, Max.
(perm) |
ASTM E 96
(Dessicant Method)
|
1.1
|
| Service Temperature, Max (°F) |
|
165 |
| Thermal |
|
Thermal Resistance, R-value
(°F.ft².hr / Btu per in thick)
|
ASTM C 518
(@75°F Mean Temperature) |
5.0 |
Thermal Conductivity, k-value
(Btu.in / hr.ft.ºF) |
ASTM C 518
(@75°F Mean Temperature)
|
0.2 |
| Fire & Smoke |
Flame Spread
Smoke Developed |
ASTM E 84 / UL723 |
25 (Class A)
140
|
