GreenGuard GG25-LG XPS Insulation Board
Closed-cell Type IV extruded polystyrene (XPS) insulation board with a minimum compressive strength of 25 psi. Designed for below slab, cavity wall, and foundation applications with high moisture resistance and long-term thermal performance.
Produced with a blowing agent blend for GWP of less than 50. It has high water resistance and an R-value of 5.0 per inch of thickness.
It retains its insulating properties over time. Use this insulation for below slab, cavity wall, and foundation applications.
Available in a square-edge board, a ship-lap-edge board, a pre-cut 16-inch-wide board, and a score board.
Product Data
General
| Property |
Test Method |
Result |
| Nominal Thickness (in) |
- |
1/2, 3/4, 1, 1-1/2, 2, 2-1/2, 3, 4 |
| Nominal Board Width |
- |
16 in / 2 ft / 4 ft |
| Nominal Board Length (ft) |
- |
8 |
| Edge Profile |
- |
Square or Shiplap |
| Property Type |
ASTM C578 |
IV |
| Compressive Strength (psi @10%) |
ASTM D1621 |
25 |
| Water Absorption (% vol) |
ASTM C272 |
0.3 |
| Water Vapor Permeance (perm) |
ASTM E96 |
1.5 |
| Density (lb/ft) |
ASTM C303 |
1.5 |
| Max Service Temp (F) |
- |
165 |
Thermal
| Property |
Test Method |
Result |
| R-value (per inch) |
ASTM C518 |
5.0 |
| Thermal Conductivity (k) |
ASTM C518 |
0.2 |
Fire & Smoke
| Property |
Test Method |
Result |
| Flame Spread |
ASTM E84 / UL723 |
25 (Class A) |
| Smoke Developed |
ASTM E84 / UL723 |
140 |
GreenGuard GG25-LG XPS Insulation Board Product Data Table
- ASTM C578 Type IV XPS Insulation Board
- Blowing agent blend for GWP of less than 50
- More moisture resistant than standard EPS
- Retains its insulating properties over time
More Moisture Resistant
Retains insulating properties over time. Ideal for below slab, cavity wall, and foundation applications.
How do I install XPS on my basement wall?
- Glue or fasten board to wall (5 adhesive points recommended).
- Recommended adhesive: Loctite Power Grab.
- Optional: 5 Plasti-Grip PMF Anchors.
- Seal with spray foam top and bottom.
- Cover with code-approved thermal barrier (drywall).
How do I protect the above grade portion of the XPS on my foundation?
Use PVC, fiber cement, or stucco coating to protect exposed board.
What about mold, mildew, and insects?
XPS does not provide a food source for mold, mildew, or insects when properly installed.
Does your XPS foam rot?
No. XPS does not rot but must be protected from prolonged UV exposure.
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Technical Info
GreenGuard GG25-LG can be used in residential and commercial applications. It is extruded polystyrene (XPS).
Code Compliance
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