Johns Manville R-2.9 (16 PSI) AP Foil-Faced Polyiso Foam Board Insulation, 1/2 in. x 4 ft. x 8 ft.
AP Foil-Faced Polyiso Foam Board, 1/2 x 4x8, R-2.9
Rigid polyisocyanurate foam board with reflective foil facer delivers high thermal performance in a lightweight, easy-to-cut panel. Designed for continuous insulation, it helps control heat, moisture, and air in walls, basements, crawl spaces, and ceilings.
Key Features:
- High R-Value Efficiency: Delivers R-2.9 at 1/2 in. thickness with up to R-6 per inch for space-saving thermal performance
- Multi-Barrier Protection: When installed correctly, functions as water-resistive, vapor, and air barrier to reduce drafts and moisture
- Reflective Foil Facers: One reflective side to face the warm air surface; opposite side is white non-reflective for interior orientation
- Lightweight, Easy Install: Simple to score and snap or cut with a utility knife; suitable for residential and Type I–IV commercial uses
- Low Permeability & Fire Performance: Foil facing helps control condensation; thermoset polyiso stays intact during fire exposure (ASTM E84)
Specifications Table:
| Specification | Details |
|---|---|
| Series Name | AP Foil |
| Insulation Type | Polyisocyanurate (polyiso) rigid foam board |
| Faced/Unfaced | Foil-faced (one reflective, one white) |
| Actual Thickness (Inches) | 0.5 |
| Actual Width (Feet) | 4 |
| Actual Length (Feet) | 8 |
| Coverage Area | 32 sq ft per board |
| R-Value (Board) | R-2.9 |
| R-Value per Inch | 6 |
| Use Location | Indoor |
| For Use in Walls | Yes |
| For Use in Ceilings | Yes |
| For Use in Basements | Yes |
| For Use in Crawlspaces | Yes |
| Fits 2 x 4 Walls | Yes |
| Fits 2 x 6 Walls | Yes |
| Water Resistant | No |
| Vapor Retardant | Yes |
| Mold Resistant | No |
| Sound Barrier | No |
| Formaldehyde Free | Yes |
| ENERGY STAR Certified | Yes |
| GREENGUARD Gold Certified | Yes |
| Fire Performance | Thermoset material remains intact during fire exposure (ASTM E84) |
| Package Quantity | 1 |
| Package Weight (lbs.) | 3.21 |
| Warranty | 20-year limited |
Frequently Asked Questions (FAQ):
Q: What are the panel dimensions and coverage?
A: Each board is 1/2 in thick by 4 ft by 8 ft and covers 32 sq ft.
Q: Which way should the foil face during installation?
A: In most applications, the reflective foil side faces the warm air/exterior and the white non-reflective side faces the interior; follow local codes and cladding exceptions.
Q: Can this act as an air or vapor barrier?
A: Yes. When properly installed, AP Foil-Faced Polyiso functions as a water-resistive, vapor, and air barrier.
Q: Is it easy to cut and handle?
A: Yes. The lightweight board can be cut with a utility knife or saw for quick fitting.
Q: What certifications does it carry?
A: GREENGUARD Gold and ENERGY STAR certified; formaldehyde-free with a 20-year limited warranty.
Sleek, Space-Saving Thermal Armor
This foil-faced board wraps your envelope in a crisp, architectural sheen while quietly elevating comfort. The reflective facer becomes a modern, minimal layer that bounces warmth where you want it most. Pair it behind clean-lined cladding or gypsum for an efficient, tailored shell. It’s the smart, elegant essential for a luxe, well-insulated sanctuary.
Upgrade your envelope with AP Foil-Faced Polyiso and get high R-value performance in a slim, easy-to-install board—add it to your project today.
Original: $19.72
-70%$19.72
$5.92Product Information
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Description
AP Foil-Faced Polyiso Foam Board, 1/2 x 4x8, R-2.9
Rigid polyisocyanurate foam board with reflective foil facer delivers high thermal performance in a lightweight, easy-to-cut panel. Designed for continuous insulation, it helps control heat, moisture, and air in walls, basements, crawl spaces, and ceilings.
Key Features:
- High R-Value Efficiency: Delivers R-2.9 at 1/2 in. thickness with up to R-6 per inch for space-saving thermal performance
- Multi-Barrier Protection: When installed correctly, functions as water-resistive, vapor, and air barrier to reduce drafts and moisture
- Reflective Foil Facers: One reflective side to face the warm air surface; opposite side is white non-reflective for interior orientation
- Lightweight, Easy Install: Simple to score and snap or cut with a utility knife; suitable for residential and Type I–IV commercial uses
- Low Permeability & Fire Performance: Foil facing helps control condensation; thermoset polyiso stays intact during fire exposure (ASTM E84)
Specifications Table:
| Specification | Details |
|---|---|
| Series Name | AP Foil |
| Insulation Type | Polyisocyanurate (polyiso) rigid foam board |
| Faced/Unfaced | Foil-faced (one reflective, one white) |
| Actual Thickness (Inches) | 0.5 |
| Actual Width (Feet) | 4 |
| Actual Length (Feet) | 8 |
| Coverage Area | 32 sq ft per board |
| R-Value (Board) | R-2.9 |
| R-Value per Inch | 6 |
| Use Location | Indoor |
| For Use in Walls | Yes |
| For Use in Ceilings | Yes |
| For Use in Basements | Yes |
| For Use in Crawlspaces | Yes |
| Fits 2 x 4 Walls | Yes |
| Fits 2 x 6 Walls | Yes |
| Water Resistant | No |
| Vapor Retardant | Yes |
| Mold Resistant | No |
| Sound Barrier | No |
| Formaldehyde Free | Yes |
| ENERGY STAR Certified | Yes |
| GREENGUARD Gold Certified | Yes |
| Fire Performance | Thermoset material remains intact during fire exposure (ASTM E84) |
| Package Quantity | 1 |
| Package Weight (lbs.) | 3.21 |
| Warranty | 20-year limited |
Frequently Asked Questions (FAQ):
Q: What are the panel dimensions and coverage?
A: Each board is 1/2 in thick by 4 ft by 8 ft and covers 32 sq ft.
Q: Which way should the foil face during installation?
A: In most applications, the reflective foil side faces the warm air/exterior and the white non-reflective side faces the interior; follow local codes and cladding exceptions.
Q: Can this act as an air or vapor barrier?
A: Yes. When properly installed, AP Foil-Faced Polyiso functions as a water-resistive, vapor, and air barrier.
Q: Is it easy to cut and handle?
A: Yes. The lightweight board can be cut with a utility knife or saw for quick fitting.
Q: What certifications does it carry?
A: GREENGUARD Gold and ENERGY STAR certified; formaldehyde-free with a 20-year limited warranty.
Sleek, Space-Saving Thermal Armor
This foil-faced board wraps your envelope in a crisp, architectural sheen while quietly elevating comfort. The reflective facer becomes a modern, minimal layer that bounces warmth where you want it most. Pair it behind clean-lined cladding or gypsum for an efficient, tailored shell. It’s the smart, elegant essential for a luxe, well-insulated sanctuary.
Upgrade your envelope with AP Foil-Faced Polyiso and get high R-value performance in a slim, easy-to-install board—add it to your project today.
