AP Foil R-13 Polyiso Foam Board Insulation, 2-in x 4-ft x 8-ft

Rigid polyisocyanurate foam board with foil facings delivers high thermal performance for continuous exterior or interior insulation. At 2 inches thick, it provides R-13 and helps control heat, moisture, and air for more energy-efficient walls and ceilings.

Key Features:

• High R-Value per Inch: Polyiso delivers R-6 per inch; 2-in board provides R-13 for efficient thermal control
• Dual Foil Facings: Reflective exterior face and white interior face optimize energy reflection and installation orientation
• Air/Vapor/WRB Function: When properly installed, serves as water-resistive, vapor, and air barrier to reduce extra layers
• Easy to Handle: Lightweight board cuts with a utility knife or saw for fast installs in walls, attics, basements, and ceilings
• Fire Performance: Thermoset material stays intact during fire exposure (ASTM E84) compared to other rigid foam boards

Specifications Table:

Frequently Asked Questions (FAQ):

Q: Can this be used as continuous exterior insulation?
A: Yes—AP Foil-Faced Polyiso is designed for continuous insulation on above-grade exterior walls and can also be used on interior walls, attics, basements, and crawl spaces.

Q: Which side should face outward during installation?
A: In most applications, install the reflective foil face toward the exterior and the white non‑reflective face toward the interior; follow siding exceptions noted by the manufacturer.

Q: What is the R-value of this 2-in board?
A: R-13 (polyiso provides approximately R-6 per inch).

Q: Does it act as a vapor or air barrier?
A: When properly installed, it functions as a water-resistive barrier, vapor barrier, and air barrier.

Q: Is it lightweight and easy to cut?
A: Yes, it’s lightweight and can be cut with a utility knife or saw.

Sleek, High-Performance Sheathing for Modern Envelopes

This foil-faced board introduces a clean, architectural surface while quietly supercharging thermal performance. The reflective face becomes a subtle design ally, channeling light and efficiency in tandem. Pair it with streamlined framing and dark cladding for a polished, high-contrast envelope. It’s a smart essential that elevates comfort and luxury through thoughtful building science.

Upgrade your envelope with AP Foil R-13 today and enjoy immediate energy savings with professional-grade, easy-to-install insulation.