AP Foil-Faced Polyiso Board Insulation, 0.5-in x 4x8, R-2.9

Rigid polyisocyanurate foam sheathing with foil facer delivers high thermal performance and air, vapor, and water-resistive barrier functions when properly installed. Ideal as continuous exterior insulation for above-grade walls and various residential and commercial applications.

Key Features:

• High R-Value per Inch: Polyiso core provides R-2.9 at 0.5-in thickness (R-6 per inch) for efficient thermal control
• Dual Foil Facers: Reflective exterior foil and white interior foil enhance energy performance and installation orientation
• Barrier Functions: When properly installed, acts as water-resistive barrier, vapor barrier, and air barrier
• Lightweight & Easy to Cut: Handles easily and can be cut with a utility knife or saw for quick installs
• Low Permeability & Fire Performance: Helps control condensation and remains intact during fire exposure (ASTM E84)

Specifications Table:

Frequently Asked Questions (FAQ):

Q: Can this be used as continuous exterior insulation on residential walls?
A: Yes—AP Foil-Faced Polyiso is designed for use as insulated sheathing and continuous exterior insulation on above-grade walls.

Q: Which side faces outward during installation?
A: In most applications, install the reflective foil side toward the exterior and the white non-reflective side toward the interior.

Q: Does this product function as an air or vapor barrier?
A: When properly installed, it serves as an air barrier and vapor barrier, and also as a water-resistive barrier.

Q: How do I cut and handle the boards?
A: The lightweight boards can be cut with a utility knife or saw for straightforward handling and fitting.

Q: Is it environmentally friendly?
A: It’s produced with an EPA-compliant blowing agent with zero ODP and virtually no GWP, and meets CFC- and HCFC-free requirements.

Sleek Thermal Shield for Modern Envelopes

This foil-faced panel brings an architectural crispness to wall assemblies, creating a seamless, polished envelope that heightens energy performance. The reflective surface is a standout—clean, modern, and purposeful—sending warmth back where you want it. Use it as continuous exterior insulation to streamline façades and reduce thermal bridging. It’s a quiet luxury upgrade that makes homes feel smarter, tighter, and undeniably refined.

Upgrade your envelope with JM AP Foil-Faced Polyiso and lock in efficient, code-ready performance today.