Johns Manville AP Foil-faced sheathing board is composed of a uniform closed cell polyisocyanurate foam
core bonded on each side to a trilaminate foil facer. One side has a foil reflective facer and the other side has
a non-reflective foil facer, depending on your building needs.
AP is now produced with a non-HCFC blowing agent, meeting the latest environmental regulations for using
chemicals that do not harm the protective ozone layer in the earth's atmosphere. The new formula enhances
the positive environmental profile for this energy-saving product.
• Thermal Efficiency – provides effective resistance to heat transfer with R-values up to R-21 (RSI-3.7).
It reduces thermal bridging at the framing members where fiber glass batts don’t insulate, improving the overall thermal efficiency of walls.
• Non-corrosive – does not accelerate corrosion of pipes, wiring or metal studs.
• Durable – it will not rot, mildew or otherwise deteriorate.
• Lightweight – easy to handle, can be cut with a utility knife or saw.