All of our information is sourced from manufacturer data.

AP Foil-Faced Foam Sheathing

Johns Manville Roofing Systems

AP Foil-Faced Foam Sheathing

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Board Insulation Board Insulation

Foam Board Foam Board

Polyisocyanurate Polyisocyanurate

Roof, Sloped Ceiling Roof, Sloped Ceiling

Design Options

Product Description

Johns Manville AP Foil-Faced Polyiso Continuous Insulation board consists of a uniform closed-cell polyisocyanurate foam core bonded on each side to a foil facer. AP Foil provides exceptional heat, moisture and air control and, when installed correctly, eliminates all major thermal bridges that cause heat loss. The rigid board sheathing has a one-inch layer of continuous insulation for maximium wall and worksite efficieny.



Standard Sizes: 4' 0"


Standard Sizes: 8' 0", 9' 0", 10' 0"


Standard Sizes: 0-1/2", 0-3/4", 1", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4", 4-1/2"

Manufacturer Design Notes

AP Foil-Faced Polyiso Continuous Insulation is nonstructural. The walls must be braced in accordance with the requirements of the applicable code.

Performance Data

R-Value Per Inch

Measure of the thermal resistance of the product per inch of thickness, imperial units.

°F·ft^2·h / BTU / inch


NRC Value

The Noise Reduction Coefficient values of this product

Fire Resistance

Amount of time the product can withstand fire

Dimensional Stability

The percent that a product's dimensions vary due to aging or environmental conditions.



Flame Spread

As defined by the ASTM E84 testing standard


Compressive Strength



Tensile Strength




Measure of the thermal resistance of the product, imperial units.

°F·ft^2·h / BTU

2.9, 5, 6, 9.3, 13, 16, 19, 22, 26, 28

Water Vapor Transmission

An imperial perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury

perm (imperial)


Smoke Development

As defined by the ASTM E84 testing standard


Johns Manville Roofing Systems