CertainTeed FlintBoard® ISO Cold Polyisocyanurate Roof Insulation features a closed-cell polyiso core with integrally laminated heavy, coated glass facers. FlintBoard ISO Cold has been specifically engineered with a more durable facer and higher dimensional stability for use with roofing systems that utilize cold applied adhesive as the membrane bonding agent. Suitable systems include single ply, cold applied modified bitumen and cold applied BUR. DO NOT use with hot asphalt, coal tar or hot applied membranes.

FlintBoard ISO Cold is available in 4' x 4' and 4' x 8' panels, in a variety of thicknesses.

Technical Information

CertainTeed FlintBoard ISO Cold is offered in a variety of thicknesses, providing long-term thermal resistance (LTTR) value from 6.0 to 25.0. FlintBoard ISO Cold is also available in 25-psi formula. Available in 4' x 4' (1220mm x 1220mm) and 4' x 8' (1220mm x 2440mm) panels.

For additional technical resources please refer to the CertainTeed Commercial Roof Systems Manual.


Before installation begins, the roof deck must be firm, well attached, even, clean and dry.

Do not leave exposed. FlintBoard ISO Cold is a polyiso organic plastic foam and will burn if exposed to an ignition source of sufficient heat and intensity, or open flame, such as a welder's torch. Do not apply flame directly to FlintBoard roof insulations.

For detailed installation instructions please refer to the CertainTeed Commercial Roof Systems Manual.

Warranty Details

CertainTeed offers four low-slope roof system warranty options: Limited Warranty on Materials, Limited Warranty on Systems, No Dollar Limit (NDL) Limited Warranty and Full System NDL Limited Warranty.  CertainTeed warranty durations are based on a combination of system specification and product selection.  Additionally, CertainTeed offers a stand-alone FlintBoard Warranty backing the long term R-value, its ability to resist the flow of heat through the board.  Please download an overview of these warranty options for details. Consult with your contractor or CertainTeed Territory Manager to determine which warranty is best for your project.     

CertainTeed offers standard low-slope roof system warranty durations between ten and twenty-five years.  Additionally, Gold Star Contractors can increase warranty durations by 25% by engaging in an Integrity Maintenance Agreement with their client.  

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