DC315 applied over Spray Polyurethane Foam (SPF), is an Alternative Barrier System in “Section 2603.9 Special Approval” as a thermal barrier.

To be approved as an Alternative Barrier System, DC315 is applied over a manufacturer’s SPF and tested to the criteria of an NFPA 286, UL 1715, UL 1040, or FM 4880 for duration of 15 minutes by an accredited fire testing facility.

Products that pass an ignition barrier tested under AC 377 Appendix X are not appropriate alternative thermal barriers and cannot be used. Depending on your particular application, either ignition or thermal barriers are required by the International Building Code (IBC).

Fire Retardant Coatings

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Advantages of open and closed-cell spray insulation in residential applications

Open-cell spray foam insulation

CLOSED CELL FOAM INSULATION

Closed cell foam insulation is much denser than open cell. It has a smaller, more compact cell structure. It is a very good air barrier as well as a water vapor barrier. It is often used in roofing projects or other outdoor applications, but can be used anywhere in the home.

Spray Foam Insulation for Homes & Commercial Buildings

Spray foam insulation can be categorized into two different types: open cell and closed cell.

Open cell foam insulation

Open cell is a type of foam where the tiny cells are not completely closed. Open cell is less expensive because it uses fewer chemicals. It is a very good air barrier but does not provide any type of water vapor barrier. It is much more sponge-like in appearance. It is often used for interior walls because it provides sound reduction. It is not recommended for outdoor applications.