J & S Supply is a recognized distributor of Dow Thermax Insulation serving New York, NYC, Brooklyn, Queens, Long Island, Westchester, New Jersey, and Connecticut. Dow Thermax Insulation is a polyisocyanurate rigid board insulation for interior and exterior continuous insulation. Thermax products include an innovative core surrounded by a tough exterior facer of a variety of ranges and aesthetic appearance. The core is produced with free-rise technology, exclusively offered by Dow— providing a homogenous core with a finer cell size and better cell orientation reducing wormholes and knit lines for one of the highest R-values available (R-6.5 at 1″), outperforming in even cold temperatures.

Dow Thermax Insulation is also engineered with unique fiberglass reinforced core for enhanced fire performance making it the only polyisocyanurate insulation to have FM 4880 approval and can be used on walls and ceilings, up to 30 ft. It can be used in exterior steel stud walls in commercial applications, walls, ceilings and roofs for commercial, residential and agricultural buildings, exposed wall and ceiling applications, interior finish systems for walls and ceilings in metal, wood post frame and concrete or masonry buildings within both high and light-impact areas, standing seam metal roofs, and even residential closed (non-vented) crawl spaces and interior basement walls.

Dow Thermax Insulation provides continuous insulation on the interior or exterior with one of the highest R-values available. It features a distinct free-rise technology for better product consistency, durability and fire performance over generic polyisocyanurate insulations and is approved for fire exposure. Dow Thermax contains UV-stable technology and can remain uncovered up to six months. It reduces the potential for condensation within the wall assembly resulting in long lasting performance due to its low perm rating and high insulating value, eliminates the extra step of installing a membrane or building wrap, and can be installed exposed to the interior without a thermal barrier.

Dow Thermax Insulation
Thermax Heavy Data Sheet
Thermax Xarmor (ci) Data Sheet
Thermax (ci) Data Sheet

Our prime location in Long Island City is close to every major thoroughfare in the Metropolitan New York and New Jersey area, ensuring our fleet of specialized equipment can deliver fast.


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