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Insteel Manufacturing and Inventory
The poly core comes in a 1 lb density. The thickness and weight of poly will alter the thermal barrier and R-value. The poly core of the Tridipanels can be ordered in thickness of 1 1/2" to 5". The polstyrene is a non-flammable material as tested under ASTM E84. The smoke rating is less than 450 as a result of ASTM E84. Thus, we conclude that our material is nonflamable and nontoxic if exposed to fire. The poly core is also water resistant. The ASTME E84 test proved maximum water absorption of 2.5% for 1 lb. density. Polystyrene is an inert, organic material. Poly provides no nutritive value to plants, animals or microorganisms. The poly will not rot and is highly resistant to mildew. Aging has no effect upon the performance ofpoly. Poly can withstand temperatures from sub-freezing to 180 degrees, assuring long- term performance. 
Telephone (760) 643-2307, Fax (760) 643-2305 or E-Mail us.
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