Fire Performance
When FLAMEDXX is exposed to flames, a dense layer of protective char is produced on the panel surface. The charred area shields the wood form additional damage and delays more extensive burning. Because of the fire-resistant action,  FLAMEDXX OSB retards the release of fuel and heat which preserves structural soundness and reduces repair costs.

Flame Spread and Smoke Development
FLAMEDXX upholds the flame spread requirement of a Class A rating. This rating is established during ASTM E-84 (Standard Test Method for Surface Burning Characteristics of Building Materials); for 10 minutes, then extended to a 30 minute duration. Each panel of FLAMEDXX OSB bears a Class A mark identifying it as being certified to use in lieu of similar, non-combustible materials.                                                                                                                      FLAMEDXX OSB has effectively passed smoke development tests with a Smoke Development Index value of 110.

Smoke Toxicity
FLAMEDXX smoke toxicity test results, for morbidity rates under the parameters of the UPITT Test for Combustion Product Toxicity and gas emissions by the BSS7239-88 (Boeing) Test for Toxic Gas Generation by Materials on Combustion, are well below allowable toxicity limits.

Hygroscopicity
FLAMEDXX OSB only slightly increases the hygroscopic properties of untreated OSB when tested according to ASTM D 3201.