Does recycled plastic lumber burn?
Under normal conditions and use, temperature fluctuation will not affect plastic lumber. No profile distortions will occur within the temperature range of 20 degrees F (Fahrenheit) to 120 degrees F. Like wood, recycled plastic lumber will burn when exposed to a combustion source for a long period of time and fed by a cellulose material. Recycled plastic lumber has a flash point of 625 degrees F vs. wood at 425 degrees F.