DuraGrain is 100% cellular vinyl that works like wood but does not have any of the headaches. DuraGrain will never rot and is low maintenance. It will perform for years in high moisture or humid environments. Just like wood, DuraGrain can be cut, nailed and painted but is free of the natural defects and surface blemishes found in wood. When it comes to conserving energy, not only for cost purposes but also for environmental reasons, DuraGrain insulates 70% better than wood and 1600% better than aluminum. DuraGrain is specified for cost effectiveness, low environmental impact, low maintenance, proven performance and reliability.