... years 4Weather resistant, suitable from -40to60 5Durabl The advantages of the Forest brand WPC decking as follow:1. ... Looks like the natural wood,with the surface treatments like the finished, the wood grain finish, the ring finish,and the clean finish ... insects, and moldy-proof.8.Fire retardant,reach the high level, safe to use in-building.9. ... to install and clean. WPC pergola&building gallery frame