Stramit Speed Deck Ultra® Concealed Fixed Decking gives excellent durability in almost all locations. With all of its fastenings protected beneath the decking, Stramit Speed Deck Ultra® Concealed Fixed Decking can be expected to outlast through-fixed roofing. However, it is important to choose the correct coating for each application environment. Durability recommendations do vary based on the application of the product in roofing or walling installations