Correct installation, over proper substrates, is a must to profit from cedar’s natural attributes. Research the appropriate backing materials for your area and always use stainless steel or hot-dipped galvanized nails of the appropriate length. Never use electroplated, or uncoated nails. These will rust, and stain the siding or worse, weaken the siding and lead to expensive repairs. It’s also a good idea to clean your siding yearly with a stiff broom or brush. Like any thing of value, caring for your cedar will keep it looking new for years to come; and with care, may very well last a lifetime and beyond.