How often should I stain or seal my deck? It is an oft asked question an I will provide some expertise and experience!
Look at your deck, what direction is it facing? If the answer is north or east, you probably can go a couple of years and just keep an eye on it. If on the other hand you have a west or south facing deck, it is likely to need staining every year!
Different wood species requie a different stain and levels of care. Make sure you investigate with a professional as to the appropriate stain for the wood used on you deck
You can go to http://www.charlotte.archadeck.com for more information.