The damaging effects of weather to unprotected wood are easily recognizable. Moisture is
quickly absorbed by unprotected wood causing it to swell. The sun's heat causes drying, which makes the wood shrink. These cycles of wet and dry,swelling and shrinking, cause wood to warp, split, cup and crack - all of which lead to shortened wood life and expensive repairs and replacement.
Having your wood cleaned and sealed/stained can double the life of your wood and make your decks & fences look like new again.