Repair Your Deck
This information can clarify and help answer some questions about repairing your deck.

Deck repair basics
Approximately once a year, the deck should be checked for loose boards and protruding nails, thoroughly cleaned, and resealed. Cleaning involves the removal of dirt, algae, moss, and other organic matter. Resealing is accomplished by applying a clear or semi-clear liquid sealant to all exposed surfaces.
Homeowners can do any of these tasks themselves, but often fail to do them well. Cleaning and sealing can be done well without special equipment, but it takes time and diligence. Alternatively, homeowners can rent power equipment, but along with the power to do the job more quickly comes the power to damage the deck.
For this reason, demand for professional deck-cleaning services is growing. While some decks are still made with traditional redwood (which has natural preservatives in it), most decks are now made from pressure-treated pine. Both woods look better and remain more gentle on the feet if well maintained.
-- Tips courtesy of HomeAdvisor.com