A deck stain needs to be able to do several things. It needs to be able to protect your wood deck from heat, abrasions, UV rays, and moisture. You want a deck stain that can continue to do these things for as long as possible. There are many things that go into determining how long a deck stain will last. While the quality of the stain itself is very important it is not the only factor to think about when figuring out the longevity of a stain.
You also need to think about the condition of the deck and its exposure to light and water. Water and UV light are the two main things that create failure in an exterior coating. Most decks are located on the sunny side of a home and will be exposed to the sun for several hours each day.
When it comes to sun exposures darker stains will give you better protection. Stain longevity is also impacted by water exposure. Exposure to snow, dew, and rain can cause damage to your stain over time. Water can seep into any cracks you may have in the surface of the wood. You want a stain that will be able to protect your deck from damage caused by water.
In order for a stain to last as long as possible the wood on the deck should be prepared before your apply the stain. Prior to adding the deck stain you should replace or repair any wood that has become rotten or damaged. The surface of the deck should be thoroughly cleaned and dried before the new stain is applied. Seriously consider sanding and power washing your deck if it has an old coat of finish. Not all stains are compatible and you want to prevent problems down the line. You want to end up with a deck that is smooth and free from splinters and damage. Learn more about buying the best deck stain for your deck.