Stain All Sides of the deck board with TWP? – TWPStainHelp.com
When staining a deck using TWP, is it necessary to stain all sides of each board? Consider the reason for staining wood – to shield it from weather damage, which causes rot and decay. This can lead to an unsightly appearance and structural failure.
Wood that is exposed to the elements will experience constant changes. Wood swells as it absorbs water and moisture, then shrinks when it dries out. These constant changes begin to break down the cellular structure of the wood causing it to crack, split, and warp. Ultraviolet rays fade and discolor the wood leading to a neglected appearance.
To prolong the life of any wood structure, and help maintain its original appearance, it needs to be coated with a weather-resistant stain like TWP. However, because at least one side of the boards will not be as exposed to weather as the other sides, it is not necessary to stain all sides with TWP. The bottom sides of deck boards, for example, are not exposed to much water or UV rays.
The only reason to stain all sides with TWP would be for aesthetic purposes. On a second-story deck, having all sides stained with TWP would be more appealing. This is a purely personal preference. To stain all sides with TWP for appearance is going to be more expensive and labor-intensive. It would take double the amount of stain and time to stain the underside of a deck.
To ensure the wood is shielded from weather and will stand the test of time, staining with TWP is a good investment. To stain all sides with TWP is really only for appearance where applicable but certainly is not necessary. It is really up to the deck owner whether or not to stain all sides. Not doing so will not lend a hand to weather damage or shorten the life of the structure in any way.
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