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Although most decks are constructed of pressure treated or synthetic lumbers that are somewhat impervious to the effects of weather, it is still necessary to consider treating the lumber to add a longer life span to the structure. This is usually done through the application of a sealant or a stain, and if the decking is not new it will also require some scrubbing or washing as well.
For the purpose of this discussion we will review the costs and materials required to stain (and clean) a deck measuring roughly 20'x25' (or 500 square feet) on a DIY basis. According to AskTheHandyman.net the average professional is going to require between three and five hours to tackle the work, with costs averaging at roughly $2 per square foot. This will include power washing, labor and all materials - including the treatment of any railings or spindles surrounding the deck. Clearly, it isn't necessary to hire someone to do this job, unless free time is at an absolute minimum.
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The average costs and materials associated with this project include:
(per square foot)
Cost to stain a deck varies greatly by region. Get free estimates from deck, patio and porch contractors in your city.