How long will the effect from the deck cleaning last?
How long your wood deck can look clean will depend on the amount of traffic/use it gets and the location of your house (woody areas promote the growth of mold and mildew). But perhaps the most important factor will be whether or not your deck was treated with a waterproof sealer or stain after the pressure cleaning was done. Such sealers will protect your wood deck from the moisture and elements, prohibit the growth of unattractive mold and mildew and will prevent dirty stains from penetrating deep into the wood (clear sealers will last for a year, while pigmented ones will hold up to 5 years).
