Unfortunately, waterproof decks do not last forever. Typically, a newly renovated deck coating is warranted by the manufacturer for 3 to 5 years. However, that warranty can be extended by the manufacturer as much as another 5 years if the deck is inspected (and repaired or recoated if necessary) on a regular basis. And again, as for roofs, the southern California environment conspires to shorten the unmaintained life of a typical deck coating.
Additional risks that can shorten the life of a waterproof deck include:
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