The precise sequence for restoring weather-beaten mahogany decks

How to Clean and Restain a Deck | This Old House · 3:20 · Video: This Old House · Watch at the source

In short: Watch general contractor Tom Silva demonstrate the professional method for reviving a dirty wood deck. This guide moves beyond simple washing to show how proper preparation prevents future decay.

To restore a mahogany deck, the process begins by pre-wetting the wood with regular water; this ensures that cleaning detergents are not absorbed into the fibers. Once wet, a biodegradable detergent and water mixture is applied via a garden-type pump sprayer, scrubbed with a stiff brush, and rinsed.

A critical preservation step involves applying borate to inhibit future mildew growth before the final finish is applied. The process concludes with a combination of stain and polyurethane to provide both aesthetic color and weather protection.

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