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Tips for sealing underside of redwood deck

Build scaffolding for structure that's high off the ground

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Q: We have just sandblasted the underside of our redwood deck to remove all of the paint the previous owner used. We now want to seal and preserve it so it won't have to be done again for 10 years. The deck is on the east side of Lake Tahoe with full sun on the top. It is about 30 feet off the ground and the underside gets no direct sun. Moisture is a problem due to snowmelt. We don't want to stain or paint because of the time and expense. The cost for labor alone is more than $700 for one coat only. We want a "once and done" solution. What would you recommend? A: Job one is to protect the wood. If you think regular maintenance is expensive, imagine the price of replacing a redwood or cedar deck that's 30 feet off the ground. It's true that you won't have to seal the underside as often as the top, but 10 years is pushing the envelope. There isn't a product out there that will hold up for a decade of Sierra weather. Best case, you can expect to reseal the undersid...