Making second floor deck waterproof


Old 08-15-05, 06:35 PM
Dhiren Nanavati
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Making second floor deck waterproof

We have a very nice wooden deck on second floor. I would like to waterproof it so that we have a nice flooring ON the deck above and there is no water coming through the deck to the nice patio on the ground floor. What are my options?
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Old 08-18-05, 05:19 PM
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I now of two products on the market, (there may be more) Check out "Underdeck" and "Dry space". Do a google search on them to find out where, etc. Be prepared to spend a few bucks on them.
Old 08-20-05, 03:57 AM
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At one time, at least in my area, fiberglass was the popular choice. About 5 years ago we switched over to the material used in the spray-on truck bed liners. Material can be painted. It's definitely not a single afternoon job since a low mositure content subfloor must be put down and the lower portion of the house siding must be removed so that the bed liner can be sprayed in a manner that acts as flashing. So far it's been remarkably trouble free and has exhibited none of the problems we've had with fiberglass (UV breakdown/cracks). New construction costs are about $12 a sq ft. To come in after the fact runs about $15 to $25 sq ft. The bed liner itself runs about $10.50 sq ft installed by a professional.

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