Decks, Patios, Porches and Docks - waterproof a balcony
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vballDrummer
09-17-07, 11:50 AM
I have a 5x20 balcony that has a flat floor. Although it is protected on three sides, the front does receive weather. It is currently OSB that was sprayed with a liquid waterproofer during initial construction. I need to coat (AllDeck?) or tile (porcelain w/ditra?). Should I create a slope using something like furing strips and lay another 3/4 OSB on top? Suggestions for the most permanent finish is requested. adTHANKSvance
dandub01
09-17-07, 01:17 PM
I have a 5x20 balcony that has a flat floor. Although it is protected on three sides, the front does receive weather. It is currently OSB that was sprayed with a liquid waterproofer during initial construction. I need to coat (AllDeck?) or tile (porcelain w/ditra?). Should I create a slope using something like furing strips and lay another 3/4 OSB on top? Suggestions for the most permanent finish is requested. adTHANKSvance
I just topped a 500sft deck with Geco. Looks and works great. You do need to create a slop so a new plywood desk surface would be needed. Dan
I just topped a 500sft deck with Geco. Looks and works great. You do need to create a slop so a new plywood desk surface would be needed. Dan
lefty
09-18-07, 10:11 PM
vballDrummer,
Welcome to DoItYourself.com and the Deck forum.
OSB and water DO NOT MIX!! If you can seal the OSB so that it gets NO water exposure, then you are going to be OK. But, if there is any question, get rid of the OSB and go to (at the VERY least) plywood, or better yet a composite that won't be bothered by exposure to the elements.
If you go walk through a new subdivision under construction and look at what the roofers do, you'll see that they use OSB as an underlayment ONLY inside the exterior walls. Absolutely everything outside of the exterior walls is sheathed with plywood.
Welcome to DoItYourself.com and the Deck forum.
OSB and water DO NOT MIX!! If you can seal the OSB so that it gets NO water exposure, then you are going to be OK. But, if there is any question, get rid of the OSB and go to (at the VERY least) plywood, or better yet a composite that won't be bothered by exposure to the elements.
If you go walk through a new subdivision under construction and look at what the roofers do, you'll see that they use OSB as an underlayment ONLY inside the exterior walls. Absolutely everything outside of the exterior walls is sheathed with plywood.