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I am designing a second floor deck that needs to be waterproof and also have a nice walking surface such as quarry tile. For waterproofing, the recommendation seems to be EPDM. Can anyone make suggestions for the best way to adhere the quarry tile to the EPDM?
David E.
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You cannot sucessfully adhere quarry tile to EPDM.
If there's enough height available, the best solution is a open wood platform floating on top of the EPDM, attached only to the house wall (the rest of the deck sits on the roof.) That way your roof can slope for drainage while the deck is level for comfort.
Otherwise you could add a layer of EPDM decking - it's about 3/16" thick by 48" rolls, glued down to the finished roof. It's a walkable surface and looks like tires.
*OK this is probably not what you are looking for, but let me describe something I just designed for a deck ontop of a garage. I also am doing this for a screened porch over a garage. 1. In lieu of your tile, I actually suggest stamped concrete. I know you are thinking......CONCRETE! Hear me out. Even though the floor/deck joists will have to be beefed up, I think the result will be what you are looking for.Over the deck flooring/joists or what ever you plan to use, attach 5/8" playwood. Over this use two layers of 90# rolled roofing (stagger the joints so that the 36" wide roll over laps the one below it 18") Be sure to turn this material up the side of the house or any adjacent wall approx. 4-5" inches (and under any siding for flashing).Over this I put down a single layer of EPDM membrane and also turned it up the adjacent walls.Over this I poured a 4 inch conc. slab. The slab was reinforced with #4 rebar at 24 inches on center (each way). And like I said earlier...its stamped concrete and looks like tile. It looks awesome. Please keep in mind that the entire assembly must be sloped at least 1/4"-1/2" per foot AWAY from the adjacent walls for drainage. Be aware of where the water will go once it leaves the deck.I know you are thinking "what an overkill" Yes it is, but after 2 years not a drop of moisture underneath has occured. Better to do it right once than have to make two attempts.One final thought. Since you did not mention what was beneath this deck, you might think about making it enclosed space or a screen porch, etc. since the deck is virtually a roof.
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I am designing a second floor deck that needs to be waterproof and also have a nice walking surface such as quarry tile. For waterproofing, the recommendation seems to be EPDM. Can anyone make suggestions for the best way to adhere the quarry tile to the EPDM?
David E.