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How to build a waterproof concrete deck over living space?

I would like to build rebuild my front porch about 20' x 9' with a storage room underneath. the porch will have a concrete deck pored over corrugated metal sheets. and the porch is open without a cover.
does anyone know how to spec this the deck has to be 100% waterproof

Thanks

Asked by david reiss
Posted Mon, 12/03/2012 - 13:19
Edited Mon, 12/03/2012 - 14:09

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4 Answers

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1.
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David,
Here's my advice: don't make up the details yourself. And if this is your first time pouring a waterproof concrete deck, get experienced help. You need to hire a contractor who has done this before and who can stand behind his or her work.

You might want to read this GBA thread: Waterproofing concrete slab.

Answered by Martin Holladay, GBA Advisor
Posted Mon, 12/03/2012 - 14:03

2.
Helpful? 0

i didnt want to rely on the contractor do you know anyone with experience in this field who can tell me what specs i need to follow

Answered by david reiss
Posted Mon, 12/03/2012 - 15:34

3.
Helpful? 0

David :

i would suggest you look into the Schutler company products .
I know they have products exactly for this purpose
( but i have no experience whatsoever with what you are doing ..i've only used extensivly their Ditra membrane )

:)

EPDM membrane could be other cheaper option ??

Answered by Jin Kazama
Posted Tue, 12/04/2012 - 00:55

4.
Helpful? 0

David,
If you have never done this, then -- like it or not -- you are going to have to depend on your contractor. Your contractor is the one who will guarantee that the slab is waterproof, and who will stand behind that guarantee with a promise to return if there is a problem.

If your chosen contractor doesn't inspire confidence, then look around for a contractor who you feel you can trust.

Answered by Martin Holladay, GBA Advisor
Posted Tue, 12/04/2012 - 08:05

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