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Waterproofing flat rooftop deck over living area- best system?

3 years ago
last modified: 3 years ago

New home construction and we have a rooftop deck over kitchen/living space. Currently the deck is flat with raw plywood (it was not sloped by framer). Would like to know what recommendations you have for best waterproofing solution? And if possible can I put tile over it? Willing to consider a standalone finished product too if it is durable and puncture-proof enough to handle furniture on the deck. I've received suggestions for:

  • Gaco Flex
  • Duradek
  • Deck 70 by Universal Protective Coatings
  • Fiberglass base underlayment with torch down of 2 layers of smooth modified bitumen,
  • and 3-layer hot mop.

At this point I am confused and not sure what to go with, so your help and advice based on experience would be much appreciated! :)

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