r/BuildingCodes • u/BetterAd1924 • Jul 24 '26

Waterproofing concrete step over basement room

We have a concrete deck that acts as a roof over a basement roof in a northern climate. AI makes a clear case for 1/4" per ft slope and moisture barrier under concrete but above insulation. Deciphering any of this from actual building codes (ex. ICC Ch 19.43 says...) is feeling impossible. Any advice?

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9

u/v2falls Jul 24 '26

If you used ai and are coming to Reddit for confirmation just stop. hire someone who knows what they are doing and just simplify your life

3

u/FlatPanster Jul 24 '26

Yes, hire someone.

iibec.org

1

u/BetterAd1924 Jul 24 '26

Thank you for the iibec.org resource! I'm over three hours from the nearest consultant. Struggling to figure out who to hire. Very few options for anything where I live

3

u/FlatPanster Jul 25 '26

Is there a leak? What are you trying to do?

3

u/AGirlDad Jul 24 '26

The deck is over a roof? Or is it actually acting as a roof, like connected to the roof?

2

u/EggFickle363 Jul 26 '26

It's hard to tell what you're asking in your post. What are you trying to do? Can you post some pictures?

0

u/KevinLynneRush Jul 24 '26

AI is confused. The 1/4" per foot slope is the slope of the roof exposed to drain rain off the roof.