NCC 2025 Top 6 Changes for Waterproofing (public comment draft)

[@JeremyBenda-b9e]

So for a 4m by 4 m bathroom you need 40mm of fall to a drain?

[@DavidPrevite-WaterproofExpert]

@JeremyBenda-b9e it would be 45mm at a 1:80 gradient

[@josesuarez5716]

Now, how to achieve minimum 200mm slab for fire rating, without having a ridge 1:80 (12.5mm per meter) higher than the empire state building ?

[@DavidPrevite-WaterproofExpert]

time to buy up concrete because when this comes in we are going to need alot more of it to get these projects built

[@GolkurKisel]

Could you expand on this please? I´m not sure I´m following? Much appreciated!

[@ojwilla]

So I guess this solves the before or after screed argument

[@DavidPrevite-WaterproofExpert]

@ojwilla it certainly does (for external areas) unless you are considering a performance based design

[@madirishchef]

Goodbye screeds indeed. 70mm stepdown, about time. Structural falls 1:80-concreters will hate this. I just hope that those responsible for the soon to be revised AS4564 are on the same page.

[@DavidPrevite-WaterproofExpert]

i think it is going to take some time to get alignment on such substantial changes. blacklisting screeds is a big pill to swallow