Bear Bear 0 Report post Posted January 3, 2014 Hi Guys,My contractor is asking to apply a water proofing membrane to the walls of our toilets.Is this a common practice? I've only heard of water proofing floors so i was wondering if it's necessary.. Share this post Link to post Share on other sites
nicholas 0 Report post Posted January 4, 2014 HDB's only requires waterproofing to be 150mm upturn on the walls from the floor slab.But there are private developments with the requirement that it be up to 1800mm upturn on the walls.Nicholas ChewLiving CultureHDB Licence : HB-09-4186AM: +65 9 1010 636 Share this post Link to post Share on other sites