Browse Forums Bathrooms and Laundry Re: Shower pre-slope or not? 7Nov 12, 2010 9:09 am Where you are coming from is where you are going to... Re: Shower pre-slope or not? 9Dec 15, 2010 11:21 pm Hi there, Forgive my ignorance - I'm new to renovating and attempting my first shower/bathroom. Completely re-tiling it, including pulling out mortar bed and relaying it. I'm still unsure as to whether the waterproofing should go on before or after my mortar bed. The James Hardie pdfs seem to advocate before (http://www.jameshardie.com.au/home/asset?file=file/WetAreaConstruction0906.pdf), whereas it seems to make more sense if it goes on after, so that the mortar bed has no chance of ever getting wet. I've found info on the net supporting both methods, but more commonly putting the mortar bed on top of the waterproofing. There must be a good reason for this? What do the professionals do? I'm still confused. Please help. Re: Shower pre-slope or not? 10Dec 16, 2010 2:14 pm oliwally Hi there, I'm still unsure as to whether the waterproofing should go on before or after my mortar bed. Hi There, After doing a fair bit of research and acquiring the current Australian Standards, it seems that (assuming you are using a class III membrane) either way is acceptable. As for what the professionals are doing, well, I've spoken to several now and they weren't even aware that there were any clear guidelines on how to waterproof a wet area - that made me feel less than comfortable! What I'm doing is laying a pre-slope screed (my concrete house slab was VERY uneven, so I thought I might as well slope it a bit), then I'm waterproofing up from that. Over that I am laying a tile bed screed, on which I will lay tile adhesive, tiles, grout and then grout sealant. If I didn't have to rip out the lower mortar bed originally (because of the ** work done prior), then I would have opted for the waterproofing membrane to be applied at the tile level and save myself a little time. - Side note: That stuff on the James Hardie information is almost a direct excerpt from the current relevant Australian Standards. Have fun! Re: Shower pre-slope or not? 11Dec 18, 2010 1:16 pm Thanks for your help mdelbridge. In my situation I think I'll but my mortar bed down on top of the existing concrete slab, and then waterproof at tile level as you suggested. Just seems to make more sense. Although, as far as I know, I'll have to use some special tile adhesive to stick to the waterproofing. But I'll need that for the walls anyway... Thanks again. Does anyone else have more wisdom on pre- or post-mortar bed waterproofing? A survey must’ve completed by a certified surveyor. This form part of every DA requirement 3 226482 Need advice on the backyard plan above. Should I excavate and cut all of the dirt to level with the house slab or semi-excavate as per photo above? Both left and right… 0 25764 Hi All, We have recently purchased a sloping block (3.5m fall building envelope, 6m overall). Just wondering if you know of any good builders that you would recommend for… 0 2811 |