Pocster Posted August 14, 2020 Share Posted August 14, 2020 Well, I'm nearing the point of tiling the walls. Will use a laser to get my first whole course level i.e. so there's around half a tile height to the floor which goes in last. But when you get to a corner in a bathroom i.e. wet area do you... 1) Leave a 'gap' and fill with grout? (pic 1) 2) Leave a 'gap' and fill with sealant? (pic 1) 3) One tile butt's against the wall and the gap filled with grout? (pic 2) 4) One tile butt's against the wall and the gap filled with sealant? (pic 2) 5) None of the above Link to comment Share on other sites More sharing options...
Onoff Posted August 14, 2020 Share Posted August 14, 2020 If doing mine again, looking at 2) I'd butt the tile going up the page against the tile going across with a credit card thick gap then clear CT1. Did this where my wall tiles meet the floor. You as I understand never want to look at such a corner joint head on. 1 Link to comment Share on other sites More sharing options...
Mr Punter Posted August 14, 2020 Share Posted August 14, 2020 We apply CT1 to the joins in the cement boards. Tile and grout as per (2). Silicone to internal corners. 1 Link to comment Share on other sites More sharing options...
Pocster Posted August 14, 2020 Author Share Posted August 14, 2020 So 2 . But coloured ct1 for this internal corner ( to match grout ) . Link to comment Share on other sites More sharing options...
Onoff Posted August 14, 2020 Share Posted August 14, 2020 What say @Nickfromwales? 1 Link to comment Share on other sites More sharing options...
Mr Punter Posted August 14, 2020 Share Posted August 14, 2020 9 minutes ago, pocster said: So 2 . But coloured ct1 for this internal corner ( to match grout ) . No, silicone. CT1 does not finish well and discolours. 1 Link to comment Share on other sites More sharing options...
Pocster Posted August 14, 2020 Author Share Posted August 14, 2020 1 minute ago, Mr Punter said: No, silicone. CT1 does not finish well and discolours. Ok . So an ‘edge’ of ct1 for pic 2 where the horizontal tile hits the wall . This won’t be visible once the vertical tile is installed . Silicone then on that vertical line . yeah ? ? Link to comment Share on other sites More sharing options...
Mr Punter Posted August 14, 2020 Share Posted August 14, 2020 I like to use CT1 for the joins in the substrate boards - Hardie Backer or whatever. Not as good as proper tanking but for a shower it seems fine. Then just tile, grout and then go over the internals with silicone. 1 Link to comment Share on other sites More sharing options...
nod Posted August 14, 2020 Share Posted August 14, 2020 1 hour ago, pocster said: Well, I'm nearing the point of tiling the walls. Will use a laser to get my first whole course level i.e. so there's around half a tile height to the floor which goes in last. But when you get to a corner in a bathroom i.e. wet area do you... 1) Leave a 'gap' and fill with grout? (pic 1) 2) Leave a 'gap' and fill with sealant? (pic 1) 3) One tile butt's against the wall and the gap filled with grout? (pic 2) 4) One tile butt's against the wall and the gap filled with sealant? (pic 2) 5) None of the above You need to leave a 4 gap clear Of grout in the shower area Then silicon afterwards Some of the builders want these grouted in But I always tell the tilers to leave them clear 1 Link to comment Share on other sites More sharing options...
Pocster Posted August 14, 2020 Author Share Posted August 14, 2020 31 minutes ago, Mr Punter said: I like to use CT1 for the joins in the substrate boards - Hardie Backer or whatever. Not as good as proper tanking but for a shower it seems fine. Then just tile, grout and then go over the internals with silicone. My waterproof system requires using delta seal between all the board joints . Then a water proof paste over joints , tanking strip membrane over that .Then paste again with pre made corner pieces and more tanking strip . Hard to see any leaks getting through that - if installed properly of course ??? 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted August 14, 2020 Share Posted August 14, 2020 7 hours ago, pocster said: My waterproof system requires using delta seal between all the board joints . Then a water proof paste over joints , tanking strip membrane over that .Then paste again with pre made corner pieces and more tanking strip . Hard to see any leaks getting through that - if installed properly of course ??? Link available to this system? Link to comment Share on other sites More sharing options...
Pocster Posted August 15, 2020 Author Share Posted August 15, 2020 11 hours ago, Nickfromwales said: Link available to this system? Www.pcsboard.com Can’t buy direct . I bought a ‘kit’ from my tile supplier ( TileFlair ). I think the kit is only available from TF Link to comment Share on other sites More sharing options...
Pocster Posted September 20, 2020 Author Share Posted September 20, 2020 So! I am now at this stage. For this corner return do I ct1 aswell then simply silicone up the corner on the ct1? - that it? Link to comment Share on other sites More sharing options...
Onoff Posted September 20, 2020 Share Posted September 20, 2020 2 hours ago, pocster said: So! I am now at this stage. For this corner return do I ct1 aswell then simply silicone up the corner on the ct1? - that it? What's that, a big gap? Link to comment Share on other sites More sharing options...
Pocster Posted September 20, 2020 Author Share Posted September 20, 2020 17 minutes ago, Onoff said: What's that, a big gap? It’s only really 3mm or so But fill with ct1 then silicone on top ? Link to comment Share on other sites More sharing options...
bassanclan Posted September 20, 2020 Share Posted September 20, 2020 You can use CT1 instead of silicone. It is very tricky and takes a lot of time to make it look good, but it will stand the test of time, but white discolours and I've had similar with clear before. Link to comment Share on other sites More sharing options...
Pocster Posted September 20, 2020 Author Share Posted September 20, 2020 7 minutes ago, bassanclan said: You can use CT1 instead of silicone. It is very tricky and takes a lot of time to make it look good, but it will stand the test of time, but white discolours and I've had similar with clear before. My plan was ct1 clear in the ‘gap’ then coloured silicone over it Link to comment Share on other sites More sharing options...
Onoff Posted September 20, 2020 Share Posted September 20, 2020 I've just used some BT1, straight in the gap between tile and end of bath. Bead of the same at the wall: 1 Link to comment Share on other sites More sharing options...
Pocster Posted September 20, 2020 Author Share Posted September 20, 2020 (edited) Hmmmm can’t seem to find bt1 grey . Planning on grey grout - might just ct1 grey ontop .... Edited September 20, 2020 by pocster Link to comment Share on other sites More sharing options...
bassanclan Posted September 20, 2020 Share Posted September 20, 2020 https://www.cityplumbing.co.uk/C-Tec-CT1-Grey-Sealant+Construction-Adhesive-290ml/p/991057?uiel=Desktop Grey ct1. Also stocked in a lot of TP or plenty of places online 1 Link to comment Share on other sites More sharing options...
Pocster Posted September 20, 2020 Author Share Posted September 20, 2020 8 minutes ago, bassanclan said: https://www.cityplumbing.co.uk/C-Tec-CT1-Grey-Sealant+Construction-Adhesive-290ml/p/991057?uiel=Desktop Grey ct1. Also stocked in a lot of TP or plenty of places online Sure but no bt1 grey Link to comment Share on other sites More sharing options...
Nickfromwales Posted September 20, 2020 Share Posted September 20, 2020 Do NOT attempt to use CT1 as a finish product. Use silicone. Grout the 3mm gaps and sponge them back so they’re just a little concave. Then silicone. CT1 should only ever be on show when it’s the clear one and around a shower glass, or at the wall / floor junction over a grout. Silicone everywhere else. Mapei do a great range of colours, and NoNonsense from screwies is ok too. Grout in the corners first, now I’m off back upstairs. Keep the noise down. 3 Link to comment Share on other sites More sharing options...
Pocster Posted September 20, 2020 Author Share Posted September 20, 2020 (edited) 15 minutes ago, Nickfromwales said: Do NOT attempt to use CT1 as a finish product. Use silicone. Grout the 3mm gaps and sponge them back so they’re just a little concave. Then silicone. CT1 should only ever be on show when it’s the clear one and around a shower glass, or at the wall / floor junction over a grout. Silicone everywhere else. Mapei do a great range of colours, and NoNonsense from screwies is ok too. Grout in the corners first, now I’m off back upstairs. Keep the noise down. Had no intention of using ct1 as final finish as I’ve said many times ? Surely I should clear ct1 that vertical line ( like on the opposing wall ) but concave; then do silicone ontop . Is that not better ? . Ct1 as real waterproofing . Silicone as nice visual colour 1st defence to water . Grout in corner allows for no flexibility. Surely you’ve finished grouting mummies bedroom by now ? ? Edited September 20, 2020 by pocster Link to comment Share on other sites More sharing options...
Nickfromwales Posted September 20, 2020 Share Posted September 20, 2020 Your momma sure does care about your schooling, Forrest Will you CT1 every other grout line? No. So don’t CT1 those ones. Simples. 1 Link to comment Share on other sites More sharing options...
Onoff Posted September 20, 2020 Share Posted September 20, 2020 29 minutes ago, Nickfromwales said: Do NOT attempt to use CT1 as a finish product. Use silicone. Grout the 3mm gaps and sponge them back so they’re just a little concave. Then silicone. CT1 should only ever be on show when it’s the clear one and around a shower glass, or at the wall / floor junction over a grout. Silicone everywhere else. Mapei do a great range of colours, and NoNonsense from screwies is ok too. Grout in the corners first, now I’m off back upstairs. Keep the noise down. What's wrong with using no grout and just silicone in tile joints? Link to comment Share on other sites More sharing options...
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