8ball Posted June 21, 2019 Share Posted June 21, 2019 I am currently trying to pick out a trowel for some bathroom tiling but I am getting contradicting information about how thick the adhesive needs to be for my tile size which is 600x300x9mm, I will be back buttering the tile so would a 6mm notched trowel be adequate? Never tiled before so wanting to make sure I purchase the correct tools for the job. Cheers guys Link to comment Share on other sites More sharing options...
nod Posted June 21, 2019 Share Posted June 21, 2019 2 hours ago, 8ball said: I am currently trying to pick out a trowel for some bathroom tiling but I am getting contradicting information about how thick the adhesive needs to be for my tile size which is 600x300x9mm, I will be back buttering the tile so would a 6mm notched trowel be adequate? Never tiled before so wanting to make sure I purchase the correct tools for the job. Cheers guys You normally go the thickness of the tile So 8 or 10 mil Always back butter floor tiles But not that important for walls If your walls are flat If you do bb use the smooth edge of the trowel Couple of mil is fine Always bag mix 1 Link to comment Share on other sites More sharing options...
Conor Posted June 21, 2019 Share Posted June 21, 2019 I used 12mm for similar tiles on to concrete floor.. a tad too deep. 10 or 8mm would be better. 1 Link to comment Share on other sites More sharing options...
8ball Posted June 21, 2019 Author Share Posted June 21, 2019 1 hour ago, nod said: You normally go the thickness of the tile So 8 or 10 mil Always back butter floor tiles But not that important for walls If your walls are flat If you do bb use the smooth edge of the trowel Couple of mil is fine Always bag mix So if I got a 6mm notched trowel and applied 6mm to wall and then BB'd the tile another 6mm that would be a total of 12mm of adhesive so should be OK yes? Link to comment Share on other sites More sharing options...
PeterW Posted June 21, 2019 Share Posted June 21, 2019 7 minutes ago, 8ball said: So if I got a 6mm notched trowel and applied 6mm to wall and then BB'd the tile another 6mm that would be a total of 12mm of adhesive so should be OK yes? It will end up at 8mm most. A 6mm trowel leaves 6mm grooves. If you butter and groove then back, you’ll get a bit of build but not 12mm. 1 Link to comment Share on other sites More sharing options...
8ball Posted June 21, 2019 Author Share Posted June 21, 2019 6 minutes ago, PeterW said: It will end up at 8mm most. A 6mm trowel leaves 6mm grooves. If you butter and groove then back, you’ll get a bit of build but not 12mm. Really sorry but so new to this so if I'm being a bit dumb then please forgive me, I don't understand how I would only get about 8mm if I apply 6mm of adhesive to the wall and 6mm of adhesive to the tile back. Link to comment Share on other sites More sharing options...
PeterW Posted June 21, 2019 Share Posted June 21, 2019 Because a 6mm trowel is a comb. If you apply correctly, you will get 6mmx6mm adhesive stripes separated by 6mmx6mm voids. Same on the floor means you won’t get a 12mm bed as the adhesive on the tile will fill the voids on the floor .... or near enough ... 1 Link to comment Share on other sites More sharing options...
8ball Posted June 21, 2019 Author Share Posted June 21, 2019 40 minutes ago, PeterW said: Because a 6mm trowel is a comb. If you apply correctly, you will get 6mmx6mm adhesive stripes separated by 6mmx6mm voids. Same on the floor means you won’t get a 12mm bed as the adhesive on the tile will fill the voids on the floor .... or near enough ... Ah I see thanks for explaining Link to comment Share on other sites More sharing options...
bassanclan Posted June 21, 2019 Share Posted June 21, 2019 You don't "comb" the back of the tile usually, just smooth across the back of the tile with the flat side of the trowel to fill all the indentations and ensure full adhesive contact 1 Link to comment Share on other sites More sharing options...
nod Posted June 21, 2019 Share Posted June 21, 2019 6 hours ago, 8ball said: So if I got a 6mm notched trowel and applied 6mm to wall and then BB'd the tile another 6mm that would be a total of 12mm of adhesive so should be OK yes? For wall tiling there’s not much need for bb with the exception of heavy tiles such as limestone The bb is to make sure there is full contact Floors can be a disaster If you use a bag adhesive for walls Nothing will shift them Especially direct onto PB If you use two 6 mild Yiur tiles will slide As I say don’t use the inch side to BB It sort of defeats the object 1 Link to comment Share on other sites More sharing options...
Pocster Posted June 22, 2019 Share Posted June 22, 2019 Dumb question and just a thought . Could you not comb the floor with adhesive. Then comb the back of the tile offset ? I.e so tile adhesive interlocks the gaps in floor adhesive... Or is that plain dumb ? ? Link to comment Share on other sites More sharing options...
nod Posted June 22, 2019 Share Posted June 22, 2019 Not a dumb Question Ive employed tilers particularly younger ones That have combed the backs of floor tiles The idea is to get as much contact as possible A smooth thin layer will do this 2 Link to comment Share on other sites More sharing options...
8ball Posted June 22, 2019 Author Share Posted June 22, 2019 Thanks for the replies and information guys, as always buildhub users to the rescue ? ? Link to comment Share on other sites More sharing options...
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