Room to room transition... do I have to rip up the old tile? - Tile Advice

[cbarton1992]

DIYer tiling my whole house. Done smaller projects but in this I am concerned about the current use of tile and carpet and the transitions from room to room. Can I “build up” the carpeted areas once the carpet is out so that I do not have to rip up the old tile? I have attached a couple of pics.

 

[Steve6690]

By how much do you need to raise the height of the area that is presently carpeted, and what is the floor constructed with?

 

[cbarton1992]

By how much do you need to raise the height of the area that is presently carpeted, and what is the floor constructed with?

Steve the floor is concrete here in Florida. I am not sure how much I have to come up once the carpet is out. I guess I need to pull up the edge of carpet and measure the drop? Not sure but I’d guess what ever the depth of carpet and padding....
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Steve the floor is concrete here in Florida. I am not sure how much I have to come up once the carpet is out. I guess I need to pull up the edge of carpet and measure the drop? Not sure but I’d guess what ever the depth of carpet and padding....

Just pulled some back. It’s 1/8th inch (3.175mm). The carpet is on top of padding and then directly on concrete.

 

[Steve6690]

You could use something like Mapei Renovation screed (slc) to bring the floor up 3mm but I think that's the limit for it ie you can't lay it thinner.
If it's only a difference of 3mm between the two floor heights I would just use a thicker adhesive bed to lay the tiles on, assuming the existing tiles are not on a ridiculously thick bed.
It's time for some calculations to be done. You will need to know the thickness of the new tiles, the trowel you plan to use and then you can work out how much to raise the floor level by e.g if your new tiles are 10mm thick and you plan to use a 1/2 inch square notch trowel (which gives around a 6mm bed depth) you need to raise the floor level to around 16mm below the top of the existing tiles.

 

[cbarton1992]

You could use something like Mapei Renovation screed (slc) to bring the floor up 3mm but I think that's the limit for it ie you can't lay it thinner.
If it's only a difference of 3mm between the two floor heights I would just use a thicker adhesive bed to lay the tiles on, assuming the existing tiles are not on a ridiculously thick bed.
It's time for some calculations to be done. You will need to know the thickness of the new tiles, the trowel you plan to use and then you can work out how much to raise the floor level by e.g if your new tiles are 10mm thick and you plan to use a 1/2 inch square notch trowel (which gives around a 6mm bed depth) you need to raise the floor level to around 16mm below the top of the existing tiles.

Thanks!!!! Will get going on the calculations.....