Removing edge tiles with UFH

[Timo]

So you're tiling the extension? Are you joining onto the existing tiles?

Yes, that is the job I'm looking at. About 10m2 of extension joining into the existing tiles (with the same tiles - which they already have).

The screed (for the extension) was only poured 2 weeks ago so the job wouldn't start till December. And in the meantime I've asked to do some trial tile cutting to see if the approach with scoring the tiles and then chipping them out is feasible ... will report back on that asap.

 

[beanz]

How are you planning on dealing with the movement, between the two slabs?

 

[Timo]

How are you planning on dealing with the movement, between the two slabs?

i was planning on just using flexible ashesive. No? What other solution would you suggest?

 

[beanz]

You really need an expansion gap along the join. I can't think of another way you can do it, without the tiles cracking..

 

[J Sid]

Expansion joint is a must or you will be back to lift the tiles over the two different areas sooner than you think. Not always the most attractive things, but a must in this situation.

 

[Timo]

Expansion joint is a must or you will be back to lift the tiles over the two different areas sooner than you think. Not always the most attractive things, but a must in this situation.

the join between the slabs was right where the grout /join between the tiles is going to be. So wouldnt flexible grout and adhesive be enough?

 

[Ian]

the join between the slabs was right where the grout /join between the tiles is going to be. So wouldnt flexible grout and adhesive be enough?

If the join falls directly over a grout joint, use a coloured Silicon in that joint, that matches the grout, it will be almost invisible.

 

[J Sid]

Yes, if joint falls 'under' grout line use colour match silicon to full depth of tile and adhesive ( down to screed) will be fine. Masking tape either side of joint will give a good finish.

 

[Timo]

If the join falls directly over a grout joint, use a coloured Silicon in that joint, that matches the grout, it will be almost invisible.

great idea!

 

[Timo]

Yes, if joint falls 'under' grout line use colour match silicon to full depth of tile and adhesive ( down to screed) will be fine. Masking tape either side of joint will give a good finish.

I didnt measure it precisely along the full length of the existing versus new slab but it was going to be +/- 10mm of the new full tile edges (lucky!). So I will use silicon as suggested and then just not use adhesive for the 10mm of each tile that may cross over the junction.

Am going back tomorrow to test cut out one of the tiles ... will post an update.

 

[Timo]

Ok, so I went today to lift a tile using the "cut and chisel" technique and it was so easy I ended up lifting the 6 tiles that were needed. First I just cut a 1" grid with the circular saw set to a depth of about 8mm (the tiles are 10mm thick). Half the squares just popped away from the adhesive themselves and the rest came out easily with a sideways tap with a hammer. No chisel required.

Checked the UFH along the way and it was fine.

So now the challenge is to get the adhesive up!

Apparently a sparky is going there soon to fit some lights so the owner will get them to connect the existing UFH up and use their multimeter to (hopefully) detect where the UFH wires run. He has some proximity sensor to detect live wires apparently. No idea? Fingers crossed it can detect the 240V AC through the adhesive. And then he'll just mark along the adhesive where the wires are and I'd chisel around them.

Any other ideas?

 

[Mr Tiler]

if that can actually be done with prescision I think that's the best bet lol

 

[J Sid]

No need to take up adhesive, grind the back of the tile away a couple of mm if only 6 tiles. Then put thin bed of old adh when relaying, remember clean and back butter the ground tile ( will be dusty ) when laying them.

 

[Timo]

No need to take up adhesive, grind the back of the tile away a couple of mm if only 6 tiles. Then put thin bed of old adh when relaying, remember clean and back butter the ground tile ( will be dusty ) when laying them.

Good idea! Will still see what the sparky finds though ...

 

[Mr Tiler]

why did these tiles actually have to come up anyway mate?