Remove Mortar from Breeze Block Walls

its the old tile adhesive,

 

I definetrly would not use a hilti on it. Overkill surely. Surely you can just go over it? PVA it first.

Im no tiler hopefully someone else will comment.

 

Not sure about how to remove old tile adhesive. If it was me and I was just replacing those few tiles I get my handy little multitool out.

Sorry I couldn't help you anymore. Hopefully OtherS Will Be Able TO throw A Few Ideas

 

In the pic it looks like other tiles have de bonded themselves.

If not, dampen the tile adhesive, leave to soak in a bit, and it may scrap off.

Also......DON'T use pva

 

Are you looking at tiling the complete room or just replacing those few tiles in the picture that have popped off

Tiles & PVA - NO

 

Good idea about the multi tool!

The reason why I said to use PVA is this is a repair job.

Where I have made repairs in the past I have come back to find tiles on the floor.

I then PVA then they stuck firmly on the second attempt. I wouldn't use PVA going on to a fresh surface.

Just interested why is wrong?

 

Hmm I've just done a little digging, there is a huge debate over using PVA primer.

Not to open can of worms. But it has worked for me and a tiler suggested it.

But now looking maybe its best to look for a recommended sealer. Ask a tile supplier especially if you are going over old surfaces. As they dropped off with me.

 

As you mention tore, plenty of advice against using PVA as a sealer for tiles

Also against many manufacturers instructions

There's always gonna be people that have used PVA and had no problems with tiles falling off
Luck maybe ? But why take a chance

Use the right product for the job, it's not difficult, just a little more expensive than PVA

Look at SBR primer. Looks like PVA but chemically different.
SBR can be used to prime / seal dusty surfaces, brick, concrete and also timber before tiling

 

If you're re-tiling the entire bathroom, a decent cold chisel and lump hammer takes them off reasonably quickly. I'd recommend chiselling off as much of the old adhesive as you can and then fixing some proper backing board for the new tiles.

If just a couple of tiles, chisel off old adhesive, primer with SBR or a SBR-based bonding slurry, then new waterproof adhesive and grout.

 

Here ya go Tore......same principle on walls

 

Can't beat the trusty multitool.

Might be able to get away with an angle grinder though. Let us know if you try it.

 

Grinder will do it.......but you'll have to be bloody careful.

 

That stuff looks like it would scrape off easily if a steamer was used.

Mr. HandyAndy - Really

 

definitely. well worth a buy if you ask me.

 

Boarding over it. Removing all the tlies first though right?

If you boarding over it just dot and dab it. Should be a pretty straight forward job.