Tiles directly on concrete hollow block? Sanitation mill for plaster?

[Sam_u_El]

Hi,

I have torn down a framed construction (insulation, wooden studs) on the basement wall and ended up removing most of the plaster with it. The wall will be tiled when we are done. Does the entire wall need to be replastered, or can I remove the remaining plaster and tile directly on the concrete block?

Possibly part of the wall will be in the shower corner, and I will probably apply a waterproof membrane if so. Can this be done directly on the concrete block, or is plaster required?

Other parts of the space where the plaster is intact have previously been painted/wallpapered, and I plan to use a renovation grinder to remove this to bare plaster. Is this the right tool to use?

Is the renovation grinder also suitable for removing the remaining plaster?

/Samuel

 

[Roundup]

A renovation cutter (with a proper dust separator/vacuum cleaner) is probably the best way to remove paint from plaster. It can also be used to remove irregularities and small areas of plaster (around a few square decimeters).

To clean an entire wall of plaster, it is better to use a small demolition hammer or rotary hammer with a chiseling function and equip it with a wide flat chisel. It would take forever just to scrape off a couple of centimeters of plaster layer on an entire wall over several square meters.

Furthermore, I think tiling is similar to painting, meaning the final result depends on the preparation work. If you try to tile an uneven wall, it will probably turn out quite poorly. A simple way to get an even surface for the tiles would be to smooth it out with plaster first.

 

[Sam_u_El]

The concrete block wall is very straight and even, so in that regard it should be fine. I was more concerned about how the waterproofing layer and/or tile adhesive adheres to the stone. Does anyone know if that is an issue?

 

[b8q]

I guess that if you just apply primer first, it will be fine, but to be sure, you can ask at, e.g., the tile store where you bought tiles, adhesive, etc.

 

[Sam_u_El]

Anyone who has tried primer and tiles directly on concrete blocks and wants to share their experiences?

 

[Sam_u_El]

Feedback. It's now been just over two years since tiling directly on concrete breeze blocks, and it's still holding up beautifully.

 

[Sam_u_El]

Feedback again. Now it's been almost another 6 years, so a total of about 8 years. Still sits perfectly.