ᐅ How to Remove Stubborn Tile Adhesive?

Good evening everyone,

After visiting three home improvement stores for advice and still feeling unsure (since I received three different recommendations), I’m hoping to get some tips here.

We have removed tiles from the floor. What remains is the tile adhesive (see photos). Using a 7cm (3-inch) wide chisel hasn’t been very effective because the adhesive is extremely stubborn and doesn’t come off easily. The adhesive is about 3–4mm (0.1–0.15 inch) thick and covers a spacious area of 70m² (750 sq ft). Afterwards, 60m² (645 sq ft) of parquet flooring and 8m² (86 sq ft) of tiles will be installed here.

What would you recommend? Many thanks in advance!

Try a multitool first, then a Hilti.

Sanding.
Definitely avoid chiseling (Hilti...), if you care about your substrate.

As @guckuck2 mentioned, sanding discs are best. There are discs (similar to concrete sanding discs) suitable for these tasks. For the surface, rent a proper machine and don’t forget the dust extraction.

Exactly – sand and vacuum thoroughly. Just a note: old tile adhesives may sometimes contain asbestos.

Thank you all. I’ve also heard about the asbestos. We will definitely wear respiratory protection since the tiles are from 1979.

Regarding the grinding discs: @rick2018 and others, do you have a photo or a link for me showing what they should look like?