Correct construction of garage floor?

Thank you. So the underfloor heating is not necessary, so that’s out. And the rest sounds good. Actually, I had thought about it that way too. Until I heard that you can’t get the 10 or 15 cm thick concrete layer (the slab) as smooth as screed concrete. That’s why the screed layer is supposed to go on top...

It’s not necessary. We also skipped the screed in the laundry room; you can get the concrete quite smooth. You just need to measure the heights properly beforehand and set up wood strips for screeding. A vibratory bottle is also invaluable. That way, we poured about 40 square meters of concrete and then tiled it—without problems.

Morning

I consider a gas heater to be the worst of all options.
Noisy, the exhaust gas remains in the room and thus also large amounts of moisture.

If there is already a water-based heating system in the room, the cost for a few meters of underfloor heating pipe is no longer worth mentioning.

Olli

The heating would indeed be in the adjoining room. However, I still have two XXL radiators (quite massive) left over. I will install them instead of the underfloor heating.

So. I spoke with the first screed installer. His suggestion:

12cm base (treated on top with some kind of hard grain)
5cm XPS
Foil / roofing felt

The next one is scheduled for Monday. Let's see what he says...

A low-end solution would be enough for me. Level the floor a bit if necessary and lay plastic PVC panels where the cars are parked and in the workshop area. When it gets cold: gas burner heating. Of course, it is better as suggested by Olli.

Same opinion! I have been using PVC panels for my garage floor for years without any problems

Same opinion! I have been using PVC plates for my garage floor for years without any problems

Hello Mr. Neubauer,
Three years ago we sealed our garage floor with a resin coating. Unfortunately, tire marks are visible in the spot where the car always stands. Do you have the same problem with the plates? I can’t imagine how the plates are supposed to protect the floor. Doesn’t water get through the joint? Our concrete floor is C25/30.

Hello Mr. Neubauer, Three years ago we sealed our garage floor with a resin coating. Unfortunately, the spot where the car always stands shows tire marks. Do you have the same problem with the tiles? I can't imagine how the tiles are supposed to protect the floor. Doesn't water penetrate through the joint? Our concrete floor is C25/30.

We often park 1 motorcycle and 2 cars permanently in the garage. For more than a year now, no marks are visible. However, the coating gives a very stable impression. Caution! According to the craftsman, the coating must absolutely be glued because otherwise water will penetrate through the loose joint. We received a total of 3 quotes from 4 companies for our 50 sqm garage. From €1500.00 up to €6000.00!? So it pays to compare!