Sealing the garage with a concrete floor?

Why is there no filling under the garage?

If you increase the insulation (=XPS?), the driveway height decreases.

What is going on there?!

Why isn't there any fill under the garage?

Because the garage is already built?

Because the garage is already standing?

Oops! That was not conscious until now (or I overlooked it). KlaRa is the absolute expert here on screed/floor construction, whose opinion certainly carries weight - it comes down to the same level.

That actually amounts to a step up to the utility room. Because a layer of insulation is not a problem solver in this case. You are just shifting the problem of the height difference towards the garage entrance. For you, climbing the step will not be a problem. For your car possibly yes.... (jokingly meant). If garage and residential building were planned in connection, then the height problem raises the suspicion of a local planning error! Although it is not so unusual to deliberately introduce such a step between a carport and a residential building. In the case of a closed (meaning: not exposed to weather) garage, on the other hand, it is not. -------------- Regards: KlaRa