ᐅ Is it possible to lower the floor construction?

Hello, is it possible to lower the floor construction to gain more ceiling height?
My building planner originally designed with standard height hollow brick blocks, and that is still my biggest issue and very frustrating.

My current construction has a total height of 18cm (7 inches): 10mm (0.4 inches) vapor barrier, 70mm (3 inches) thermal insulation with a thermal conductivity of 0.035 W/(m·K), 30mm (1.2 inches) insulation fixing board, 65mm (2.6 inches) cement screed with underfloor heating, and 5mm (0.2 inches) PVC flooring with leveling compound.

I would also like to replace the insulation with a better one, which has a thickness of 60mm (2.4 inches) (Puren PIR MV-SE).

Is this possible overall, how many centimeters of height can be gained, and what costs should be expected?
I assume the biggest challenge will be that doors and stairs may also need to be adjusted?

Do you want to bring such a huge construction project into your home just to gain 2-3cm (1 inch) of extra ceiling height?

Yes, if possible, higher ceiling height, better thermal insulation, and a new floor covering with improved impact sound insulation.
Also, the floor is not even; you can notice it because the chairs wobble.
This is only about the ground floor; the upper floor should remain unchanged.

Marci82 schrieb:

Hello, is it possible to lower the floor construction to gain more room height?

Yes, that is easily possible.
But: Everything old has to be removed. Stairs, doors, the main entrance, walls, etc. all need to be replaced or adjusted accordingly. Then a complete rebuild follows.
After that, you will face the issue that electrical outlets and switches will be at an unusual and uncommon height (for example, 10cm (4 inches) higher than normal).

What exactly is your goal? What do you want to gain? Which area will be modified?

If you hire professionals, costs up to a strong mid five-figure amount are easily possible. This can include vacuum insulation panels up to poured asphalt screed. I would recommend saving about 10cm (4 inches) of height so that you can use new standard doors. And only if the current room height is really poor and you have more than 50,000 available.

And assume that the money you invest there increases the value of the house roughly as much as pretty flowers in the living room.

Money is one thing. You will be living in the shell of the building for several months and then will need to dry the new screed by heating it... so for about 3 weeks you will have humidity levels like in the tropics. After that, you will probably need to replace your furnishings on the upper floor and most likely the floors as well.

How do you plan to manage for a few months without a kitchen?