Old building built in 1964, new floor construction but how?

Hi,

we are currently renovating an old building from '64 and are just considering what to do with the floor. What do you recommend? At the moment, I have about 14 cm of reinforced concrete and then 3 cm of asphalt screed?

All the heating pipes and the electrical system will also be completely new. I could then lay them in the new floor, right? And maybe even consider underfloor heating? But what do I do with the stairs?

Just for your information: Unfortunately, the house is only partially basemented.

Thanks and best regards

Hello "Strobel". In the situation you described regarding the object, any advice on the construction without personal knowledge of the object would be irresponsible! For a living space that is presumably to be furnished, the aspects of waterproofing as well as thermal insulation must be taken into account. I cannot believe that what is shown in the picture is mastic asphalt! For everything that is to be built according to the state of the art, a construction height is required. We cannot conjure that up – and we do not ignore it either! That means: an on-site inspection by a qualified expert is necessary here in order to achieve a floor construction that meets the requirements! No usable statement can be made on a purely theoretical basis! Regards: KlaRa

Important to know would be: is there still a basement underneath, is it the ground floor or upper floor? In other words: do you need thermal insulation on the floor or can you insulate the basement ceiling from below? Underfloor heating as a renovation system against earth without insulation underneath would be nonsense. If no insulation is required on top and it is actually only 3 cm of cast asphalt, then you could break that out and achieve a total build-up of 4.5 cm with a renovation underfloor heating system. This would include 2.5 cm of insulation and 2 cm of gypsum fiber screed. There are even thinner systems with a metal honeycomb panel, which is poured with leveling compound and reaches about 1 cm build height. But don’t ask me about the price...