Revisions log for question
Can the height of the floor structure with the ventilation ducts and the heating system be 150 mm?

For our new building, the contractor proposes a floor construction of 190 mm.

An independent architect confirmed to us that in the past he had planned and built his floor construction using 150-160 mm. His calculation is as follows:

Concrete floor. 50 mm of insulation, with room for ventilation ducts (50 mm high), supply and return, fresh water and electrics. Filling with perlite filler. 20-30 mm insulation (impact sound). 20 mm for underfloor heating. 45 mm for screed. 15 mm for flooring. Makes a total of 150-160 mm.

Since we are limited to the maximum height of the building, we would like to remove every inch from the floor to add to the height of the room. In our layout, the sewer pipes will not go through the floor, but directly in the drywall floor below or in the basement.

Can you confirm or refute the above floor thickness calculation with your experience?

• floor
• floor thickness