ᐅ Screed installation in the attic – ceiling between attic and living space

NeulingXX schrieb:

Is it then advisable to insulate under the screed?

You can do that. This way, the pipes are not embedded directly in the screed. But as I said, is your entire house insulated? Like a refrigerator. If you add an extra compartment inside, it still doesn’t change the temperature inside the whole unit.

SaniererNRW123 schrieb:

You can do that. This way, the pipes are not embedded directly in the screed. But as I said, your entire house is insulated like a fridge. Even if you add an extra compartment there, the overall temperature inside the whole unit won’t change.

My question is whether I will lose too much heat in winter because I am heating the storage.

NeulingXX schrieb:

My question is whether I lose too much heat in winter by heating the attic.

If the €30 heating costs per year are too much for you, then you have to completely exclude the attic from the equation. That means properly insulating the ceiling—I would use 30cm (12 inches) of insulation. However, then the attic will probably get cold over time and maybe even damp...

I wouldn’t do that. I would put a few centimeters of insulation under the screed to protect the pipes and conduits. Do you even have enough room to build up the floor structure properly?

NeulingXX schrieb:

My question is whether I’ll lose too much heat in winter because I’m heating the attic.

You’re probably thinking about old houses where the attic is freezing cold and the heat from the upper floor escapes. But that’s not the case here. You will lose some heat from the upper floor into the attic, but only a little from the attic to the outside. Your attic is inside the building envelope, if I understand the original post correctly.

SaniererNRW123 schrieb:

If the 30€ heating cost per year is too much for you, then you have to completely exclude the attic from the equation. So, properly insulate the ceiling – I would go for about 30cm (12 inches) of insulation. But then the attic will probably get cold at some point and maybe even damp…

I wouldn’t do it. I would put a few centimeters of insulation under the screed to protect the pipes and ducts. Do you even have enough space to properly build up the floor structure?

About 18cm (7 inches) is no problem for the floor structure; there is enough space.

WilderSueden schrieb:

You are probably thinking of grandma’s house where the attic is freezing cold and the heat from the upper floor is lost. But that’s not the case here. You do lose some heat from the upper floor to the attic, but only a little from the attic to the outside. After all, the attic is within the thermal envelope if I understand the original post correctly.

Yes, exactly, the roof is insulated.
From what I understand now, it seems better without thick insulation.