Prefabricated house question

Alright, what U-values should these be? And is there anything else to consider with prefabricated houses?

>0.12 W/m²K. You will regret anything else in 15 years when energy prices rise.

And retrofitting insulation is very expensive, since scaffolding, replastering, and labor time are the most costly parts of insulating. Better to insulate properly right away. The material is dirt cheap (mineral wool 40€/m³), and with new construction, you have installation costs anyway, whether it's 8cm or 25cm insulation! You will recoup the extra material costs through lower heating costs within 5-7 years at current prices! :cool:

Hello,

it generally depends on the building envelope, including the floor slab/basement, collar beam ceiling, roof, windows, front door, etc.

For example, we decided on floor-to-ceiling windows in the children's rooms, bedroom, and many large windows in the living room (southwest). Something like this is, of course, somewhat detrimental to the U-value of the building envelope - but it increases living comfort.

Regards...

I think prefabricated houses are a really good idea. Above all, you can put everything together yourself, even the furnishings :) I once saw a documentary there and have to say that I am also very interested in such a house. Have you already made a decision?

>0.12 W/m²K. Everything else you will regret in 15 years when energy prices rise.

I see it somewhat differently. If the U-value increases, the demand rises! Furthermore, it is a one-sided consideration without taking the overall context into account. For each building, there is an optimal insulation thickness from an economic perspective. In particular, the type of heat generation must be considered. With conventional heat generators, somewhat better insulation is generally required because consumption is higher than demand. With heat pumps, it is the opposite. Not to forget, insulation (HT) only affects the demand/consumption for heating, not for hot water preparation.

best regards