Full rafter insulation roof or insulation on concrete slab

Exactly, we don’t want to use it for now anyway. And of course, additional storage space will still emerge for "relatively" little money. But precisely for this reason, we want to spend as little money as possible on this topic!

Then I would keep it as cheap as possible and use only the existing basement. As already mentioned, storing things in the attic is inconvenient if you have to go up and down that pull-down ladder every time. In the old house, I eventually cleared out the attic and never put anything back there. Collecting was never really my thing anyway and with that I finally got rid of the last tendencies. I know some people who get a rash just thinking about their senselessly cluttered attic.....

Insulating the roof doesn't cost just 1,000€ - if that's what you mean!

The costs for roof insulation are around 5,000€

If you have it done maybe...

Am I remembering correctly that with you the HAR was also rerouted, and the mentioned extra cost probably only refers to the storage room around it?

The elephant memory is working wonderfully again!
But I insulated the entire attic...
800€ insulation batts, 150€ foil, 50€ adhesive tape...
Okay, I left out the boxes of beer in the calculation...

If you let someone do it maybe...

The elephant memory is working wonderfully again!
But I insulated the entire attic...
800€ insulation fleece, 150€ foil, 50€ tape...
Okay, I didn't include the boxes of beer in the calculation...

Yes exactly, that's what I meant. Didn't think you counted your own work

But yes, that's true.

The argument from my general contractor in yesterday's conversation was:

"We had a case where the client also didn't want full rafter insulation - so only the ceiling was insulated - then eventually the warm air went up through the open pull-down staircase - collided with the cold air from the roof and then there was condensation."

Then my argument was that the client probably opened his pull-down staircase 10 times a day - after that he said nothing... Probably that was the case!

But honestly: If I open this stupid staircase 10 times a year (probably not even 5 times a year), then it's impossible for condensation to form up there or is this thesis wrong?

We previously had a REH with this configuration. Insulated Dolle retractable staircase, with an uninsulated attic above, insulated floor ceiling. There was also storage space upstairs, and the boiler was up there. The staircase was thus used occasionally. But of course not very often. There was no condensation damage. Not over twenty years. But materials stored upstairs became damp.

About the price: 40 sqm with 20 cm insulation between rafters, layering, vapor barrier, 2 Velux windows for cold rooms with all the bells and whistles 5k€ last year. The windows were the most expensive :rolleyes: