ᐅ Full-rafter insulation for roofs or insulation on concrete slabs

exto1791 schrieb:

Exactly, we don’t want to use it at all for now.

And of course, additional storage space will still appear for “relatively” little money. But for that exact reason, we want to spend as little money as possible on this topic!

Then I would also keep it as inexpensive as possible and use only the existing basement. As already mentioned, storing items in the attic is inconvenient if you have to go up and down that retractable ladder every time.
In the old house, I eventually cleared out the attic and never put anything back there. Collecting stuff was never my thing, and that finally ended with that decision.
I know several people who get skin rashes just thinking about their pointless, cluttered attics…

exto1791 schrieb:

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

The cost for roof insulation is close to €5,000.

If you hire someone to do it, maybe...

11ant schrieb:

Am I remembering correctly that your heating system was also raised, and that the additional cost mentioned probably only refers to the storage room around it?

The elephant memory works perfectly again!
But I insulated the entire attic...
€800 for insulation batts, €150 for foil, €50 for tape...
Okay, I left out the cases of beer in the calculation...

Golfi90 schrieb:

If you have someone else do it, maybe...

The elephant memory is working perfectly again!
But I insulated the entire attic...
800€ for batt insulation, 150€ for film, 50€ for tape...
Okay, I left out the beer boxes in the calculation...

Yes, exactly, that’s what I meant. I didn’t think you were including your own labor.

But yes, that’s true.

The argument from my general contractor during yesterday’s conversation was:

“We had a case where the homeowner didn’t want full rafter insulation—so only the ceiling was insulated. Then eventually warm air went up through the open retractable attic ladder, met cold air from the roof, and condensation occurred.”

My response was that the homeowner must have opened the attic ladder about 10 times a day—after that, he said nothing more... Probably that was the case!

But honestly: if I open that annoying ladder 10 times a year (probably not even 5 times per year), it seems impossible for condensation to form up there, or is that assumption wrong?

We previously had a single-family house (detached house) with this setup. A telescopic ladder Dolle, insulated, with an uninsulated attic above it and an insulated ceiling between the floors. There was also storage space upstairs, and the boiler was located there. The ladder was used occasionally but not very often. There was no condensation damage—none over more than twenty years. However, items stored upstairs did become damp.

About the price: 40 m² (430 sq ft) with 20 cm (8 inches) insulation between rafters, additional layering, vapor barrier, 2 Velux windows for cold rooms with everything included cost 5,000 euros last year. The windows were the most expensive part 🙄