Which foundation will be the most stable?

[BSOD]

I probably would have gone with albabalks, 400mm or 600mm height feels more appropriate than several loose 19cm lecabalks.

Or built with skalblock and cast a foundation wall.

 

[Karrock]

Well, I believe that the insulation will remain since the house was placed on the slab sometime during the 70s.

New info, well that sounds promising.

 

[Einh]

Ok. But you don't know if the glass wool stays on the slab when the house is lifted. I wouldn't want to crawl around under a hanging house trying to put back and reattach the insulation with foundation boards.
Moving small houses is a reasonable routine thing. Changing the type of foundation from slab to piers requires a bit more knowledge than you currently have. You seem focused (fixated?) on finding used concrete blocks to place the house on. All houses with slab-on-ground foundations are laid on EPS or XPS insulation with strength from 80-300. It holds and is easy to work with. If you lay a spread layer of XPS, then the house should sit nicely.

Are you suggesting that I should lay out XPS/EPS directly on the gravel and place the house on it? The reason I don't want to pour is that I don't have the time and in the future, I want to be able to install water and sewage, which is easier to do if you have a crawl space/pier foundation. The reason I don't have time to pour is that the owner of the house wants it removed by spring. He's going to build something else on the slab instead. The house is free if I arrange the transportation from there.

 

[Einh]

I would probably go with albabalkar, 400mm or 600mm height feels more right than a number of loose 19cm lecabalkar.

Or built with skalblock and poured up a foundation wall.

Don't albabalkar have a spolkant? Don't they feel more wobbly than lecabalkar which lie steadily and can't tip in any direction?

 

[BSOD]

Albabalks have a flange, don't they? Don't they feel more fragile than concrete beams that lie stable and can't tip in any direction?

They are 25cm wide, 6cm wider than the concrete beam. I don't know in what situation they would tip, they are quite stable. Once you put a house on top of them, they definitely don't move.

 

[Karrock]

Do you mean that I should lay xps/eps directly on the gravel and place the house on it? The reason I don't want to pour concrete is that I don't have time and in the future, I want to be able to bring in water and sewage, which is easier to do if you have a crawl space/pile foundation. The reason I don't have time to pour concrete is that the owner of the house wants it removed by spring. He's planning to build something else on the slab instead. The house is free if I arrange the transport from there.

Aha!
Sounds like a good deal anyway. Do you have space to place the house on joists beside it and pour a foundation with water and sewage at your own pace?

Otherwise, probably the three long lines in any material are still best. Or go up to four lines. But consider where you want to crawl with sewage pipes in hand and try to plan not to place the lines just there.