Extension, on what foundation?

[zingo]

I have a split-level house and would like to expand it (+20 sqm on two floors).
So, I need to complement an existing slab.
I can choose to make it of concrete or with a crawl space. A concrete slab requires concrete trucks and a lot of concrete. I imagine it will be expensive. I would prefer to do all the work myself and assume that the crawl space is more appropriate then. But how suitable is it to complement a concrete slab with a crawl space?

 

[Gabbe1]

I would absolutely recommend a slab on grade.
That's what we did when we extended our suteränghus.
More info can be found here: http://www.byggahus.se/forum/socialt-projekt/139006-utbyggnad-i-mariestad.html

 

[zingo]

Nice... but why do you recommend the plattan?
Doesn't it become much more expensive in many ways if you're used to "doing everything yourself"?

 

[Mats]

It will probably be a bit more expensive, but you avoid the moisture risks that crawl spaces have.

 

[hokanp]

Clearly slab on ground. You get rid of all the problems that come with a crawl space foundation.