Garage foundation - strip foundation or just a floor slab?

Hello everyone,
I am not only new to this forum but also quite new to construction and would like to start with the following question:

I want to build a garage 3.5 meters wide, 6.5 meters long, and 3 meters high including a pitched roof.

Now I have been searching the internet for weeks and asking various people about the required foundation, but I am not getting any clear answers. Strip foundation or just a slab? Often it is said that a strip foundation is cheaper because the slab then requires less reinforcement (steel) and can also be thinner.
This advantage of the strip foundation is not clear to me because I have to spend the concrete saved on the slab and significantly more for the strip foundations.
Does a strip foundation provide more frost protection, or is it more load-bearing? So clear question: What advantage does a strip foundation have over a slab? Or is the slab the better choice?
I am grateful for any clarifying tips
Regards
Duke

Hello,

the strip foundation also has the advantage that you can simply pave the ground later. That also saves money.

Best regards
honk0190

What do you want to build your garage from? Ours is the same size – we have placed 8 point foundations – but it is also a wooden garage with 8 supporting posts. We have a shed roof – just under 3 meters in front and 2.2 meters in the back height. If you want to build from stone, you will need at least the strip foundations – a slab is not necessarily required. Advantage of the strip foundation: less concrete = cheaper.

Hello honk 0190

thank you very much for your response. But now comes the thing:

That is exactly my understanding problem.

If I pour a strip foundation all around

I need more concrete than I do for the entire floor slab if it is supposed to be 15-20 cm thick (6.6*3.5) and I assume that the strip foundations are 80 cm deep, 20-30 cm wide and run around the dimensions of the garage.

Regards
Duke

Hello Wastl,
thank you very much for your answer. Yes, I forgot to write that. I want to build with stone, namely a 17.4-meter wall made of calcium silicate bricks. Now there are these two options:
1) a continuous strip foundation with reinforcement, so that under all four walls there is a 30 cm wide foundation that absorbs the forces, and inside a thin approximately 10 cm thick floor slab with light reinforcement. or

2) a thicker approximately 20 cm thick floor slab with corresponding reinforcement on which I set the walls all around (of course with a 10-15 cm distance from the edges).

And here I am not clear about the advantages/disadvantages of the two methods.

I always hear something about a frost skirt with strip foundations. But this is never explained. And am I to understand from this that building on only a floor slab is then frost prone? Or does it get colder in the garage?
As I said, that is not clear to me.
Regards
Duke

Could it be that you are confusing something. The frost skirt is located at the edge of the slab foundation to prevent frost from "creeping" under the house/garage. The deep, continuous strip foundation itself should be a frost skirt. But that's just my layman's opinion.