Uneven concrete base help

[Gmac2k16]

Hello there. Looking for some advice ref an uneven concrete base. I am replacing an existing shed with a log cabin garage. Chrcking the levels shows they are not level enough for the cabin(the approx concrete area is 10m x 4.5m) and i dont want to expense of having to destroy and rebuild as the cabin only requires 4m x

6m space. The cabin foundation is completely supported from the perimeter bearer logs, unlike a traditional shed. With this in mind I was going to create a level perimeter footprint by cementing and achoring a concrete lintel base on top of the existing uneven base to give the cabin a solid and level footing with a ramp leading up the 65mm slab for entry. Any suggestions or alternative ideas? Many thanks in advance.

[The Natural Philosopher]

sounds pretty much the best plan.

The other possibility is to get cheap concrete paving slabs and lay on a variable depth mortar bed.

Or build a small wooden casting mould with level tops and fill it full of concrete and build up that way.

ramps as before in either case.

[tabbypurr]

or bricks/stones to sit the walls on, if the amount of unevenness is otherwise acceptable.

NT

[Tim Watts]

The OP could use concrete edging strips - like slabs but narrow and long on a mortar bed too.

[Capitol]

IME preservative coated wood with a layer of felt on top is easier to adjust for uneven surfaces. Life expectancy >40 years.

[Gmac2k16]

replying to Tim Watts, Gmac2k16 wrote: Thanks Guys! Lots to consider