Garage Concrete Floor cracks

[MrPotatoNew]

Hi there,

Hoping to get some experienced insight.

Just moved into a property that has detached concrete garage on a raised concrete platform. Possible 40 yes old.

I'm trying to get rid of the garage with a new prefabricated concrete garage and almost on stage to lock deal. However, the garage surveyor mentioned the crack on the floor and that it will require a re concrete plaster (hope I mentioned correctly) and quoted £1500 for the layer of concrete alone.

This obviously above me already stretched budget and now I'm double minded.

Has anyone experienced this or has some views. Appreciate any inputs to make up my mind. Pics attached

@MrPotatoNew I would not put a new concrete layer over that. I would expect it to be dug out and repaired with a new section of slab. Could be several things causing it but probably ground shrinkage underneath or the soil under is moving it apart. Could be poor quality concrete. The slab might not be deep enough. I’d ask the surveyor what he thinks caused it and get his remedial work quote in writing.

£1500 on top would make most people stop and think, especially when you’ve already budgeted tight for the new garage.
If the slab is still solid and it’s mainly surface cracking, another option could be laying heavy-duty rubber flooring over it rather than pouring a fresh concrete layer. It’s simpler to sort, gives you good grip, and you’re not stressing about cracks coming back through.
I was actually looking at some options from rubbermatting-direct.co.uk/ recently and they seem to have decent garage-grade stuff, might be worth a look before committing to more concrete.

@richard561 But you would have no idea if it’s cracking underneath!