ᐅ The concrete floor in the shed is uneven.

Hello everyone,
I have a shed measuring 7 x 5 m (23 x 16 ft), but unfortunately the concrete was not finished properly and there are several grooves in the floor.
I have now decided to create a smooth surface on the floor and am considering whether to grind it down or fill it with leveling compound. I’m unsure if I would do a good job grinding it.
Which leveling compound would you recommend? It should be self-leveling and, of course, suitable for outdoor use.

Another issue is that I would have to do the work in two stages, first one half and then the other, because I don’t have space to move things elsewhere.

I would appreciate a quick response.

Why do the grooves bother you? For a garden shed, it’s actually quite good as it is. Otherwise, you might consider applying a coating. It’s expensive but very low-maintenance.

Well, I have machines on casters as well as a large workbench, so it's all quite difficult to move around.
By the way, the grooves are a maximum of 7mm (0.28 inches) deep.

I would have left the floor as it is; for a shed, it’s perfectly fine. However, if it must be done, I would wait for a few days of good weather and then move all the stuff outside into the garden.

Normally, the top layer needs to be removed because it often is not suitable for a mechanical bond, for example with a resin. In our case, it was too "soft" in the garage. So if you want to apply a sealant there, I would definitely sand it and vacuum thoroughly.

For lighter loads, there are leveling compounds available, for example for basements, etc.