leveling a concrete floor

[pac1977]

Hi

I’m going to attempt to level my conservatory floor. It’s not level and is about ½ to 1 inch lower that my kitchen, which it’s attached to. I’ve heard if the layer is to thin it will crack? If anyone could give me any advice on, what’s the best stuff to use? what’s the minimum thickness the layer can be? and how to get it level? I’d be very grateful.

Thanks!
Paul