Are small height differences between beam and block in floor problematic?

[AFT4B]

We have had to install a beam and block floor throughout the whole house on the ground floor. Despite having spread sand and cement slurry across it, in some areas the blocks sit about 1-2mm lower than the beams. Bearing in mind we have to lay PIR and screed - should I be worried about the insulation not being completely supported underneath?

In areas there is build up from cement/ materials used to do other jobs - which is quite hard to remove. Should I try to remove this or not worry about it?

 

[noseall]

We have had to install a beam and block floor throughout the whole house on the ground floor. Despite having spread sand and cement slurry across it, in some areas the blocks sit about 1-2mm lower than the beams. Bearing in mind we have to lay PIR and screed - should I be worried about the insulation not being completely supported underneath?

Minor discrepancies are not an issue no. Something as simple as building sand scattered about and packed in the hollows is all you need if you are concerned How much room do you have left for insulation and screed?

 

[AFT4B]

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[AFT4B]

Minor discrepancies are not an issue no. Something as simple as building sand scattered about and packed in the hollows is all you need if you are concerned How much room do you have left for insulation and screed?

Thanks @noseall

It's about 140mm to damp for insulation and liquid screed. Not ideal as I wanted thicker insulation but having to retro fit the floor into the existing house has meant we've just had to make things work.

I feel like I'm over thinking it but if the PIR was 100mm would having these voids cause 40mm screed to crack?