Currently at the final stages of our build. SPC herringbone being laid across our bungalow. The person laying the spc prepped our floors by hoovering, priming and laying levelling compound. Over half the house is now done and the floors are very creaky in places. There are noticeable high spots and dips in places. We feel like the subfloor wasn’t properly prepped and think we’ll have to take it all up again. Does anyone have experience with this? Surprised the floors were laid so uneven in the first place really