well i managed to screed the floors yesterday (using sika self level latex) well i know i've got a point through the centre of the roon slightly higher than the floors both sides of this, it's where the old dividing wall used to be so the floors were ramped up to it, so i latexed the back half of the floor as this was very uneven but could not latex to the centre level as this would raise the floor by about 25 to 30 mm in kitchen doorway, now i know the floor is level left to right but ramped down towards the kitchen (i extended this ramp with the screed) i've got flex in the joints on 2 or 3 of the boards towards the peak of the ramp ( around 4-5mm flex) is this an acceptable amount of flex for click fit laminate? must say i've got 6mm fibreboard underlay under the floor as well cheers all