Hi i am building a new build bungallow, i have had a builder do foundations and superstructure and now im getting involved with first fix and then fitting out, i have a spark to do wiring and a plasterer th dot and dab and skin, i lent on a fitted sheet of board and it flexed so i ripped it off and found 3 dots in the middle, my question to you very kind people is is this satisfactory work, thanks

just not enough "dots"  on it --should be a dot about everywhere you would have a screw 

you can see the edges where they have gone all round is fine 

 that is why you felt it flexing 

I agree with ScottishJohn. I think one of the posters on here does this for a living so he may respond, Nod I think is the poster.

I have just boarded my kitchen and in the back of my mind I thought that my stud walls are supported at 400mm centres so dot n dabbed accordingly. Not doing a large area and 25kg bag of addy was only £10 so I went over the top. Walls are solid when the addy sets.