ive put my ceilings up, and now i got the plasterer in skimming away. i noticed that where the plasterboards join onto one another, on some of them there are some major gaps, and hes just put scrim tape over them. hes not filled in the gaps, should he be filling in the gaps with bonding or something and then putting scrim tape over the joins??? whats the consequences of not filling in the gaps and just scrim taping??