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Question:

Drywall / Plasterboard. I have just put up a plaster board ceiling and noticed that i put the sheets upside?

down. The writing on the back says that i cannot plaster on the side that now faces the floor. What can i do. I have fitted recessed spotlights and now need to make good the surface, ie plaster ready for painting. Can i still do so after maybe pva'ing / bonding the surface?

Answer:

Easiest solution would be to go over the ceiling with 1/4 drywall. That won't affect the depth of the cans too much. However, you will need to use adhesive, such as Liquid Nails, along with the drywall screws to hold the sheet up. The 1/4 will have too much flex to span the distance between the joists. There are also screws you can use to help hold it up. The technical name is laminating drywall screws, but we call them rock-to-rock screws. Good luck.
May 11, 2017
I agree with Woodtick. Use coarse thread drywall screws on the ceiling trusses/joists and rock to rock screws in the field. I hate hanging lids; no sense adding the weight and mess of liquid nails. You should be alright on the lights, the springs that hold the finish ring usually have a little play.
May 11, 2017
if you are on the backside of drywall, and not taped yet, prime first with regular Kilz , not water based, then procede to mud and tape and float out all your seams. the primer prevents the mud or a paint finish from bubbling the paper,
May 11, 2017
Just seal with PVA 5:1and add the same to the finish mix
May 11, 2017
you really got it wrong ..you dont normally do the lights until after you plaster ..get some 3/8 boards and long nails and overboard ..removing lights first ..measure light positions and refit after plastering
May 11, 2017

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