I've just put up a PB ceiling in a small bedroom. I was using "Easydrive BZP Fine Thread Drywall 100mm" screws, which I couldn't get fully into the joists (left about 20mm sticking out) so I've now used 5.0 x 90mm multipurpose ZP screws and they've done the job.
I think the problem might have been that I was using twin thread drywall screws which are fine thread whereas to go into joists I should have been using coarse thread. I realized this too late. The screws I've used are zinc plated so I can't see them causing any problems for me but am I right in this assumption or is there some reason that you should only use drywall screws for putting up PB.
It's my first go at putting up a PB ceiling and unfortunately it's not that clever. The ceiling's only 8ft x 6ft so I just needed two 8 x 4 boards. Unfortunately, working on my own, I managed to break one of the boards in half and then I cut some sections of board, forgetting to match to where the joists are. So the result is a bit of a dog's breakfast, with the ceiling now comprised of 9 different sections of PB.
Also, there is a 50mm insulation slab between the PB and the joists (hence the 5 x 90 screws) and it is a sloping ceiling which sort of curves at the top of the slope. Because of these two factors I haven't been able to get a couple of the sections to butt up against each other perfectly, with one side a mm or 1.5mm proud of the other and there's one length of about 20 cm where the PB on one side is about 7 or 8 mm proud of the other side. I'm going to get a pro in to do the plastering and am wondering if he'll be able to mask this without too much trouble. Also, someone told me I should have left a 2 to 3mm gap between sections, which I haven't done - will this be a problem to the plasterer?
I think the problem might have been that I was using twin thread drywall screws which are fine thread whereas to go into joists I should have been using coarse thread. I realized this too late. The screws I've used are zinc plated so I can't see them causing any problems for me but am I right in this assumption or is there some reason that you should only use drywall screws for putting up PB.
It's my first go at putting up a PB ceiling and unfortunately it's not that clever. The ceiling's only 8ft x 6ft so I just needed two 8 x 4 boards. Unfortunately, working on my own, I managed to break one of the boards in half and then I cut some sections of board, forgetting to match to where the joists are. So the result is a bit of a dog's breakfast, with the ceiling now comprised of 9 different sections of PB.
Also, there is a 50mm insulation slab between the PB and the joists (hence the 5 x 90 screws) and it is a sloping ceiling which sort of curves at the top of the slope. Because of these two factors I haven't been able to get a couple of the sections to butt up against each other perfectly, with one side a mm or 1.5mm proud of the other and there's one length of about 20 cm where the PB on one side is about 7 or 8 mm proud of the other side. I'm going to get a pro in to do the plastering and am wondering if he'll be able to mask this without too much trouble. Also, someone told me I should have left a 2 to 3mm gap between sections, which I haven't done - will this be a problem to the plasterer?
