Browse Forums DIY, Home Maintenance & Repair 1 Nov 05, 2010 7:59 pm We have a wall in our ensuite which we have decided to paint rather that tile as is it very uneven and can't be tiled without incurring mess and cost. What do we need to do to prepare the plasterboard/gyprock for painting? There are two boards butted up together and crudely joined with tape and plaster. What do I need to do to even it up so it looks acceptable? Do I need some sort of sealant as an undercoat? Any advice would be great! Thanks! Re: How do you prep plaster for painting?? 2Nov 05, 2010 8:30 pm There are a number of products to join plasterboards Bunnings is good for it check out the builders hardware section for advice on sealants and joiners then off to the paint section for undercoat and paints Re: How do you prep plaster for painting?? 3Nov 05, 2010 8:32 pm Try sanding it to a flat finish first and if you cant achieve this then cover it with more adhesive, then sand again, then undercoat and 2 top coats. Site Start: 10th September, 2010 PCI : Friday 27th January, 2011. Handover: 3rd February, 2011 Build Thread: viewtopic.php?f=31&t=37677 Re: How do you prep plaster for painting?? 4Nov 29, 2010 4:58 pm Make sure you use a proper "sealer" or "primer" on the plasterboard first. Don't just patch and paint, no matter how many coats you intend to give it. I've just had some painting done on some areas that were flaking badly - verdict? - the surface was not sealed prior to painting which is now costing me big time. They took a short cut at the time, but now that paint is on the surface it is bubbling and flaking off and it refuses to 'take' any paint - not much I can really do about it now. Save yourself some worry and take a little extra time to slap a coat of sealer on the surface, especially as the bathroom will already be subject to moisture. Re: How do you prep plaster for painting?? 5Nov 29, 2010 6:30 pm Firstly make sure the join is flat by sliding a paint scraper the whole way along the join. If some parts of the tape are proud (sticking out too far) you will need to cut it out and re tape if necessary. If the wall is painted scratch the parts that you are going to plaster by scraping a flat paint scrapper to help the plaster bind, Keep in mind that you will have to plaster the scratches so just scrape the part that will initially be plastered. If it is only a small join then go to bunnings and get a small bucket of multi purpose plaster (you can sand this if your work is a bit rough) and a appropriate tool to apply the plaster. they should sell cheap plastic tools which I would suggest if you are not intending to do a lot of plastering. Now the fun part, You realistically want to apply two more coats of plaster so start with another coat that fills in the recess gap that the tape is sitting into, wait until dry and sand flat. Now for the last coat, You want about 12 inches for the width, Try to keep it flat and Feather the edges a little bit to make sanding easier. Now sand Flat. Finished Tip: do not leave the plaster days or weeks before sanding Good luck Hi, Have used the Dulux 1 step, oil base on my walls(white set), out of can it’s already a more thinner product than a final coat paint Also in water base Water or… 3 5025 yeah i couldnt picture it issue either, but i could clearly picture what they were doing wrong haha 2 5295 Our 6m high Cathedral ceiling has 0 insulation, just plaster, wrap and tiles as far as I can tell. Wife likes the exposed beams, I hate the $600 per month heating bill,… 0 13488 |