If the knife is held up towards the 90° mark this will actually start to take the filler off so ensure you stick to a more shallow angle. Likewise, don’t be tempted to apply PVA or similar to bare plaster as a sealer, although some do recommend this! Don't use it. Steel angle bead fixed to external corner. The ivory side of normal plasterboard is a little smoother than the brown side. For any slightly proud joints try and screw in any existing fixings a little more or add some additional fixings to try and pull the board down a bit more. As with the other joints and corners use the jointing knife to remove any over spill and then feather the edge out into the surface of the plasterboard as much as possible as this will save on sanding later down the line. No matter what material you have used, it is advisable to wait at least a week before painting new plaster. Slide a wide stripping knife into one of the cuts and remove the paper. The humidity in kitchens and bathrooms cause water-based paints (emulsions) to soak up the water vapour, which can make them unstable and likely to peel or harbour mould spores. The latest products, when used properly, can create a perfect finish on any surface being painted. All you need to do, is apply a primer and undercoat with a roller to create the best surface. The joint between each piece of drywall is visibly covered with joint compound and drywall tape. Why plaster though..not really necessary. Plastering Walls in a Renovation Ensuring your walls are plaster-ready will save you money when it comes to paying your plasterer. Sometimes it may even take up to a month for the fresh plaster to … Take a fresh piece of fine sandpaper and lightly sand all the walls and any peeling paint. First coat of jointing compound applied to external plasterboard corner. The biggest thing is to make sure you PVA before plastering. Next, mix up some joint filler in the mixing bucket and then using the 1500mm jointing knife, scoop some on the knife and apply it over the joint. Once you have completed all the filling and ensured that all edges are fully feathered leaving no hard edges and also that all joints are fully filled with no visible depressions you now finally get to the decorating stage. Make sure you have the right tools to do a professional job, but take care to choose the right stripping method so you don't damage your surface. Once the second coat has dried the third and final coat is then applied but this time the 300mm jointing knife is used. Always use clean fresh water to mix plaster as any contamination can cause the plaster to go off before you've applied it. What You Need To Know About PVA! Using the 150mm jointing knife, apply joint filler to both sides of the corner making sure you get the filler right into the corner itself and then smooth it out towards the edges. It also drastically reduces the weight of tiles you can use on the wall. After you’re done hanging drywall, and all the joints are taped as well as completed, you need 2 coats of paint to give the wall surface its final appearance. 1. Only a few basic tools are required when filling and decorating plasterboard, these are as follows: The basic process for filling plasterboard joints is to build up several layers with a paper tape layer in between the first and second layers and then feather the edges of each layer in. Also, screw in any proud screw heads so they can be filled. Step 2: Take your flexible filling knife and push filler into the gap until smooth with the wall. The plasterboard does not need to have any PVA applied – you are fine to just apply the plaster direct. Before filling the gap, mix 1 part PVA with 5 parts water and apply to the edges of the old plaster with a soft painting brush. Paints designed to be applied directly to bare plaster are available in DIY stores. 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