Painting New Plaster – How do I paint on new plaster? If you’ve just had a room plastered and you’re itching to start painting, then read on. This handy guide to painting new plaster will help you avoid the pitfalls and get the immaculate finish you want.
First off, let’s deal with a myth. Many people believe that applying a layer of diluted PVA glue to seal the ‘plaster’ is a must, but professional plasterers and decorators agree that this is a waste of time. It can even lead to a poor paint finish if there are any lumps or inconsistencies in the PVA. We follow the professionals in recommending that you apply our paints directly to the plaster wall. Many conventional and most breathable paints and natural and / or organic paints need to have a first special first layer applied called a ‘mist coat,’ made up of paint diluted with water. This helps the top coat to bind with the plaster, but it’s time consuming and messy.
For most normal painting jobs, where you just need a quality easy to use house paint, that works as well as a modern acrylic, we have a few options for you – but by far the easiest (and top selling) is to use this natural paint here. Available in great colours, tough and washable. Once the plaster has properly dried (usually about 4 weeks) then water thin the paint with around 20% water, and use this as the ‘mist coat’ – this will enable good absorption and adherence to the plaster. After 2-4hours, then you can paint the first of your 2 coats of top coat. Again, just use the same paint – this natural paint Graphenstone Premium would be a great choice.
When choosing a paint for lime plaster breathability is the key. Just one square yard of 5mm-thick lime plaster can contain up to half a litre of water. It can take over six months for the plaster to fully dry, but, if your paint is porous and breathable such as Graphenstone Ecosphere then you can paint much earlier, as the water vapour isn’t sealed in. Have a look at our natural lime paint range for more options. You can still use the Graphenstone Premium over lime, and have access to brighter colours. With all our paints, water thin by 20% to act as the mist coat onto bare plaster.
If you’re painting lime plaster, it’s once again the best choice, as it is both fully breathable and emission-free, meaning there’s no risk of a reaction between the chemicals in the paint and the drying plaster. Once you’ve chosen your paint, make sure you pick the right tools for the job. Since new plaster is a smooth, low-friction surface, a cheap or dilapidated roller can slip and cause an uneven finish. As you’re applying the first coat, you may notice slight blemishes or bumps which weren’t apparent on the raw plaster. If you do find any unsightly ridges or lumps, don’t panic. These can be sanded down with fine sandpaper (make sure you wrap the sandpaper round a plane surface to ensure you get a flush finish), and immediately painted over. If you find any gaps or recesses, these can be filled with wall filler, sanded, then touched up with paint.
No, just water thin the top coat, such as Graphenstone grafclean by 20% – and use this as the mist coat. Once this has dried, then you can use the top emulsion coat as normal.
As above, no, just water thin the top coat, such as Graphenstone grafclean by 20% – and use this as the mist coat. Once this has dried, then you can use the top emulsion coat as normal.
So there you have it: If you’re planning on painting over new plaster, don’t PVA, make sure you save yourself time and effort by using a paint which doesn’t need this solution, and make sure you have the right tools for the job.