![]() ![]() Typically you should be able to start painting within an hour or two, but check the walls before you start.Ī wall needs to be completely dry before you start painting. How Long After Washing a Wall can I Start Painting? It might look good for the very short term, but it won’t be long before paint will start to peel and flake and it will need doing again. Wash and gently sand back walls for a better finish. Yes, but don’t - painting straight over old and dirty walls will leave you with a poorer quality finish that won’t last. Can I Paint Straight Over Old or Dirty Paint? If you do get dark paint on the lighter walls, clean immediately to ensure it doesn't spoil the final result. Use painters tape on the lighter walls to achieve a crisp finish. Once the light coloured walls are dry, cut in with the darker coloured paint to create crisp straight lines. Make sure to complete with as many coats as needed – typically two – before starting on the darker coloured wall(s). Start by painting light coloured walls first. Should I Paint Dark or Light Walls First? Smoother walls will give you a more even better-looking finish, so the preparation, while time-consuming, is well worth doing. Run your fingers over the wall to feel for more subtle rough spots. You shouldn’t need to sand down newly plastered walls, but it's very likely you will need to sand older walls.Ĭheck walls by eye for any rough spots. ![]() This depends on the condition of the walls. This will make sure that surfaces are free from any unwanted elements and provide better adhesion for the paint. Over time walls attract dust, dirt, grease and grime so it is essential that you wash walls before you think of painting. Use a fine grit sandpaper to get a smooth finish (Image credit: Steven Jenkins) Do I Need to Wash Walls Before Painting? To finish brush down and vacuum up any dust. So it's a good idea to sand the whole wall to get a smooth finish. When removing wallpaper, old wallpaper paste residue and bits of old wallpaper can get left on the wall. When dry, fill in any cracks and holes, leave to dry and sand. Once you have removed all the old wallpaper you will need to leave the wall to dry. These are great for removing stubborn wallpaper. Repeat until done.Īlternatively, you can use an electric steam stripper. Soak the wallpaper with a sponge and warm water and use a stripping knife to remove. Start by scoring with a Stanley knife or wallpaper scorer, but be gentle you don’t want to mark the plaster underneath. If the wallpaper is in poor condition – or is a dark colour and you want to paint a light colour over the top – it is best to start removing the wallpaper to prep the wall. If your walls and wallpaper are in good condition there is the option to paint over wallpaper. Make sure to brush down the wall to get rid of dust and debris (Image credit: Steven Jenkins) Preparing Wallpapered Walls For Painting: A Step-by-Step Guide This will produce a lot of dust, so put down dust sheets and clean up with a vacuum. To save time and effort use an electric hand sander if you have one. Get a sanding block and a fine grit sandpaper –180 is good – and sand any filler smooth. When done, smooth down with the end or edge of the knife and leave to dry. Make sure to fill the cracks with plaster by pushing in the filler with the knife from a couple of angles. Use an all purpose filler and a flexible filling knife to apply. The next step is to learn how to patch plaster. Wash down any grease spots with sugar soap and a kitchen scourer and leave to dry. Use a dry paintbrush or hand vacuum to get rid of any debris in cracks or holes that need filling. Get a stiff brush and brush down the wall to get rid of any dust, dirt and cobwebs. Preparing Old Walls For Painting: A Step-by-Step Guide Use a 3-4 inch brush to add in corners and a 9-inch roller to apply to larger areas. A watered-down emulsion known as a mist coat or bare plaster paint will need to be applied when painting new plaster and left to dry. Newly plastered walls are very absorbent so need to be sealed before you can add a top coat. Finally get a stiff hand brush and brush down the wall and hoover up any dust. Look out for any stray plaster edges – usually in corners – and knock off with a scraper and sand down with a fine grit sandpaper. If patchy it probably needs more drying time. A simple tip for checking if the wall is dry is to stand back and see if it is all the same colour. ![]() Check that your newly plastered walls are completely dry and clean. ![]()
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