To make sure you get a smooth, professional finish, examine the surface of the wall for flaking paint, bumps and holes. Use filler for any cracks and holes. Let it dry, sand down the surface and seal with sealant. For flaking paint and bumps use a scraper to even the surface before sanding and sealing.
Can I just paint over old paint?
If your previous paint is satin or gloss it's a good idea to rub the walls down with sandpaper. Use gentle pressure in a circular motion - this will help to create a layer that'll help the paint stick.
Clean your wall thoroughly to remove any dirt or dust by diluting some sugar soap in a bucket of water - read the instructions on the product for exact measurements. Make sure you're dressed for the job and wear gloves and goggles, as sugar soap can be an irritant. Use a large sponge to apply the mixture and work it into the surface. Next, refill your bucket with clean water and wipe the wall clean.
Step two: Mask up!
Once the wall is dry, cover switches, sockets and skirting boards with masking tape. If you're painting it a different colour to the ceiling or adjacent walls, run masking tape along the edges so you get a nice, clean finish. Don't forget to lay down a drop cloth to catch spills and splatters once you begin working.
Step three: How do you properly paint a wall?
Now it's time to start painting. If you're painting over a darker colour use a primer first - we recommend a grey one to make it easier to cover. Stir the paint thoroughly before starting. Apply with a roller in an M or W motion, using a small brush or roller for the edges and corners.
If the wall needs another coat, now's a good time to apply it so it has a chance to dry. Two coats are usually recommended, but check the directions on your paint for guidance.
The paint should be dry to touch in approximately 4 hours, which means you can carefully remove the masking tape and pack away your dustsheets. Clean your brushes and rollers, and show off your new wall to the world!