Painting over dark colours is one of the most common decorating challenges. Deep blues, reds, greens, and greys can easily show through new paint if the job isn’t done properly. The good news is that with the right preparation and technique, you can achieve a clean, even finish without wasting time or paint.
Start with proper surface preparation
Preparation is the most important step. Before any painting begins, the wall needs to be clean, smooth, and stable.
- Wash walls to remove grease, dust, and marks
- Lightly sand glossy or previously silk-painted surfaces so the new paint can grip
Skipping this stage often leads to patchy coverage and poor adhesion.
Use a primer or base coat
When covering dark colours, primer is essential. A quality primer blocks the old colour and prevents it from bleeding through the new paint.
For best results:
- Use a stain-blocking or high-opacity primer
- For very dark colours, a grey or tinted primer often works better than white
- Allow the primer to dry fully before painting
Trying to cover dark paint without primer usually means applying extra coats later, which costs more in the long run.
Choose the right paint
Not all paints cover equally. Cheaper paints often need more coats, especially over dark walls.
- Use high-quality trade paint with good opacity
- Lighter colours may still need two coats even after priming
- Matt finishes hide imperfections better than silk or gloss
If you’re switching from a strong colour to white or a pale shade, expect at least two top coats for a solid finish.
Apply paint correctly
Technique matters as much as materials.
- Cut in neatly around edges before rolling
- Use a medium-pile roller for even coverage
- Apply paint evenly and avoid overworking the wall
- Let each coat dry fully before applying the next
Rushing coats can cause streaks, roller marks, and uneven colour.
Common mistakes to avoid
- Skipping primer to save time
- Applying thick coats instead of multiple thin ones
- Painting over damp or dusty walls
These issues often result in the old colour showing through or a poor-quality finish.
When to call a professional decorator
Painting over dark colours can be time-consuming and frustrating if you don’t have the right tools or experience. Many homeowners start the job themselves and call in help once problems appear.
If you’re searching for decorators near me, The Handy Squad provides professional painters and decorators across London. Whether you’re in east London or south London, our team handles everything from interior painting and wallpaper hanging to repairing plaster walls, fixing ceiling cracks, and painting doors and frames.
For a smooth, long-lasting finish without the stress, you can call your local painter and decorator on 0800 0 12 12 12 or request a free quote through our website.
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