How to fill a crack in a wall
Cracks in internal walls are a common DIY challenge but easily fixed. Just follow our simple step-by-step guide for help.
Here’s what you need to get started:
- All-purpose filler
- Sandpaper sheets
- Protective floor sheets
Disclaimer: If the crack in your wall is thicker than a 10p coin (3mm), visible internally, externally, and wider at the top than the bottom, you should seek professional help as your house may have subsided.
Step 1: Prepare the area
Start by moving any furniture away from the wall and putting down a protective floor sheet.
Step 2: Filling the gap
Fill the crack in the wall using a filler and a spreader. You can use either a plastic or metal spreader. Push the filler into the crack making sure to spread it evenly along the crack.
Types of fillers:
- Interior filler: A general-purpose filler that comes ready-mixed or as a powder to mix with water
- Fine-surface filler: An extra smooth filler for minor cracks and surface imperfections
- Deep-repair filler: A ready-mixed lightweight filler for holes up to 20mm deep
- Fast-setting filler: This filler sets in 10-20 minutes
- Flexible acrylic fillers: Used for gaps between plaster and woodwork
- Foam filler: Used for large holes or gaps.
Step 3: Finishing touches
For a smooth finish lightly sand; the area with a fine sandpaper once the filler is dry. Then repaint the wall.