Painting a wall is one of the most cost-effective DIY projects with the biggest visual impact. Painting a 12 m² wall costs €15 to €50 in materials. A decorator charges €80 to €200 for the same wall.
What Does Painting a Wall Cost? DIY vs. Decorator
| DIY (materials) | Decorator (materials + labour) | |
|---|---|---|
| Emulsion per wall (12 m²) | €15 – €50 | €80 – €200 |
| Complete room (50 m² walls) | €60 – €200 | €350 – €800 |
| With primer | €20 – €80 extra | Included |
| Ceiling (15 m²) | €20 – €60 | €100 – €250 |
Which Paint to Choose?
Matt Paint
- Advantages: No light reflections, hides imperfections, affordable
- Disadvantages: Not washable, not suitable for kitchens or bathrooms
- Best for: Living rooms, bedrooms
Silk / Satin Paint
- Advantages: Washable, stains easily removed, dirt-resistant
- Disadvantages: Shows imperfections in the wall
- Best for: Children’s rooms, hallways, kitchens, bathrooms
Gloss Paint
- Advantages: Very durable, highest washability
- Best for: Doors, window frames, woodwork
Calculating How Much Paint You Need
Formula: Wall area ÷ coverage per litre (on label) x number of coats
Example: 25 m² wall ÷ 10 m²/L (matt white) x 2 coats = 5 litres
Rule of thumb: Always add 10–15% as a buffer.
When to Use Primer?
| Surface | Primer needed? |
|---|---|
| New plasterboard | Yes (mist coat or sealer) |
| Rough or highly absorbent plaster | Yes (stabilising primer) |
| Old, well-adhered paint | No |
| Painting over a dark colour | Yes (blocking primer) |
| After filler repairs | Yes (spot prime) |
Materials List: Room of 50 m² Wall Area
| Material | Quantity | Approx. Cost |
|---|---|---|
| Emulsion paint (2 coats, 10 m²/L) | 10 litres | €40 – €150 |
| Primer (if required) | 5 litres | €15 – €40 |
| Masking tape (25 m) | 4 rolls | €10 – €20 |
| Paint roller (9 mm pile) | 2 sleeves | €10 – €20 |
| Roller frame (23 cm) | 1 piece | €10 – €20 |
| Cutting-in brush (50 mm) | 1 piece | €8 – €15 |
| Dust sheets | 10 m² | €5 – €10 |
| Paint tray | 1 piece | €5 – €10 |
Step-by-Step: Paint a Wall in 7 Steps
Step 1: Preparation
- Move furniture away from walls or out of the room
- Lay dust sheets on the floor and over furniture
- Mask sockets and light switches with masking tape
- Mask window frames, door frames and skirting boards
- Clean the wall – remove grease and dirt
Step 2: Repair the Wall
- Fill cracks and holes with filler
- Allow to dry (30–60 minutes)
- Sand smooth with fine paper (180 grit)
- Wipe away dust
Step 3: Apply Primer (If Required)
Apply with roller and allow 2–4 hours to dry.
Step 4: Cut In (First Coat)
Paint a 5 cm strip around all edges (corners, ceiling line, skirting) with a brush. Never use a roller right into corners.
Step 5: Apply First Coat with Roller
- Load the roller in the paint tray and remove excess
- Apply in an M or W pattern
- Don’t apply too thick – two thin coats are better
- Roll out evenly for a streak-free finish
Step 6: Dry and Apply Second Coat
Allow at least 2–4 hours to dry (follow manufacturer’s instructions). Then apply the second coat as the first.
Step 7: Finishing Up
- Remove masking tape carefully – while paint is still slightly tacky
- Remove dust sheets
- Clean up edges and splashes with a damp cloth
- Wash rollers and brushes immediately in water (for latex/emulsion paints)
Common Mistakes
| Mistake | Consequence | Solution |
|---|---|---|
| Not enough masking tape | Paint on frames and boards | Mask generously |
| Applying too thick a coat | Drips, uneven finish | Two thin coats better than one thick |
| Roller not unloaded | Paint splatters | Always work off excess in the tray |
| Removing masking tape too late | Paint tears off | Remove while still slightly wet |
FAQs
How much paint do I need?
Wall area (m²) ÷ coverage per litre x number of coats. Always add 10–15% buffer.
Matt or silk?
Matt paint for low-traffic rooms. Silk for high-use rooms: kitchen, bathroom, hallway.
Do I always need two coats?
One coat may be enough over white when using white. For colour changes or new walls, always apply two coats.
Building Plans and Guides
Ready to get started? Visit fredsdiyplans.com – with thousands of plans for every DIY project.