Ordering wall panels is mostly straightforward except for one question: how many do I actually need? Get it wrong and you either pay for shipping twice (under-order) or have leftover stock to store (over-order). This guide gives you the exact formula plus worked examples for every common UK room type.

The simple formula

Panels needed = (Wall area to cover ÷ Area per panel) + Waste allowance

Step 1: Measure the wall area

Wall area (m²) = Width × Height. Repeat for each wall you're panelling. Add them all up.

Then subtract the area of any windows, doors, or shower screens that are taller than 800mm — these don't need panelling.

Step 2: Calculate area per panel

Each panel's area = Width × Length. Common sizes:

• Acoustic slat panels: 2400 × 600mm = 1.44 m² per panel
• Wide PVC wall panels: 2400 × 1000mm = 2.4 m² per panel
• Wide PVC wall panels: 2600 × 1000mm = 2.6 m² per panel
• Tongue-and-groove PVC: 2600 × 250mm = 0.65 m² per panel
• Kitchen splashback: 2400 × 1000mm = 2.4 m² per panel

Step 3: Add waste allowance

Always add 10–15% extra for cutting, mistakes, and matching pattern across joints. Round up to whole panels (you can't buy half).

Worked examples

Example 1: Small UK bathroom (full walls)

4 walls, average 2.4m high × 8m total length = 19.2 m² wall area
Subtract door (2.0m × 0.8m = 1.6 m²) and window (1.0m × 0.6m = 0.6 m²) = 17 m² wall area
Using 10mm wide PVC panels (2.4 m² each): 17 / 2.4 = 7.08, plus 15% waste = 8.15 → 9 panels

Example 2: Shower cubicle (3 walls)

3 walls of 2.0m high × 0.9m wide = 5.4 m²
Using tongue-and-groove 250mm panels (0.52 m² each at 2.0m): 5.4 / 0.52 = 10.4, plus 15% waste = 11.96 → 12 panels

Example 3: Living room acoustic feature wall

One wall: 3.0m high × 4.5m wide = 13.5 m²
Using acoustic slat panels (1.44 m² each): 13.5 / 1.44 = 9.4, plus 10% waste = 10.3 → 11 panels

Example 4: Kitchen splashback (between worktop and wall units)

Splashback area: 0.55m high × 4.0m wide = 2.2 m²
Using 10mm splashback panels (2.4 m² each): 1 panel covers it, plus a spare for cutting = 2 panels

Example 5: Home office acoustic camera wall

One wall behind desk: 2.4m high × 3.0m wide = 7.2 m²
Using acoustic slat panels (1.44 m² each): 7.2 / 1.44 = 5.0, plus 10% waste = 5.5 → 6 panels

Plus what you also need

Trims and end caps

Whatever panels you buy, you'll need trims for clean edges and corners.

• End caps: 1 per visible vertical edge (typically 2 for a single feature wall)
• Internal corner trims: 1 per inside corner
• External corner trims: 1 per outside corner
• Coving / top trim: length of the run if you want a finished top edge

See our PVC trims range.

Adhesive

For adhesive-fix installs: 1 large tube of grab adhesive covers approximately 6–8 m² of panels.

Silicone

For wet-area installs: 1 cartridge of mould-resistant silicone covers approximately 12 linear metres of seam.

Common ordering mistakes

• Forgetting to round up. 7.3 panels means 8 panels, not 7.
• Skipping waste allowance. 10–15% accounts for cuts, errors and pattern matching. Don't skip.
• Mixing batches. Patterns can shift slightly between production runs. Order all panels in one go.
• Forgetting trims. Trims are not optional in wet areas. Add them at order time.
• Buying the wrong width. 250mm tongue-and-groove panels look very different from 1m wide-panels. Check the visual you want.

FAQs

Can I order one extra panel as a 'just in case'?
Yes, and we recommend it for most projects. The cost of one extra panel is much less than the cost of re-ordering and waiting for delivery.

What if I cut a panel and ruin it?
That's exactly what the waste allowance covers. Most DIYers ruin 0–1 panel in a small bathroom job.

Will I get the same pattern across all panels?
Marble-effect panels do have slight variation. We recommend laying out all panels before installing to choose the most pleasing arrangement of veining.

Do you offer trade pricing for big orders?
Yes — contact us for trade pricing on bulk pallet orders.

Browse the range

Now you know how many you need, browse our PVC wall panels, acoustic wall panels, kitchen splashbacks, PVC ceiling panels, and trims.