Lightweight Furniture Board for Campervan Conversions
Weight is the enemy of campervan conversions. Every kg you add reduces your payload for water, gear, and passengers. Standard 18mm birch ply is heavy — about 11kg per m². For a full van build with 20m² of board, that is 220kg before you add appliances, cushions, and personal gear.
This guide covers lightweight alternatives that can halve the weight of your furniture.
Weight Targets
A typical campervan conversion adds 400-700 kg of weight. Target ranges:
- Ultralight build: Under 200kg (featherweight furniture, minimal systems)
- Medium build: 300-500kg (standard plywood, basic systems)
- Heavy build: 600kg+ (full household-style furniture, large appliances)
Lightweight Material Options
1. Honeycomb Core Panels (Best Overall)
Honeycomb panels have a polypropylene (PP) or aluminium honeycomb core with thin facesheets of fibreglass, aluminium, or plywood.
- Weight: 3.5-5 kg/m² for 18mm panel (vs 11kg for plywood)
- Strength: Excellent — honeycomb structure is incredibly stiff
- Cost: £60-100 per m² (3-5x plywood)
- Suppliers: RDS Composites, CEL Components, Easy Composites UK
Best for: Large flat panels — bed bases, table tops, cabinet sides. Not suitable for complex shapes or heavily loaded shelves.
Real-world example: A full kitchen unit in 18mm honeycomb panel weighs 8kg vs 22kg in birch ply.
2. Foam Core / Foamular Panels (Mid-Weight)
A rigid foam core (XPS or polyurethane) faced with thin ply or fibreglass.
- Weight: 5-7 kg/m² for 25mm panel
- Strength: Good for flat panels, poor for point loads (screw pull-out is low)
- Cost: £40-60 per m²
Best for: Wall and ceiling panels, lightweight cabinet doors.
Limitation: Screws pull out easily. Use threaded inserts (M4 or M6) for any structural fixings.
3. Aluminium Composite Panel (Alupanel)
Two thin aluminium sheets bonded to a polyethylene core. Also called Alucobond or Dibond.
- Weight: 4-6 kg/m² for 3-4mm panel
- Strength: Very stiff for its thickness, good impact resistance
- Cost: £30-50 per m²
- Available from: Sign supply shops (used for signage)
Best for: Decorative wall panels, splashbacks, lightweight cabinet doors.
Limitation: Cannot take screws — must use rivets or adhesive. Not structural.
4. Project Panels (Very Lightweight)
Slotted polypropylene sheets that lock together like corrugated plastic. Used in exhibition displays.
- Weight: 1.5-2.5 kg/m²
- Strength: Low — only suitable for non-structural use
- Cost: £15-30 per m²
Best for: Storage bin dividers, drawer organisers, lightweight shelving.
5. Lite-Ply and Ultralight Plywood
Plywood made from thinner veneers (poplar, Paulownia, or okoume instead of birch).
- Weight: 6-8 kg/m² for 18mm (vs 11kg birch)
- Strength: 60-70% of birch plywood
- Cost: £40-70 per m²
- UK suppliers: Robbins Timber (Bristol), South London Timber (London)
Best for: A direct plywood replacement that still handles screws and glue well.
Weight Comparison Table
| Material | Weight (18mm) | Strength | Cost/m² | Screw Holding |
|---|---|---|---|---|
| Birch plywood | 11 kg | Excellent | £60 | Excellent |
| Honeycomb PP | 4 kg | Very good | £80 | Requires inserts |
| Foam core | 6 kg | Good | £50 | Poor |
| Alupanel (4mm) | 5 kg | Good (stiff) | £40 | Rivets only |
| Lite-ply (poplar) | 7 kg | Good | £50 | Good |
| Project panel | 2 kg | Low | £20 | None |
| OSB | 9 kg | Moderate | £25 | Moderate |
Which Panel Goes Where
Bed Base
Best: Honeycomb core panel (lightest and strong enough for point loads from mattress) Good: Lite-ply or 12mm birch ply
Kitchen Cabinets
Best: 12mm birch ply with honeycomb panel doors Good: Lite-ply with careful sealing
Wall Panels
Best: 4mm Alupanel (visually clean, lightweight, easy to clean) Good: 4mm birch ply (cheaper, can be painted)
Ceiling
Best: 3mm ply on 3mm foam core (light + insulating) Good: 4mm ply (simple and light enough)
Cupboard Doors
Best: Honeycomb panel or Alupanel (lightweight, rattle-free) Good: 6mm ply with edge banding
Weight Saving Strategy
A strategic approach saves the most weight per pound spent:
- Replace large panels first — ceiling, wall panels, bed base. These are the biggest area.
- Replace cupboard doors — 20 doors at 0.3m² each = 6m². Saving 4kg/m² = 24kg saved.
- Use 12mm instead of 18mm where possible — structure aside, many panels are over-engineered.
- Avoid double layers — some builds layer 6mm wall panel + 12mm cabinet back. One 12mm honeycomb board does both jobs at 70% less weight.
Example Weight Budget
| Component | Standard (Birch 18mm) | Lightweight Build | Saving |
|---|---|---|---|
| Bed base (2.5m²) | 27.5 kg | 10 kg (honeycomb) | 17.5 kg |
| Kitchen (4m²) | 44 kg | 20 kg (lite-ply) | 24 kg |
| Cupboard doors (3m²) | 33 kg | 9 kg (Alupanel) | 24 kg |
| Wall panels (8m²) | 36 kg (6mm ply) | 16 kg (Alupanel) | 20 kg |
| Ceiling (4m²) | 16 kg (4mm ply) | 8 kg (foam core) | 8 kg |
| Total | 156.5 kg | 63 kg | 93.5 kg saved |
Conclusion
Lightweight board materials can save 90-100kg from a typical van conversion — enough to carry an extra passenger, a full water tank, or a bike rack without exceeding your payload.
Our recommendation: Use honeycomb core panels for bed bases and large surfaces, lite-ply for cabinets, and Alupanel for wall and ceiling panels. Budget an extra £200-400 for materials, but the weight saving is worth it for full-time van life.
