Building camper van furniture: wood, weight and tips

The most important material choice for camper van furniture is the board material:

Poplar plywood is the lightest (~400 kg/m³). Soft wood, easy to work with. 12 mm is the minimum thickness for load-bearing structures. Ideal when weight is the priority. Downside: softer surface, more prone to dents.

Birch plywood is stronger and harder (~680 kg/m³). The professional choice. 9 mm birch is comparable in strength to 12 mm poplar. Better surface finish, can be left untreated. Downside: 70% heavier than poplar.

Okoumé plywood sits in the middle ground for weight (~500 kg/m³). Good moisture resistance. Popular with boat builders and therefore also suitable for camper vans.

Avoid: MDF (too heavy, not moisture resistant), chipboard (breaks with vibrations, swells with moisture), solid wood (too heavy, warps with temperature changes).

Always choose WBP-glued plywood (Water and Boil Proof) for moisture resistance.

Camper van furniture must withstand vibrations, impacts and temperature changes. Here are proven construction methods:

Pocket hole joinery is the most popular method among DIY builders. With a Kreg Jig you make angled screw holes that are invisible on the outside. Fast, strong and no clamps needed.

Dowel or biscuit joints are neater and stronger than screws, but require more tools and experience.

Corner brackets and L-profiles are the simplest method. Aluminium angle profiles (20×20 mm) are light and strong. Less attractive but reliable.

Frame + panel: build a light frame of battens (30×30 mm) and clad with thin panels (4-6 mm). Lighter than solid boards but labour-intensive.

Always attach furniture to the body with through-bolt connections or bonding plates (glued reinforcement plates). Screws into single sheet metal won't hold under vibrations.

Furniture is often the heaviest item after batteries. Here are concrete savings:

Material:

• Poplar instead of birch plywood: about a third lighter
• 9 mm instead of 12 mm where possible: about a quarter lighter
• Honeycomb panels for non-load-bearing surfaces (doors, side panels): up to 60% lighter

Construction:

• Use open shelves instead of closed cabinets where possible
• Make doors from 4 mm plywood with a frame: lighter than solid doors
• Use aluminium instead of wooden frames for the bed
• Avoid unnecessary dividing walls

Reference weights per item:

• Kitchen unit: 15-25 kg
• Bed frame: 15-30 kg
• Dinette/seating area: 10-20 kg
• Overhead cabinets (each): 3-8 kg
• Wardrobe: 8-15 kg

Total furniture: 60-120 kg for a lightweight build, 100-200 kg for a standard build.

Untreated plywood is vulnerable to moisture and dirt. Here are the options:

Hardwax oil (e.g. Osmo, Rubio Monocoat) is the most popular choice among camper van builders. It penetrates the wood, protects against moisture and dirt, and maintains the natural look. 2-3 coats, easy to touch up.

Varnish (water-based) offers better moisture protection than oil, but is harder to repair when damaged. Makes the surface smoother.

HPL laminate is a thin, hard surface glued onto plywood. Scratch-resistant and waterproof. Poplar plywood is available pre-finished with HPL.

Film or vinyl wrapping is the cheapest option. Easy to apply, many colours/patterns available. Can peel off in heat.

Tip: treat the undersides and insides of cabinets too — moisture comes from all directions. One coat of hardwax oil on hidden surfaces is sufficient.

Saving weight on furniture starts with knowing what a sheet weighs. Birch plywood has a density of around 680 kg per cubic metre, poplar around 470.

Converted to what you pick up in the shop:

• 12 mm birch: about 8.2 kg per square metre
• 12 mm poplar: about 5.6 kg per square metre
• 9 mm birch: about 6.1 kg per square metre
• 18 mm birch: about 12.2 kg per square metre

A full sheet of 2500 by 1250 mm is 3.1 square metres. In 12 mm birch it weighs 26 kg, in poplar 18 kg.

An average conversion goes through five to eight of those sheets. Choose poplar everywhere you can and that saves you over 60 kg across eight sheets. That is a third of your furniture weight, and it costs you nothing in space.

Where poplar should not go: hinge points, drawer runners and anything taking a point load. The fibre is softer and screws pull out of it sooner.

A camper is a piece of furniture that drives over kerbs every day. Joints that last forever in a living room come loose in a van after six months.

What does not survive the vibration: a screw straight into the end grain of plywood. The fibre barely holds there, and that joint is exactly the one under changing load.

What does work:

• Glue plus dowels or biscuits, so the glue line takes the force and the screw only clamps while it dries
• An aluminium angle profile in the inside corner, screwed through the face of the board
• Pocket-hole screws with a jig, so you screw into the face rather than the end
• Construction adhesive on large glue areas, spreading the weight over surface

Put a triangle in wherever you can. A cabinet with a diagonal corner brace or a glued-in back panel stops racking. Without that stiffening, every rectangle slowly becomes a parallelogram, and you hear that as creaking.

The panel steel of a van is about 0.8 mm thick. No screw holds in that when it has to carry a cabinet with fifty kilos in it during an emergency stop.

The fixing belongs in the ribs and frames, because that is the vehicle's structure. Drill through those and use a bolt with a spreader plate on the back, so the force never sits on one point.

Where there is no rib, bond a spreader plate of plywood or aluminium to the panel and screw into that. Such a plate spreads the force across a hand's width rather than a screw point.

Take this seriously as a calculation. In an emergency stop everything in your van is under a multiple of its own weight, and a cabinet full of tins that comes loose goes straight through the panelling. It is also what inspectors look at during a conversion test: fixed fittings must be fixed.

Treat every new hole in the bodywork on both sides against rust, even when a bolt goes straight through it.

There is not a single right angle in a panel van. The walls bulge, they lean inwards towards the top, and the left is not the same as the right.

The approach that works: make a template of cardboard or thin hardboard for every panel first. Cut it slightly oversized, press it into the corner and trim it back step by step until it fits. Only then do you trace it onto the plywood.

For a long wall, work with two strips that you tape together inside the van. That captures the curve without hauling a two-metre board back and forth.

Never measure only the top and bottom of a surface and assume a straight line between them. That is the mistake that costs the most cutting.

Build your furniture outside the van where you can, on a flat surface, and only then fit it. Being able to work from three sides saves hours, and it saves the back you still need.