Assembling a Highboard — Step-by-Step Guide & Tips

A highboard is a mid-height cabinet whose proper assembly relies entirely on the precise alignment of the carcass and secure wall anchoring.

Whether in the living room, dining area, or as a narrow storage solution in the hallway: assembling a piece of furniture requires a systematic approach. Especially with slimmer models featuring a depth of 30 cm or 35 cm, precision during assembly is essential to guarantee a stable stand. Visually, these units vary greatly – from melamine-coated chipboard in wood decors like Wotan oak to matt lacquered MDF for a modern highboard in black. However, the fundamental mechanical assembly steps remain identical for almost all models.

This guide walks you through the build step by step, explains the correct handling of furniture hardware, and shows how to avoid common mistakes when aligning doors and drawers.

Preparation and Checking the Scope of Delivery

Assembling furniture is like a mechanical clockwork: if a gear does not sit accurately at the beginning, the entire mechanism jams in the end. Before inserting the first dowel, proper preparation is required.

1. Lay packages flat: Open the boxes on the floor. Use the cardboard directly as a soft surface to prevent scratches on the components.
2. Sort components: Lay out all wooden parts in an orderly manner.
3. Check fittings: Empty all screws, hinges, and connecting parts into small bowls. Compare the quantity of parts (e.g. cam locks, wooden dowels, screws) with the parts list in the included instructions.

Tools Required

For assembling highboards, a solid basic set of hand tools is usually sufficient.

• Cross-head screwdrivers: Strictly required in sizes PZ2 (Pozidriv) for most furniture fittings and PH2 (Phillips) for specific screws. The wrong drive will ruin the screw head.
• Cordless screwdriver: With suitable bits and properly set torque (low setting for chipboard).
• Rubber mallet: For gently tapping in wooden dowels and back panel nails.
• Spirit level and folding ruler: For aligning the carcass.
• Drill: For the wall fixing (masonry or wood drill bit, depending on wall construction).

Assembling a Highboard: Step-by-Step Guide

The assembly sequence is critical for structural stability. Always follow the manufacturer's specific instructions, as drilling hole positions vary. However, the process generally follows this proven structure.

Step 1: Base Elements and Side Panels (Carcass)

Start with the base and side panels. Insert the wooden dowels into the designated edge holes. If necessary, apply a small drop of wood glue into the hole before gently tapping the dowel in with the rubber mallet.

The primary connection is usually made using cam locks and connecting pins. Screw the metal pins (dowels) into the pre-drilled threads in the side panels. Then join the panels together. The round cam lock housings are inserted into the large holes of the mating piece and tightened clockwise by about 180° using a screwdriver until the joint closes securely.

Step 2: Fitting the Back Panel and Squaring the Carcass

This step is the most critical for ensuring straight furniture. If the back panel is fitted out of square, the doors cannot be adjusted flush later on.

Lay the assembled carcass face down on the floor. Place the back panel (usually thin HDF) on top. Before nailing or screwing it down, measure the diagonals of the carcass. Use the folding ruler to measure from the top left to the bottom right corner, and compare this measurement with the distance from the top right to the bottom left corner. If both measurements are millimetre-identical, the cabinet is completely square. Now fix the back panel in place.

Step 3: Attaching Furniture Legs

While the carcass is still lying down, fit the furniture legs. For models with a width of 70 cm or 110 cm, an additional central support leg is often provided to prevent the base panel from sagging. Screw the legs securely onto the marked positions. If the legs are height-adjustable, screw them all the way in initially.

Now stand the unit upright and place it in its final position. Use the spirit level to level the highboard accurately using the adjustable feet.

Step 4: Installing Drawers and Runners

If the model features drawers, the runner tracks are installed next. With a ball bearing runner (telescopic slide), the inner rail often needs to be unlatched and removed using a small release lever. The wide outer runner is screwed to the inside of the carcass, whilst the narrow inner rail is fixed to the drawer box.

Pay attention to specifications: a full extension runner pulls out 100%, allowing easy access to the entire contents. A single extension runner stops at around 75%. Carefully slide the assembled drawers into the runners until the mechanism audibly clicks into place.

Step 5: Fitting Doors and Hinges

Doors are secured to the carcass using a concealed hinge. The hinge cup (usually 35 mm in diameter) is pressed into the door recess and screwed in place. The corresponding mounting plate (cruciform plate) is fixed to the inside wall of the cabinet.

There are different mounting types:

• Full overlay: The door completely overlays the carcass edge (standard for most standalone furniture).
• Half overlay: Two doors share a central partition inside the cabinet (semi-overlay).
• Inset: The door sits flush inside the carcass opening.

Clip or screw the doors onto the mounting plates.

Anti-Tip Safety: Wall Fixing is Mandatory

By design, a highboard is taller than a chest of drawers. Especially with narrow models measuring a depth of only 30 cm or 35 cm, the centre of gravity is disadvantageous. If top drawers are fully loaded and pulled out, or if children lean on the doors, the piece of furniture will inevitably tip forward.

Wall anchoring is therefore strictly mandatory. Use the provided mounting brackets. Select appropriate wall plugs and screws tailored to your specific wall construction (concrete, brick, plasterboard). Drill the holes, insert the plugs flush, and screw the brackets securely to the wall and to the top panel of the highboard.

Common Pitfalls and Assembly Tips

• Uneven door gaps: This is rarely due to a manufacturing defect, but rather hinge adjustment. A modern concealed hinge is adjustable in three dimensions (3D). The front screw on the hinge arm regulates lateral overlay (the gap between doors). The rear screw adjusts depth (distance between the door and the carcass). The screws on the mounting plate allow for vertical height adjustment.
• Sticking drawers: Check whether the carcass is perfectly level. A twisted cabinet pulls the drawer runner tracks out of parallel.
• Stripped screw holes: If a screw spins freely in the wood, the cordless screwdriver torque was set too high. In chipboard, filling the hole with a little wood glue and a matchstick, letting it dry, and re-driving the screw by hand will resolve the issue.

FAQ – Frequently Asked Questions about Highboard Assembly

How long does it take to assemble a highboard? Assembly time depends on the size and the number of drawers. An experienced DIYer requires roughly 1.5 to 2 hours for a model measuring 70 cm in width. For more complex designs with multiple doors and runners, allow 2 to 3 hours.

Can I build the furniture on my own? Assembling the carcass itself is usually straightforward to do alone. However, lifting the finished cabinet upright, hanging the doors, and securing the wall brackets often require a second person to avoid damaging materials.

What is the difference between Soft-Close and Push-to-Open? These are two distinct functions. Soft-Close is a damping mechanism that slows down doors and drawers over the final few centimetres and pulls them gently shut. Push-to-Open (or tip-on) is a release mechanism for handleless fronts: applying pressure to the door causes it to pop open slightly. A handleless black highboard typically uses push-to-open hardware.

What is the standard hole diameter for hinges? For almost all standard furniture, the hinge cup hole in the door measures exactly 35 mm in diameter. Only very small or lightweight doors occasionally use hinges with a 26 mm cup.