Bathroom Lowboards: Dimensions, Solutions, and Ideas

A bathroom lowboard is a piece of furniture with a maximum height of 60 cm, either floor-standing or wall-mounted floating, designed to provide storage space beneath the basin or as a side surface.

Bathrooms place unique demands on furniture. High humidity, fluctuating temperatures, and often limited space require careful planning. A floating wall-mounted lowboard acts as a visual anchor in a compact bathroom, bringing calm to the room without taking up valuable floor space. This guide explains which dimensions make sense, what to look for regarding materials, and how standard living room furniture can be adapted for the bathroom.

Typical Dimensions and Space Requirements in the Bathroom

The sizing of a lowboard depends on the room size and intended use. If the furniture is used purely for storage under a window or along a free wall, different criteria apply than when used as a vanity unit.

• Depth: Depths between 35 cm and 50 cm are suitable for bathrooms. A countertop basin generally requires a minimum depth of 45 cm to leave enough room for the tap.
• Height: The carcass height of a lowboard usually lies between 30 cm and 50 cm.
• Width: In small bathrooms, widths from 60 cm to 90 cm are sufficient. For double basins, a Lowboard 140 cm or a Lowboard 150cm provides ample surface area for two people. In very large bathrooms, a continuous unit can be created, for example using a Lowboard 240 cm or a Lowboard 250 cm.

If the lowboard is used as a vanity unit, the recommended upper edge of the basin is 85 cm to 90 cm. The mounting height of the lowboard must be calculated according to the height of the countertop basin.

Materials and Moisture Protection

Bathroom furniture must withstand splashing water and damp air. Solid wood requires regular maintenance with hard wax oil. Most industrially manufactured lowboards are made of chipboard or MDF (medium-density fibreboard).

The coating is the decisive factor. Melamine resin-coated surfaces are water-repellent and easy to clean. Crucial for DIY enthusiasts: as soon as the surface is cut into – for instance for the trap cutout – the core wood is exposed. These cut edges must strictly be sealed. Transparent sanitary silicone is ideal for this, applied generously to the raw edge and smoothed down. Without this seal, the wood will swell upon contact with water.

Fittings: Runners and Hinges in the Bathroom

The choice of furniture fittings determines everyday convenience. For drawers under the washbasin, a full-extension runner is advisable. Unlike a single-extension runner, it allows the drawer to be pulled out 100%, making it far easier to access cosmetics stored at the back.

A system with soft-close cushions the momentum when closing and pulls the drawer shut gently. This is not to be confused with a push-to-open mechanism (tip-on). Push-to-open requires pressure on the front to open. In the bathroom, this is often impractical, as wet or moisturised hands leave visible marks on handleless fronts. Screw-on profile handles or milled recessed grips require far less maintenance here.

If the lowboard features doors, concealed hinges are used. A standard concealed cup hinge with a 35 mm cup diameter and an opening angle of 110° is sufficient for most bathroom cabinets.

Repurposing Living Room Lowboards for the Bathroom

DIYers often cannot find the exact design they want within dedicated bathroom ranges. It is entirely possible to convert a classic Lowboard For TV into a vanity unit. The carcass construction is identical.

Visually, muted tones blend well into modern bathrooms. A Lowboard Beige harmonises with warm sandstone tiles, whilst a Lowboard Concrete Effect accentuates an industrial style with large grey tiles.

When converting TV furniture into a vanity unit, the following steps are required:

1. Cut the trap cutout: Use a jigsaw to cut a U-shaped opening into the top panel and, if necessary, the upper drawer base to make room for the waste pipe.
2. Seal the edges: Seal all fresh cut edges with silicone to make them watertight.
3. Adjust the back panel: The thin HDF back panel must be cut out for the angle valves (water supply).
4. Secure the flaps: Many TV lowboards have downward-opening flaps. If these are to hold heavy towels in the bathroom, retrofitting sturdy flap stays or Gas Struts for Heavy Flaps is recommended. The force of the struts is specified in Newtons (N) and must be matched to the weight of the MDF front.

Wall Mounting: Required Tools and Procedure

A wall-hung lowboard makes cleaning the bathroom floor considerably easier. Since a fully loaded unit including a ceramic basin can quickly weigh over 50 kg, secure anchoring in the masonry is essential.

Required tools:

• Impact drill or rotary hammer
• Spirit level and tape measure
• Cordless screwdriver with matching bits (usually PZ or TX)
• Masonry drill bits (usually 8 mm or 10 mm)
• Heavy-duty wall plugs and hex-head screws

Mounting is generally achieved using adjustable cabinet suspension brackets screwed to the internal side panels of the carcass. These hook into a metal rail fixed to the wall. Adjustment screws inside the cabinet allow the lowboard to be fine-tuned by a few millimetres in height and depth after hanging until it is completely level.

On stud walls (plasterboard), standard fixings are not sufficient. Special hollow-wall anchors must be used, or the lowboard must be screwed directly into the studwork timber or metal profiles. If the wall is not strong enough, additional furniture legs should be fitted to transfer the load to the floor.

Frequently Asked Questions (FAQ)

Can I use any lowboard as a vanity unit? In principle yes, provided the top panel can support the weight of the washbasin and is deep enough for the tap fittings. It is essential to waterproof all newly sawn cut edges with silicone, otherwise the chipboard will swell on contact with water.

How high should a lowboard hang in the bathroom? When used as a vanity unit, the mounting height is guided by the basin. The top edge of the basin should sit between 85 cm and 90 cm. For a 15 cm high countertop basin, the top edge of the lowboard is mounted accordingly at a height of 70 cm to 75 cm.

Which screw drive is best for furniture building? For carcass construction, chipboard screws with a diameter of 3.5 mm to 4 mm are typically used. A TX drive (Torx) offers the best torque transmission without cam-out. For connector fittings such as the cam lock connector, a cross-recess PZ (Pozidriv) type is frequently used.

How do I clean matt lacquered or foiled lowboards in the bathroom? A damp cloth is sufficient for regular cleaning. Microfibre cloths should be avoided on high-gloss or delicate matt foils, as they can leave fine scratches on the surface.