The perfect geometry of fitted furniture is created long before assembly in the workshop — it starts with level walls and precise service outlets on site. Premium furniture systems are designed with minimal shadow gaps (often no more than 2–3 mm), so any inaccuracy in the rough finish inevitably shows up during installation.
Below is a checklist of the critical junctions that architects, site managers and clients should check before the final finish. Kult Interiors reviews these junctions against the drawings, so Rough-in mistakes do not surface before the furniture install.
1. Corner geometry: a true 90 degrees in built-in zones
The main reason for wedge-shaped gaps between the worktop, the cabinet and the wall is an out-of-square corner.
- Kitchen runs: If the angle between adjoining walls is 89° or 91°, the corner unit and the worktop will not sit flush. The furniture then has to be trimmed on site, or decorative cover strips have to be used, which breaks the minimalist look.
- Wardrobes built into niches: Walls out of plumb mean that hinged or sliding fronts will catch the plaster as they open.
2. Preparing the wall plane for veneered and MDF panels
Installing full-size decorative wall panels requires a true plane, not merely a surface that looks smooth:
- The “lens” effect: If the wall dips in the centre, a rigid furniture panel will either fail to sit against the substrate or pull neighbouring elements with it, breaking the single plane of the fronts.
- Checking with a level: The acceptable deviation of the plane for large-format panels is no more than 1–2 mm over 2 linear metres of straightedge.
3. Accuracy of electrical and plumbing outlets
Shifting services by even a few centimetres often blocks the installation of mechanisms:
- Sockets behind built-in appliances: Sockets for dishwashers, ovens and refrigerators must never sit directly behind the appliance body — the appliance simply will not reach its designed depth. Outlets should be placed in neighbouring sections or in the plinth zone.
- Cables for lighting (LED): The power cable outlet must coincide exactly with the designed point of the recessed profile, otherwise the cable will be visible or will be cut during routing.
- Water outlets and drainage in bathrooms: An incorrectly calculated waste height will make it impossible to install a wall-hung vanity at the planned level without rebuilding the internal drawers.
4. Junctions with ceilings and shadow profiles
Contemporary projects often place cabinets flush with a ceiling shadow trim:
- The level of the ceiling structure: A height difference of even 5 mm along a four-metre wardrobe makes it impossible to install doors up to the ceiling without a visible skew in the gap.
- Backing elements: With plasterboard or stretch ceilings, rigid timber battens or aluminium profiles must be installed in advance at the exact coordinates of the furniture cabinet.
Passing the technical brief from the furniture workshop to the construction crew in time rules out costly rework and guarantees a precise result without unnecessary compromises.
Questions and answers
Which rough-stage mistakes get in the way of installing fitted furniture?
Installation is blocked by inaccuracies in wall geometry, corners and service outlets. Premium systems are designed with shadow gaps of 2–3 mm, so an out-of-square corner, a dip in the wall or a shifted outlet shows up during fitting.
What wall angle does fitted furniture need?
In built-in zones the angle between adjoining walls must be a true 90 degrees. At 89° or 91° the corner unit and the worktop will not sit flush: the furniture has to be trimmed on site or covered with decorative strips.
What wall deviation is acceptable under veneered and MDF panels?
The plane under large-format panels may deviate by no more than 1–2 mm over 2 linear metres of straightedge. A dip in the centre creates a lens effect: the panel fails to sit against the substrate or pulls neighbouring fronts out of plane.
Where should sockets for built-in appliances be placed?
Sockets for a dishwasher, oven or refrigerator must not sit directly behind the appliance. Outlets belong in a neighbouring section or in the plinth zone, otherwise the appliance will not reach its designed depth.
Where should the furniture lighting cable come out?
The power cable must exit exactly at the designed point of the recessed profile. Otherwise the cable stays visible or is cut during routing.
What waste height blocks a wall-hung vanity?
An incorrectly calculated waste outlet height makes it impossible to install a wall-hung vanity at the planned level without rebuilding the internal drawers.
What ceiling height difference blocks a wardrobe that runs to the ceiling?
A difference of 5 mm along a four-metre wardrobe makes it impossible to install doors up to the ceiling without a visible skew in the gap. Plasterboard and stretch ceilings need rigid backing fixed in advance at the cabinet coordinates.