When planning a kitchen renovation, most homeowners spend their energy choosing cabinet door styles, countertop materials, and colour schemes. The question of what sits underneath the cabinets — specifically whether to use a cement plinth or adjustable metal legs — rarely gets much thought. But this is one of those decisions that quietly determines how long your kitchen cabinets last. Our lead carpenter with 40 years of experience has a clear recommendation: if you can build a cement base, build one.

The Two Reasons a Cement Base Is Worth Building

Kitchen cabinets face two structural challenges that a proper cement base addresses directly.

Challenge one: moisture from floor washing. Kitchens are the most water-exposed room in any home. Washing dishes, mopping floors, steam from cooking — all of it contributes to a persistently damp environment, especially at floor level. If the base of a wooden cabinet sits directly on floor tiles, water from regular floor cleaning can seep underneath. Over time, this leads to the base board swelling, laminate bubbling, or the structural integrity of the cabinet weakening. A cement plinth lifts the cabinet base off the floor, creating a barrier that prevents direct contact with cleaning water.

Challenge two: the kitchen floor is not flat. This is something many homeowners do not realise until a contractor points it out. Kitchen floors are deliberately laid with a slight slope toward the drain to allow water to run off. This means the surface the cabinets sit on is not level. Placing cabinet carcasses directly on a sloped floor results in uneven cabinets — one side higher than the other — which causes door alignment problems, makes hinges work harder, and can lead to warping over time. A cement plinth gives the contractor the opportunity to screed the base perfectly level before the cabinets go in.

The Right Dimensions: Height and Depth Matter

A cement plinth is not just a rough block of concrete poured under the cabinets. The dimensions need to be considered carefully.

The recommended specification is:

Height: 50 mm (5 cm)
Depth: 530 mm

Why 50 mm height? This is an experience-based figure calibrated to provide meaningful moisture protection without making the overall cabinet height feel awkward. A plinth of only 20–30 mm offers limited protection against floor washing water. Go above 80 mm and the cabinet starts to sit visually high, while also pushing the worktop height up to a level that may become uncomfortable for shorter users.

Why 530 mm depth? Standard kitchen base cabinets run around 550–600 mm deep. At 530 mm, the cement plinth sits just inside the cabinet footprint. Too shallow and the gap between the plinth edge and the cabinet base creates a narrow recess that is nearly impossible to clean properly — grease and debris collect there permanently. Too deep and the plinth edge protrudes beyond the cabinet, exposing tile edging and creating a lip that looks untidy and is easy to trip over.

Cement Base vs Adjustable Metal Legs: A Practical Comparison

Some cabinet installation systems use adjustable metal legs rather than a cement base. Both approaches are used in the market. Here is how they compare:

Criteria	Cement Base	Adjustable Metal Legs
Moisture resistance	Excellent — sealed base prevents water entry	Fair — metal legs corrode in damp environments
Levelling	Permanently levelled during screeding	Adjustable, but may shift over time
Structural stability	Very solid, no movement	Stable, but screws may loosen with age
Flexibility	Permanent — not easy to alter	Cabinets can be removed and repositioned
Cleaning ease	Closed base is easy to clean	Multiple leg gaps are harder to clean
Best suited for	Permanent kitchen installations	Rental properties or layouts needing flexibility

For a kitchen that you intend to use for many years, the cement base is the more durable and lower-maintenance option. Adjustable legs have their place in situations where future reconfiguration is likely — such as rental units or serviced apartments — but for a family home, the solid foundation of a properly built cement plinth is the better investment.

Custom Cabinet Lead Time: Why Early Planning Matters

Homeowners sometimes wonder how long it takes to make a set of custom kitchen cabinets from scratch. Understanding the timeline helps you plan your overall renovation schedule and avoid delays.

From the point when drawings are confirmed and materials are in stock, the manufacturing process typically takes 2 to 3 days. For more complex designs — corner units, special profiles, or work that requires grain or pattern matching — the production time may extend beyond this.

After manufacturing, on-site installation takes 1 to 2 days, depending on the complexity of the layout and the site conditions. If cement plinths are part of the plan, these need to be poured and allowed to cure before the cabinets can be installed — typically adding a few days to the schedule.

In total, from finalised drawings to a completed kitchen, expect approximately one week. This is the fundamental difference between fully custom and ready-made furniture: custom work is not optimised for speed. Every board is handled individually, every joint is fitted by hand. That precision takes time, and the result is a cabinet that holds up for decades rather than years.

Conclusion: Quality Starts at the Foundation

A kitchen cabinet’s quality is not just visible in the door finish or the colour of the laminate. It starts at the very base — how the cabinet meets the floor, how it is protected from moisture, and how well it is levelled for installation. A properly built cement plinth is one of those unglamorous details that you will never think about after the renovation is done — because everything will just work, year after year.

Before your kitchen renovation begins, confirm with your contractor whether a cement base is part of the plan, and make sure the height and depth specifications are discussed. Getting this right at the start costs very little extra but pays dividends in durability and long-term peace of mind.