How to Build Cabinets: Essential Hardware Guide
Constructing bespoke storage requires precise cutting, careful squaring, and the correct choice of fittings. While timber panels form the basic framework, the hardware you choose determines how sturdy, functional, and long-lasting the finished piece will be. If you want to master how to build cabinets that rival factory-made units, understanding how to select and fit key structural components is essential.
Carcass Assembly and Structural Fixings
The carcass is the structural core of any cabinet. Traditional joinery such as rebated joints or dowels works well, but modern flat-pack hardware offers exceptional strength with the added benefit of easier assembly and dismantling.
- Cam and Dowel Connectors: Ideal for hidden fixings in chipboard and MDF carcasses. They pull panels tightly together using a rotating cam housing locked over a steel connecting bolt.
- Confirmat Screws: These heavy-duty, single-piece steel screws cut their own thread into pre-drilled stepped holes. They provide immense sheer strength for utility cabinets and base units.
- Back Panel Fixings: A cabinet derives much of its diagonal rigidity from the back panel. Secure 3 mm to 6 mm hardboard backs using backboard screws with wide washers or dedicated nylon corner brackets.
Hinges and Door Mounting
For standard kitchen and utility cabinets, European-style concealed hinges are the trade standard. When learning how to build cabinets, getting hinge hole drilling right ensures seamless door alignment.
Standard concealed hinges require a 35 mm diameter cup hole drilled into the back of the door, usually positioned 21 mm to 22.5 mm from the edge and 100 mm from the top and bottom. Standard variations include:
- Full Overlay: The door covers the full thickness of the carcass side panel (typically 18 mm), leaving a small gap between adjacent doors.
- Half Overlay: Used on central dividing panels where two doors share a single vertical upright.
- Inset: The door sits entirely flush inside the carcass opening.
Always opt for clip-on mounting plates with three-way cam adjustment, allowing you to fine-tune lateral, vertical, and depth positioning effortlessly.
Selecting and Fitting Drawer Runners
Smooth drawer movement depends entirely on runner selection and accurate carcass spacing. Ensure the internal carcass width is completely uniform from front to back to avoid binding.
- Roller Runners: Bottom-mounted, budget-friendly runners suitable for lightweight drawers and basic utility storage.
- Ball-Bearing Runners: Side-mounted metal tracks that offer higher load capacities and full extension, giving complete access to the drawer interior.
- Undermount Soft-Close Runners: Concealed beneath the drawer base, providing a clean, premium look alongside smooth dampening action.
Base Support and Levelling Hardware
Uneven floors can warp a rigid carcass over time and cause door hinges to bind. Instead of resting timber panels directly on the floor, install adjustable plastic plinth legs.
These legs screw into the base panel, allowing individual height adjustments to level the entire unit perfectly before securing it to the wall. Plinth clips snap directly onto the legs, making it simple to attach or remove a matching kickboard during maintenance or cleaning.
Frequently Asked Questions
What panel thickness is standard for DIY cabinets?
In the UK, 18 mm melamine-faced chipboard (MFC) or birch plywood is the standard thickness for carcass sides, tops, and bases, offering optimal screw-holding strength and rigidity.
What drilling pattern is used for cabinet hardware?
Most professional furniture hardware is designed around the 32 mm system. This standard uses rows of 5 mm diameter holes spaced 32 mm apart, positioned 37 mm back from the front edge for shelf supports, hinges, and runner plates.