Materials
How Custom Cabinets Are Built
Updated 3 min read
The short answer
Custom cabinet quality is decided long before the doors are hung. The carcass material and thickness, the drawer box joinery, the slide and hinge specification, and how the edge is treated all determine whether the kitchen looks good in ten years or starts failing in three. Understanding these details lets you compare quotes on construction quality rather than just door style.
Carcass construction: what matters
| Component | Budget specification | Quality specification | Why it matters |
|---|---|---|---|
| Carcass material | 15mm particleboard | 18mm plywood or cabinet-grade ply | Rigidity, screw-holding, moisture resistance |
| Back panel | 3mm hardboard | 12–18mm plywood | Structural rigidity; wall-cabinet mounting surface |
| Shelf thickness | 15mm with edge band | 18mm with solid lipping | Sag resistance under load over time |
| Bottom panel | Same as carcass | Same as carcass, dadoed into sides | Strength at the most-stressed joint |
| Edge treatment | Iron-on melamine tape | PVC banding or solid lipping | Durability at the most-touched surface |
| Assembly | Dowel and glue | Dado, glue and pin or screw | Long-term structural integrity |
The three cabinet construction methods
There are three primary ways a cabinet box gets built, and each has genuine trade-offs. Understanding them lets you ask the right question when comparing quotes.
Face-frame construction uses a solid wood frame attached to the front of the cabinet box. Doors overlay the frame. This is the traditional American method, and it adds rigidity to the carcass while providing a solid surface for hinge mounting. The downside is that the frame creates a lip that reduces accessible interior space.
Frameless (European) construction uses the cabinet box itself as the structure. Doors mount directly to the side panels with concealed hinges, and the full interior is accessible. This method demands more precise construction because there is no frame to hide gaps, but it provides roughly 15% more usable interior space.
The third approach — hybrid — uses a face frame or applied frame on a frameless carcass. It gives the visual of face-frame construction with the interior access of frameless. This is what most custom cabinetmakers in Calgary actually build.
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Drawer construction — where quality shows first
- Dovetail drawer boxes
- The mechanical interlock of dovetail joints makes the drawer box structurally superior to any fastener-based method. Look for solid hardwood dovetails, not machined imitations in particleboard.
- Drawer bottom
- Should be 6mm plywood minimum, captured in a groove in the drawer sides. A bottom that is stapled or glued to the underside is a failure waiting to happen under load.
- Undermount slides vs side-mount
- Undermount slides are concealed, provide full extension, and soft-close as standard. Side-mount roller slides are cheaper but limit extension and are visible. For kitchen cabinetry, undermount is the specification that makes sense.
- Drawer depth and height
- Deep drawers (200–250mm front) hold more than a door base with shelves. Three drawers per 900mm base cabinet is a strong default. The bottom drawer should be deepest for pots and pans.
Hardware specification: what to ask
| Component | What to ask | Minimum quality | Better specification |
|---|---|---|---|
| Hinges | Brand, adjustability, soft-close? | European concealed, 3-way adjustable | Blum or equivalent; integrated soft-close |
| Drawer slides | Extension, load rating, soft-close? | Side-mount, full extension, 45kg | Undermount, full extension, soft-close, 70kg+ |
| Drawer boxes | Material, joinery method? | Plywood sides, dovetail or dowel | Solid hardwood dovetails, plywood bottom |
| Shelf supports | Fixed or adjustable? | Pins in drilled holes | System holes at 32mm centres for full adjustability |
| Door stops | Integrated or separate? | Bumper pads | Integrated soft-close mechanism in hinge |
Answers
Frequently asked questions
- What is the best cabinet construction method?
- There is no single best method — it depends on the application. Frameless construction provides the most accessible interior and is standard in modern kitchens. Face-frame adds rigidity and works well for traditional styles. For Calgary homes, the hybrid approach (frameless carcass with applied face frame) gives the best of both.
- How thick should cabinet carcasses be?
- 18mm plywood is the professional standard for the sides, top and bottom. Some manufacturers use 15mm, which is acceptable for smaller units but will sag on wider spans. For wall cabinets especially, 18mm is worth insisting on.
- Are dovetail drawers worth the cost?
- Yes, and they are not optional in quality cabinetry. Dovetail joints are mechanically locked and will not pull apart under the daily stress of opening and closing. Stapled or glued drawer boxes are a sign of cost-cutting that extends to other unseen components.
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