Factory Assembly Tips: Squaring Carcases & Fitting Blum Runners Fast

Assembling a flatpack kitchen does not require years of cabinet making apprenticeship — because all the precision drilling, dowel boring, and hinge pilot holes have already been CNC-machined in our factory.

Here are 5 time-saving tips from our workshop team to speed up your build.

Tip 1: Build a Waist-High Assembly Table

Never build cabinets on the floor! Assembling 15 to 25 carcasses while kneeling will slow you down and cause fatigue.

Set up two sturdy sawhorses and lay a sheet of 18mm MDF or plywood on top. Lay an old blanket or carpet offcut across the bench to protect high-gloss or matte door finishes from scratches.

Tip 2: Sort Hardware by Cabinet Number

Every panel from Top Line Furniture Flatpacks Online features an adhesive label stating:

• The Cabinet Unit Number (e.g., CAB-01 - Base 2 Door).
• Panel Name (Left Side, Right Side, Bottom, Back, Shelf).
• Edgebanding specifications and overall dimensions.

Group all panels for each cabinet together before opening hardware bags. This prevents confusion between 450mm base drawer runners and 500mm deep drawer runners.

Tip 3: Always Check Diagonal Squareness

Before screwing the solid 16mm back into the carcass:

1. Measure diagonally from top-left to bottom-right corner.
2. Measure diagonally from top-right to bottom-left corner.
3. If the two measurements are identical, your cabinet is dead square!
4. Fix the back panel securely into the pre-drilled pilot holes. A square carcase ensures that doors and drawers will align effortlessly with perfect 2mm shadowlines.

Tip 4: Fit Drawer Runners Before Carcase Assembly

It is 10 times easier to screw Blum drawer runner slides onto the cabinet sides while the panels are laying flat on your bench!

Use the pre-drilled System 32 pilot holes on the side panels. Once runners are secured, proceed to join the base, top rails, and solid back.