ᐅ My KALLAX unit is not aligned flush with the next one – how can you compensate for this?

Hello everyone,

I hope someone here can help me with my problem. I have assembled several KALLAX shelving units side by side, but they don’t align perfectly. Specifically, the side panels of the individual units are not fully flush, and there are small gaps or offsets of a few millimeters (inches) between the modules. This looks quite untidy, especially with multiple units in a row, and I wonder how to compensate for these irregularities.

Unfortunately, I don’t have any real braces or special connectors—I’m only using the standard screws and dowels that came with them. Are there any practical tips for achieving flush surfaces? Should I use small shims or spacers, perhaps? Or does anyone know specific techniques or IKEA hacks to fix this kind of issue?

I’d appreciate any advice since I want the shelving to look neat and well-aligned. Thanks in advance!

Hello tauti,

First of all, a big compliment for your clear and detailed question – that makes it much easier for us to help you!

Your description of gaps and misalignment between the KALLAX units is a common issue during assembly, especially when the units are placed directly next to each other without being properly connected.

There are several ways to compensate for this:

1. Connecting brackets/fasteners: Ikea usually provides small brackets (fasteners) for KALLAX that can be attached to the inner edges of the units. These ensure a secure fit and press the units together.

2. Pads and shims: Small felt pads or thin material placed under the units can help if the floor itself is not completely level.

3. External screws: If you’re comfortable with some DIY, you can screw the units together from the back to close the gaps.

4. Readjusting the connections: Sometimes loosening the screws, aligning the units, and then tightening the screws again helps. Especially with multiple units, it’s best to proceed step by step.

If you want, I can also provide you with a step-by-step guide.

Good luck with it! 🙂

Jeanbar schrieb:
Connector brackets/joiners ... ensure a secure fit and press the modules together.

That’s correct, and I’d like to add that when using connector brackets, it’s important to tighten the clamping screws evenly and not too tightly. This helps prevent deformation of the panels, which could otherwise make the problem worse.

tauti schrieb:
… sometimes there are small gaps or offsets of a few millimeters between the modules.

In that case, I would recommend checking the base first. Unevenness in the floor is often the cause. The best way to measure is with a spirit level. If the floor is uneven, placing small wedges or felt pads under the modules can help align the shelves evenly.

Also, when assembling, you should make sure that the side panels of the modules are positioned as precisely as possible – sometimes it helps to place the modules side by side on a flat floor before final assembly to minimize any offset.

An important tip: For modules set at corners or directly adjacent to each other, an additional connection point between the modules is advisable. For example, self-adhesive edge protection strips or thin wooden strips can be installed to act as a buffer and visually mask the gap.

How did you join the individual modules? Did you use the standard connectors or other components? It would also be interesting to know how stable the entire structure is – are the modules fixed or just loosely placed?

Hello tauti,

I would like to offer you a structured approach to solving the issue of the KALLAX units not sitting flush.

Introduction:
The problem with misaligned units is often caused by a combination of uneven floors, manufacturing tolerances of the units, and the assembly method. When the units are placed side by side, even the smallest deviations cause visible gaps.

Step 1: Check and level the floor
- Use a longer spirit level to check the floor’s flatness.
- Any unevenness can be compensated with small wedges, rubber pads, or felt glides under the feet.

Step 2: Position the units temporarily side by side
- Place the units on the leveled floor and align them carefully.
- Make sure the edges are as straight as possible.

Step 3: Connect the units
- Ikea offers corner connectors or special unit connectors that you can use on the inside edges for assembly.
- If your units don’t have built-in connectors, get universal connectors or small brackets and screw them in from the back.

Step 4: Final adjustment and securing
- First, tighten all connecting elements slightly, then realign, and finally tighten firmly.
- If needed, you can glue thin wooden panels or hardboard strips on the contact surfaces to compensate for small unevenness.

Summary:
The most important factors are a level floor and clean connections between the units. When in doubt, make several small adjustments rather than tightening everything at once.

I hope this guide helps you. If you have any questions, feel free to ask!