ᐅ Corners of Kallax units chipped – how to reinforce them?

Created on: 7 Dec 2022 08:14
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LISGAU45
Hello everyone,

I recently noticed that some of the corners on my Kallax shelving unit have broken off. More specifically, these are the inner edges at the joints between the individual shelf compartments. This loss of stability is frustrating, as it weakens the unit and affects its appearance.

My question is: What is the best way to reinforce these broken Kallax corners? Are there practical and discreet repair methods that will hold up over time? It is important to me to avoid fully disassembling the shelf or doing major modifications. A solution using readily available materials would be ideal.

I would appreciate any advice on repair materials, techniques, or sustainable reinforcements!
L
LISGAU45
7 Dec 2022 11:15
Hector schrieb:
What exactly is the scenario – what is stored in the affected compartments? Heavy items or more decorative objects?

Thanks for the follow-up, very good point. The compartments are filled with medium-weight books – no heavy binders, but fairly solid contents. The shelves were also shifted slightly, and there seems to have been some draft in the corners, which contributed to these damages.

I am aware that the stability of even Kallax units depends on the corner construction, but the corners are damaged. My goal is to restore as much stability as possible through reinforcement with a repair, without completely replacing everything or investing too much effort.
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Fitigu
7 Dec 2022 11:50
For repairing chipped Kallax corners under moderate load, the following procedure is recommended:

1. Clean the damaged areas from dirt and dust.
2. Fill the broken edges with waterproof wood glue (photovoltaic system) and, if necessary, Micros-Plug or wood filler to restore the shape.
3. After drying, lightly sand the surface.
4. For effective stabilization, small solid wood strips should be glued inside and fixed with screws (pre-drilled).
5. As additional reinforcement, flat metal brackets can be installed on the inside of the breaking edges.
6. Check the back panel: If it is thin or loosely attached, it should be replaced with thin MDF panels or additionally secured.

This method ensures a sturdy stabilization and maintains solid load-bearing capacity. Wood glue combined with mechanical reinforcement is the key.
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dijan
7 Dec 2022 12:04
Hi!

My favorite trick for this kind of thing is to use wooden wedges that you cut yourself. You can glue them neatly into the gap, which fills the space and creates a solid support surface that can then be secured with brackets or screws.

Not only does it look sturdy, but it feels solid too.

And hey, if you want a pro tip: especially with Kallax units, it’s worth adding metal edge protectors on the inside. This way, the corners are much less likely to get damaged later, and you get a clean finish. 😉
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plopra
7 Dec 2022 12:27
Apply wood glue and then immediately attach reinforcement brackets on the inside.

If possible, pre-drill the screws to prevent the edges from splitting further.
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Wesley
7 Dec 2022 13:10
Fitigu schrieb:
Furniture glue combined with mechanical reinforcement is the key.

I couldn’t agree more! Plus: don’t be afraid of screws – a few properly placed screws often hold better than brush strokes of glue alone.

And if you want to keep the repair looking neat, you can cover the brackets inside with caps or small veneer patches.

Kallax is basically a cool modular system, but it’s also prone to weakness at the joints – which makes it all the more important to look behind the scenes and boost its stability! 🙂
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derrick34
7 Dec 2022 16:45
Be careful with cheap screws, as they are more likely to break when used with chipboard. It is better to use thin, short wood screws.