ᐅ Who has tested stabilization with aluminum profiles on KALLAX?

Hello everyone,

I am currently planning to reinforce my KALLAX shelf unit, as I mentioned that it can sometimes wobble under heavier loads. I came up with the idea of stabilizing the frame additionally using aluminum profiles.

Have any of you already tested stabilization solutions with aluminum profiles on the KALLAX? I am particularly interested in how you implemented it, which profiles you used, how you attached the profiles to the furniture, and what effect you achieved.

It would also be great to know whether the effort is worthwhile or if there might be other effective and simple alternatives to make the cabinet more resistant to bending.

I appreciate any constructive advice!

fjum10 schrieb:
Who here has already tested stabilization solutions using aluminum profiles with the KALLAX?

Hello fjum10,

A few months ago, I reinforced my KALLAX using aluminum profiles to reduce the typical “wobbly” feeling when it is heavily loaded.

I used relatively flat but sturdy aluminum profiles, which I screwed to the inside of the back panel. It was important to me that the profiles were not too thick, so the drawers could still slide in and out smoothly.

I attached them with small brackets and suitable countersunk screws. This keeps the construction slim but significantly increases stability against twisting and tipping.

The result: The shelving unit is now noticeably more stable and barely shifts, even when I place heavy items on one side. The whole process took about 2 hours, including marking and drilling.

If you want details about the profile thickness or screws, feel free to ask.

I can fully confirm BiDennis’s tip. The aluminum profiles on the back really make a noticeable difference. It’s important to cut the profiles as precisely as possible and pre-drill holes. This helps prevent material cracks and ensures proper force distribution.

Additionally, I placed small plastic feet under the points where the shelf stands on the floor, which also help increase stability and reduce wobbling.

Alternatively, flat metal connectors can be used – but these are usually more expensive than aluminum profiles and involve more effort. My recommendation: aluminum profiles offer a good balance between effort, cost, and effectiveness.

I did the same. I use 20x20mm (0.8x0.8 inch) aluminum square profiles and screw them from the inside onto the frame. It works great, especially to prevent lateral bending. I can recommend this method.

BiDennis schrieb:
Flat but sturdy aluminum profiles screwed to the inside of the back panel.

I wonder if the aluminum profiles alone are sufficient to make the KALLAX significantly more stable. Prolonged stress or point loads could strain the profiles over the years – how does the connection between the aluminum profile and the wood hold up in these cases?

Are additional reinforcements or special joining techniques necessary here to prevent long-term deformation or even loosening of the screws?

benon schrieb:
Plastic feet under the shelf also help to increase stability.

That’s an interesting and often underestimated point – the contact between the base and the floor strongly influences overall stability. It might be worthwhile to also use suitable corner brackets to tie the frame together.

One aspect I would like to add is the arrangement of the aluminum profiles. Instead of attaching them only to the back, you can also install them crosswise inside the structure as an additional brace.

This significantly increases the torsional rigidity.

However, you need to be careful not to block any drawers or inserts, so careful planning beforehand is essential.

I also wonder if combining aluminum profiles with additional glued and screwed joints at the corner edges would provide even greater stability. Using profiles alone offers purely mechanical reinforcement but does not relieve stress from the main load-bearing connections themselves.