ᐅ After the attic conversion, the KALLAX no longer fits into the niche – should it be shortened?

Hello everyone,

I am currently facing the following problem: After our loft conversion, the niche where our KALLAX shelving unit used to fit is unfortunately no longer wide enough, so the furniture no longer fits there. The width of the niche has decreased by about 5 cm (2 inches) due to changes in the roof slope and interior walls. The shelving unit itself is made of relatively rigid panels, and I am wondering if it would be reasonable and safe to shorten the KALLAX in width to continue using it. Has anyone had experience with this kind of modification? Are there any risks regarding stability or appearance that I should consider? Or would you rather recommend getting a new, custom-sized piece of furniture? Any opinions and advice are welcome!

In principle, it is possible to shorten KALLAX shelves, but the risk is that the connection between the individual shelf sections may be compromised. The best approach is to shorten the side panels and adjust the back panel accordingly. Make sure to work carefully to maintain stability.

INGRID34 schrieb:
It is possible to shorten KALLAX shelves, but the risk is that the connection between the individual shelf parts may be compromised.

To elaborate on this topic in more detail: The KALLAX shelving unit from IKEA is actually made of medium-density fiberboard (MDF) with a melamine coating, which results in a fairly sturdy construction, but mechanical modifications to the carcass are quite risky. Especially when shortening the side panels, you usually lose the original holes for the shelves, which requires drilling new ones and may jeopardize dimensional accuracy.

Another point: The back panel is usually only nailed or stapled on. If it is cut shorter, it also needs to be reattached to ensure long-term stability.

Therefore, I recommend taking precise measurements before starting and, if necessary, using a jigsaw while paying attention to the material. Have you already checked if you can adjust the niche afterward in another way? Or would there be a possibility to get a similar but more suitable model?

More information about your construction and intended use would be helpful to give more accurate advice.

I think if the KALLAX already fits well and you want to keep using it, you can carefully cut it to size with some basic DIY skills. 😉

dilucas schrieb:
Are there any risks regarding stability or appearance that I should watch out for?

Visually, it could look a bit untidy if the edges aren’t properly finished or painted. You can compensate for stability with extra brackets or small wooden strips at the ends. Of course, it won’t be completely original anymore, but with some attention to detail, it could look really great!

Cutting down the KALLAX shelf unit typically involves modifying the side panels and resealing the edges to prevent moisture damage and fraying. It is important to reattach the shelves at the correct spacing and ensure the back panel is securely fixed to avoid warping.

Technically, this is feasible, but it will void the manufacturer’s warranty. For stability, reinforcing with angle brackets or metal profiles can be advisable, as the original load-bearing capacity is reduced after cutting.

If the shelf will be heavily loaded or high stability is required, I definitely recommend a custom-made solution tailored precisely to the niche dimensions.

I can confirm the recommendation for additional reinforcement. Furthermore, the appearance can be significantly improved with edge protector strips available at hardware stores. These come in various finishes and also add stability. Sanding the cut edge before applying an appropriate paint is important to make the surface more durable.

Finally, you should only attempt shortening if you have some experience using woodworking tools and can work precisely.