ᐅ KALLAX shelves coming loose after years – how to reattach them?

Hello everyone,

I have an IKEA KALLAX shelving unit that I have been using for about 7 years. Recently, I noticed that some of the shelves are starting to come loose, the joints no longer seem stable, and the whole unit feels a bit wobbly. I suspect that the original dowels and adhesive connections have weakened over time, or that the material has slightly warped.

My question is: What is the best way to reattach the loose KALLAX shelves without taking the entire unit apart or cutting new boards? Are there proven methods, adhesives, or special dowels that work well to secure the shelves safely and permanently?

I want to make as few changes to the original construction as possible, since the unit is otherwise still in very good condition. Has anyone experienced similar KALLAX repairs and can share tips on how to restore its stability? Any advice or instructions would be much appreciated!

Fate48 schrieb:
How can I best reattach the loose KALLAX shelves without taking the whole unit apart or cutting new boards?

Hi Fate48, the KALLAX is definitely a classic at IKEA, but after a few years wear and tear naturally shows. 😊

I would suggest gently removing the loose shelves from the compartments first – don’t worry, you can often take the boards out without much effort.

Then apply a thin layer of wood glue (preferably waterproof PVA glue or something similar) on the dowel holes, and secure the wooden dowels and edges again with small clamps.

Tip: Applying some pressure while drying significantly improves the bond strength. If you don’t have clamps, two sturdy books or heavy objects, ideally placed evenly, can work as well.

It’s important that the surfaces are clean and the glue is applied in a thin layer; otherwise, the shelf might not fit perfectly.

If you want to avoid disassembling the entire unit, this method works very well with a bit of patience. Afterwards, the shelves are often just as stable as before. 🙂

leomo schrieb:
I would recommend carefully removing the loose shelves from the compartments first

Good idea! Additionally, I would suggest a simple step-by-step process:

1. Empty the shelf compartment and carefully remove the board. Pay attention to how the shelf is positioned so you can reinstall it correctly later.

2. Check the wood joints – often only the dowel holes are worn out. If so, you can mix wood glue with a little sawdust and fill the holes for better adhesion.

3. Use high-quality water-resistant wood glue (e.g., Ponal Express) for the joints and dowel connections – not too much, to avoid squeeze-out.

4. Reinsert the shelves and secure them with clamps or heavy objects until the glue is fully dry (usually 24 hours).

5. For extra stability, you can install small metal brackets at the back if you don’t plan to change the shelf’s appearance.

A common mistake is to use the furniture too quickly after gluing – the wood glue needs time to set. Good luck!

Fate48 schrieb:
the shelf feels a bit wobbly

Interesting observation, but I would suggest looking more closely at the reason for the loose shelves. Is it really the wall plugs, or could it be due to material deformation from moisture or heavy load?

A superficial attempt with just glue is only a temporary fix, because if the wooden panels are warped, the problem will reoccur.

Also consider whether the shelf has been frequently moved or repositioned, as this puts more strain on the joints.

leomo schrieb:
wood glue and clamps

That sounds practical, but without checking the overall stability, it is not sufficient. In the long term, I recommend also checking if the back panel is still tight, as it plays a big role in stability.

Despite everything—a repair is worthwhile because the KALLAX material is quite high quality and the individual shelves are rather heavy to replace.

Board out, remove old glue residues, apply wood glue, clamp together, let dry. Done.

LuMarcel43 schrieb:
If the wooden boards are warped, the problem will occur again

This is an important point. I recommend carefully checking the fit of the shelves before gluing. For example, ensure the edges sit flush and there are no excessive gaps.

Here is a brief procedure for optimal results:

1. Carefully remove the shelves from the unit.
2. Clean the joint areas of dust or old glue.
3. Check if the shelves are flat – for slight warping, you can carefully sand them with fine-grit sandpaper.
4. Apply wood glue thinly on both joining surfaces.
5. Reinsert the dowels (if possible) and reinstall everything.
6. Then clamp the assembly with clamps (or alternatively, place weights on it).

If the back panel no longer fits without tension, it should also be replaced or re-tensioned, as it significantly contributes to the overall stability.

Once everything is dry, reassemble the shelf and test its stability before applying any load. This helps prevent further damage :-)