ᐅ Why do BILLY shelves only start squeaking after extended use?

Hello everyone, I have noticed something that puzzles me a bit: my IKEA Billy shelves don’t start squeaking immediately after assembly, but only after some time of use, usually several weeks or months. I am particularly interested in the physical or mechanical reasons behind this. Why do Billy shelves typically develop this squeaking noise only after a longer period? Is it related to the material properties, the fasteners, or the load? I suspect it might be connected to the settling of the wooden parts or small movements within the shelving unit under load, but I would like to hear a more detailed explanation. Has anyone else had similar experiences or knows about this phenomenon from a technical perspective? Thanks for your insights!

This is an interesting topic, thanks for starting the thread! I didn’t notice anything at first either, but after a few months my BILLY shelf started squeaking occasionally, especially when I put weight on it or when the humidity was high.

I suspect this is due to some sort of “material fatigue” or loosening of the joints that becomes noticeable through use. Fluctuations in humidity and temperature might also cause the wood to expand and contract slightly, which can lead to some movement in the small screws or press-fit connections.

For me, it’s important not to give up just because of the noise. Maybe tightening the screws or lubricating the contact points with a suitable agent could help? Has anyone had experience with this?

Goritar schrieb:
Why do BILLY shelves typically develop this squeaking mechanism only after a longer time?

I think this period of use brings small changes that only become noticeable after several weeks.

Hello Goritar and all interested,

I would like to offer a structured explanation of why BILLY shelves, and actually many furniture pieces made from wood-based materials, only start to squeak after some time:

1. Material wear and load: The shelf is usually made from particleboard or MDF with a melamine coating. Under load, the fibers can slowly compress, or micro-cracks can cause movement at the joints.

2. Moisture influence: Wood-based materials absorb and release moisture. This causes slight changes in volume, leading to tension and friction at the screws or connections.

3. Connection technique: The BILLY cam lock or dowel joint is not as rigid as solid wood joints. Over time, small connections loosen, which can cause movement despite the screws being tightened.

4. Usage: Constant loading, unloading, or slight movements from doors or shelves cause friction losses that are initially invisible but become noticeable after weeks.

In summary: The quiet squeaking is caused by a combination of material properties, environmental factors, and mechanical stress. Better maintenance, such as gently retightening screws or applying lubricant at contact points, can reduce the noise.

Hope this helps you a bit!

In addition to what Jensson has written, I would like to add some details about the exact mechanical background:

The squeaking is usually a classic result of friction between two solid surfaces, in your case often wood particle boards, which shift slightly against each other. This movement does not happen immediately but only after a certain "break-in period" during everyday use, when the shelf has been loaded several times.

Furthermore, the pressure conditions at the screws and dowels change when the shelf slightly shifts, for example due to temperature or humidity. This can cause a temporarily increased pressure at a specific point, which then causes the wood to creak when moved.

To keep the shelf permanently quiet, you can try the following:
- Regularly check and tighten screws
- Lightly treat contact surfaces with wax or wood oil to reduce friction
- Especially with older BILLY shelves, it can help to realign the back panel, as warping often leads to noises

Jensson schrieb:
Better maintenance, such as lightly tightening screws or applying lubricant at the contact points, can reduce the noises.

That’s correct, you can actively counteract it this way.

Briefly to the point: BILLY shelves squeak because engineered wood materials expand and contract slightly over time, causing the joints to move minutely. Tightening the screws and applying a little lubrication usually helps. This does not happen immediately because the components need to adjust to temperature and stress first.

I would add that the assembly hardware from IKEA is often not designed for permanent movement. The screws and wall plugs are relatively soft, which, combined with wood deformation, can lead to slight movements and therefore noises. It simply takes time for everything to settle in.