ᐅ Why do the screw connections in BILLY shelves loosen over time?

Hello everyone,

I have a question that has been on my mind for some time and that I have also noticed with several BILLY shelves: Why do the screw connections in BILLY shelves keep loosening over time? I’m not only referring to screws that are loose immediately after assembly, but a gradual, continuous loosening of the screws that I observe after several months and years, even with careful handling.

I assume that various factors play a role, such as material properties, loads, or environmental influences. Does anyone here have specific experience or well-founded explanations as to why the screw connections in BILLY shelves do not stay firmly in place permanently, even though the furniture is designed for everyday use?

I look forward to your assessments and tips on how to solve this problem in a lasting way.

The primary cause of the screws losing their holding strength in BILLY shelves lies in the combination of the materials used and mechanical stresses.

On the one hand, the joints are often made from materials such as particleboard or MDF, which gradually lose strength under repeated stress or slight vibrations, causing the threads to no longer hold securely. As a result, screws can loosen over time.

Secondly, transverse and vertical forces act on the screw connections due to the load on the shelves, causing slight movements. These micro-movements in the threads inevitably lead to loosening.

Finally, fluctuations in temperature and humidity indoors can also affect the joints, as materials expand and contract differently. This promotes a continuous process of tightening and loosening.

My recommendation: After assembly, regularly retighten the screws and, if lasting stability is desired, consider using thread-locking adhesive.

The screws loosen because the wood in the shelf expands and contracts as it adjusts.

Additionally, daily loading and minor vibrations in the room cause small movements that gradually loosen the screws.

Simply tightening them again usually helps.

RETRAVIS schrieb:
Temperature and humidity fluctuations indoors affect the joints

I can confirm this from my own experience! In my apartment, the humidity varies significantly between winter and summer. With my BILLY shelf, I also noticed that the screws loosen over time and had to be tightened frequently. At first, it was really annoying, but after I started monitoring the weather, it has improved.

I think it’s important not to doubt the stability of the furniture right away but to consider these natural processes.

meoreo schrieb:
Simply tightening usually helps.

Exactly, and it’s a good idea to remember to do it regularly so nothing wobbles or gets worse. 🙂