Hello everyone, I have been wondering for some time why the screws in IKEA’s BILLY shelves tend to loosen over time. I’m not referring to screws being tightened too loosely, but rather that the screws seem to gradually come loose after weeks or months despite normal use and without noticeable stress. I suspect that the material or the type of joint might play a role. Does anyone have experience with whether this is related to the shelf’s construction or possibly to various environmental factors? Is this a known issue with BILLY, or is it more likely due to the assembly? I would appreciate detailed explanations and possibly some technical background so I can better maintain or reinforce my shelves.
Good question, Lubujo! The phenomenon of screws loosening over time in BILLY shelves has several causes. First: BILLY shelves are mainly made of particleboard or similar engineered wood materials, which do not allow a strong, long-lasting hold for screws because the material slightly compresses or deforms over time. Second: The shelf construction often relies on wood or chipboard screws with limited thread depth, which restricts their grip.
This is exactly the key: slight movements, temperature fluctuations, and humidity cause the materials to expand and contract slightly. This leads to screws gradually loosening. Another factor is the so-called “creep effect” of particleboard, which causes slow compression or expansion.
My advice: always tighten screws with the appropriate torque and, if needed, use glue or a special threadlocker that isn’t too strong but prevents screws from loosening again. By the way, occasionally retightening the screws can be helpful.
Lubujo schrieb:
that the screws apparently begin to loosen slowly after weeks or months, despite normal use and without noticeable stress.
This is exactly the key: slight movements, temperature fluctuations, and humidity cause the materials to expand and contract slightly. This leads to screws gradually loosening. Another factor is the so-called “creep effect” of particleboard, which causes slow compression or expansion.
My advice: always tighten screws with the appropriate torque and, if needed, use glue or a special threadlocker that isn’t too strong but prevents screws from loosening again. By the way, occasionally retightening the screws can be helpful.
I would like to explain this in more detail because many people often worry about such issues. As klo40 has already explained well, the loosening of screws in BILLY shelves mainly results from the characteristics of the material, especially since particle boards can easily swell or shrink due to sensitivity to moisture.
This natural process causes the screws not to stay tight. I also recommend working carefully during assembly—do not overtighten the screws, as this can cause the material to crack, but also avoid leaving them too loose. One option is to use washers or even special thread-locking compounds that help prevent screws from loosening again later.
For those worried that the shelf might become unstable: regular checking and gently retightening the screws is usually sufficient to maintain long-term stability.
klo40 schrieb:
Temporary movements, temperature fluctuations, and humidity cause the material to expand and contract slightly.
This natural process causes the screws not to stay tight. I also recommend working carefully during assembly—do not overtighten the screws, as this can cause the material to crack, but also avoid leaving them too loose. One option is to use washers or even special thread-locking compounds that help prevent screws from loosening again later.
For those worried that the shelf might become unstable: regular checking and gently retightening the screws is usually sufficient to maintain long-term stability.
I question the sole blame on the material here. Sure, the particle boards have their weaknesses, but I believe the type of screw connection and the assembly process are at least equally important.
Many manufacturers actually recommend tightening screws with a specific torque and in a particular sequence to evenly distribute the stress. Whether IKEA specifies this or relies on a simpler guideline, I don’t know.
Furthermore, screws themselves have material properties (e.g., thread pitch, surface finish) that can introduce variability. If screws are not installed with some form of locking mechanism or at least the proper preload, they are known to loosen over time due to vibrations or slight movements.
My analysis: It is a combination of material, screwing technique, and usage. Anyone aiming for long-lasting stability should consider enhancing the system with additional connectors or suitable screws.
Lubujo schrieb:
Is this a known issue with BILLY, or is it more about the assembly?
Many manufacturers actually recommend tightening screws with a specific torque and in a particular sequence to evenly distribute the stress. Whether IKEA specifies this or relies on a simpler guideline, I don’t know.
Furthermore, screws themselves have material properties (e.g., thread pitch, surface finish) that can introduce variability. If screws are not installed with some form of locking mechanism or at least the proper preload, they are known to loosen over time due to vibrations or slight movements.
My analysis: It is a combination of material, screwing technique, and usage. Anyone aiming for long-lasting stability should consider enhancing the system with additional connectors or suitable screws.
I completely understand the frustration when screws keep coming loose. I experienced this myself several times with my BILLY shelves, especially because I often move or load them heavily.
I think that sums it up quite well. In my opinion, it’s important not to get discouraged and to keep in mind that this type of furniture isn’t professional carpenter assembly. What helped me was going over all the screws after a few months and applying a small drop of threadlocker if needed. That gave me more peace of mind.
Also, I would strongly recommend not to overload the shelves, even if they look very sturdy. Sometimes securing the shelves safely to the wall helps as well – this relieves the stress on the screws within the shelf and improves overall stability. I hope these tips help others who are as frustrated as I was! 🙂
dinano schrieb:
It’s a combination of material, screwing technique, and usage.
I think that sums it up quite well. In my opinion, it’s important not to get discouraged and to keep in mind that this type of furniture isn’t professional carpenter assembly. What helped me was going over all the screws after a few months and applying a small drop of threadlocker if needed. That gave me more peace of mind.
Also, I would strongly recommend not to overload the shelves, even if they look very sturdy. Sometimes securing the shelves safely to the wall helps as well – this relieves the stress on the screws within the shelf and improves overall stability. I hope these tips help others who are as frustrated as I was! 🙂
Similar topics