ᐅ Why are some Billy doors crooked after installation?

Hello everyone, I recently assembled a Billy bookshelf, but I noticed that the doors are hanging unevenly. I am particularly interested in understanding why this happens, even though the instructions were carefully followed.

I suspect it has something to do with the installation or the fixing of the door hinges, but it would be helpful to understand which common mistakes or mechanical factors are usually responsible.

Are there also differences between various Billy construction versions or models that could contribute to this problem? I would appreciate detailed answers so I can fix the issue with my bookshelf.

Usually, the hinges are not installed at exactly the same angle, or the dowel holes are drilled slightly off-center. This alone can cause the door to hang unevenly.

Also, the screws should not be tightened too much, as this can affect the adjustment.

teope schrieb:
I'm mainly interested in why this happens even when the instructions are followed carefully.

This is actually a common issue that can occur despite following the instructions because the tolerances of the pre-drilled holes and hinges often allow for a small amount of play. This play can add up during assembly, causing the doors not to hang perfectly parallel.

It is also important to align the shelves precisely level before mounting the doors. If the cabinet frame is already slightly warped or uneven, any inaccuracies in hinge installation will have a much greater impact.

Additionally, there are differences between the classic Billy shelves made from solid wood-like material and newer versions with thinner panels – the latter are more prone to warping under load and with moisture.

Did you assemble the shelving unit against a slightly uneven wall or on an uneven floor? That can also worsen the problem.

danial60 schrieb:
This is indeed a common issue that can occur despite following the instructions, because the tolerances of the pre-drilled holes and hinges often allow for a small margin of error.

It’s interesting that we treat this simply as a 'margin of error.' I would argue that the problem is more fundamental, and that IKEA produces cheaply to keep costs low, with precision unfortunately not being a top priority.

Anyone who has ever assembled something carefully and critically knows that certain inaccuracies are inevitable. Of course, with the right technique you can compensate to some extent, but perfect alignment is rarely achieved.

I think many people are misled by the instructions and expect perfection where no such quality guarantee is given.

teope schrieb:
Are there differences between various Billy construction variants or models that could contribute to this problem?

Yes, there are significant differences in stability and component tolerances among the variations of the Billy shelf, for example in width, height, and door design.

Also, it is often the plastic or metal hinges with built-in adjustability that play a crucial role. If these are not installed or adjusted precisely, misalignments quickly become apparent.

My tip: After assembly, patiently adjust the doors using a screwdriver. Most hinges offer three adjustment directions (height, lateral, and depth).

By the way, a level surface for the cabinet is essential—without that, even technically good hinges will struggle.