ᐅ What should you do if the floor under a BILLY shelf is unstable?

Hello everyone,

I have a BILLY bookshelf from IKEA standing on a floor that feels a bit loose in one spot – the floor feels unstable and slightly flexible there. Because of this, the bookshelf’s stability is affected; it wobbles slightly and doesn’t stand completely firm.

My specific question: What practical and long-lasting measures can be taken to deal with a loose floor under a BILLY bookshelf? I am interested in both short-term and permanent solutions. For example, should I modify the base of the bookshelf, level the floor, or is it better to use additional fastenings? I would appreciate any well-founded advice, including recommendations for materials or products that have proven effective.

Best regards!

Hello,

I would either use wedge-shaped spacers under the feet or level the area with wooden shims. Sometimes felt pads also help if there is just a slight wobble. If the floor is too soft, you can also place a thinner plywood board underneath to stabilize the shelf.

The floor under the BILLY shelf should be as stable as possible, since the shelf itself is a relatively lightweight structure and can actually deform on uneven or loose flooring.

A common and effective method is to level it using self-adhesive furniture wedges or pads made of durable plastic or wood. These compensate well for minor unevenness and improve stability.

For larger holes or unstable floor areas, waterproof plywood panels such as multiplex are recommended, which can be cut to size and placed under the shelf.

Pro tip: Before leveling, it can help to fit rubber or silicone stoppers at the points where the shelf feet contact the floor. This further reduces slipping and absorbs small vibrations.

The latter is especially important if the shelf is also holding elements with books, to distribute the load evenly.

Maria35 schrieb:
A common and effective method is to level furniture using self-adhesive furniture shims or pads made of sturdy plastic or wood.

Many people may agree, but I believe this only treats the symptoms, not the root cause. Uneven flooring under a piece of furniture usually indicates that the subfloor is simply unsuitable. Furniture should be placed on a stable, level surface—no amount of shims or pads will fix that.

So why not properly renovate the floor or at least prepare it better before placing furniture that might eventually get damaged? Although more labor-intensive, this approach is more sustainable. Temporary solutions with shims often lead to new issues, such as mold under panels or damage caused by moisture.

In short: I think you shouldn’t improvise with IKEA property but rather undertake real structural measures. But hey, that’s just my radical view ;-)

GALEO4 schrieb:
So why not properly renovate the floor or at least prepare it better before placing furniture

I agree with this, but I also understand that not everyone has the time or resources to undertake a full floor renovation right away. In such cases, simple solutions like wooden shims or furniture sliders can be a practical temporary fix to reduce frustration caused by wobbly furniture.

I think this topic is important because the impact of an uneven floor on comfort and safety is often underestimated. If your shelf wobbles in one spot, it might also help to secure the shelf to the wall, if that hasn’t been done already.

This adds stability and has personally saved me from items falling over. And if you choose furniture shims, make sure to select materials that are non-slip and resistant to moisture.