ᐅ Is there a guide for building an IKEA BESTA as a lowboard with reinforcement?

I am planning to use my existing IKEA BESTÅ system as a lowboard and am looking for reliable guidance or recommendations on how to reinforce this piece of furniture so it can safely support heavy equipment like TVs and sound systems. The standard BESTÅ modules are usually not designed for high loads, and I want to avoid any sagging or instability in the lowboard. Are there proven methods to make the shelving unit more stable, for example with additional reinforcements, braces, or other measures? I am particularly interested in detailed instructions or step-by-step tips that go beyond general advice. If anyone has personal experience or technical insights regarding the materials and connection types (screws, metal brackets, etc.), I would greatly appreciate it.

This topic is really interesting and important because I myself hesitated for a long time before using my BESTÅ as a lowboard. I’m familiar with the concern that it might not hold up. Basically, I’ve had good experiences reinforcing the cabinet with additional metal brackets inside at the back to stiffen the structure. Installing a continuous solid wood panel on top can also help. However, this is not a DIY project for everyone, especially if you want to maintain the original appearance. How far along are you with your renovation?

Metal brackets on the sides and a central support beneath the cover plate are usually sufficient for increased stability. Adjustable feet or a wooden batten as a central brace can also help.

Here is a brief guide to reinforcing your BESTÅ lowboard:

- Remove the back panel, as the standard back is often just a thin MDF board
- Install a 5–8 mm (0.2–0.3 inch) plywood sheet as reinforcement from the rear and secure it with screws and wood glue
- Use metal brackets in all corners of the shelves for increased long-term stability
- For the top, it is often sufficient to add an extra wooden board (e.g., beech plywood, about 18 mm / 0.7 inch) and screw it firmly in place
- Install a central support beam to distribute the load and prevent sagging

Common mistakes:
- No additional back panel or bracing
- Only using dowels without screws

This method works quite well for me and supports solid TVs and soundbars.

Nabla64 schrieb:
- Remove the back panel, the standard back panel is often just a thin MDF board

That’s a really good tip, thanks! I was wondering if changing the back panel makes sense since the piece should at least help improve stability against warping. Are there differences in the panels between the BESTÅ versions? And is plywood significantly more stable than MDF when used as a back panel?

neoren schrieb:
Screw-in feet or a wooden batten as a center brace can also help.

What’s the best way to attach a center brace? Using threaded rods through the furniture or simply screwing it from underneath?

Plywood is more stable and less prone to breakage than MDF, that’s true. For the central support: simply secure it from underneath with long wood screws. Threaded rods are unnecessarily complicated.