ᐅ Are there any tips for attaching the back panel to an Ikea PAX wardrobe?

Hello everyone,

I recently assembled an Ikea Pax wardrobe and now I’m facing the issue of how to properly secure the back panel. These back panels are usually quite thin and fixed only with small nails. My question is: Are there any good tips or tricks to ensure the back panel stays firmly in place, without gaps forming or warping?

I would like to avoid the wardrobe becoming unstable over time or the back panel coming loose. So far, I have only used the supplied nails, but I feel this is not ideal. What materials, tools, or techniques would you recommend?

Has anyone had experience with alternative fastening methods, such as screws, double-sided tape, or special mounting strips?

Thanks for your help!

kinel0 schrieb:
Are there any good tips or tricks to make sure the back panel holds securely, with no gaps and no warping?

Hello kinel0,

I can share some experience since I have assembled many Ikea PAX wardrobes and reinforced the back panels. The original nails are really only meant to hold the panel in place temporarily and do not provide lasting stability or reliably prevent warping.

Here is the procedure I recommend:

- First, align the back panel fully and press it smoothly into the groove of the frame.
- Instead of the original nails, use small stainless steel nails with a thinner head. This helps avoid chipping.
- Alternatively, you can use fine screws (e.g., 3x15mm (1/8 x 5/8 inches)) screwed nearly parallel to the back panel directly into the frame. This requires some care to avoid splitting the material.
- A useful trick is to reinforce the corners of the back panel with thin double-sided mounting tape. This reduces the chance of warping.

It is important to assemble the wardrobe straight and level so the back panel is not under tension. Even if you clamp the back panel loosely, it can warp over time.

Feel free to let me know whether you plan to fix the wardrobes to the wall or place them freestanding — that also affects the stability of the back panel.

I’m happy to provide more detailed advice if you share the dimensions or type of backing material you are using.

I always use small nails specifically for thin back panels and place them every 10-15 cm (4-6 inches). Screws are too large and often tear through the back panel.

kinel0 schrieb:
Does anyone have experience with alternative fixing methods, such as screws, double-sided tape, or special mounting rails?

The issue with backing panel installation on Ikea PAX systems is usually a bit problematic because the thin material almost always expands or detaches slightly if the fixing isn’t done optimally.

If you have some DIY skills, I’d recommend replacing the nails with very fine metal pins and gently driving them in evenly with a hammer. Maintaining an even spacing is important, about every 10cm (4 inches) along the edges.

Another option is small-headed screws, provided you pre-drill pilot holes with a thin drill bit to avoid splitting the material. This gives a secure fixing without too much stress on the panel.

Double-sided mounting tape can be helpful as a supplement but doesn’t replace mechanical fasteners. It also slightly reduces the gap between the cabinet and the wall, which can sometimes interfere with connections.

It’s also important to align and level the cabinet precisely before attaching the backing panel so that the panel lies flat. If you attach the panel crooked or under tension, it will warp sooner.

One more tip: some people use MDF panels 3–4mm (1/8–5/32 inches) thick instead of the thin particleboard backing. These are more stable but often need to be cut to size. You can also fix these better with screws, which adds overall stability.

Could you share the exact size and thickness of your backing panel? That would help me provide more specific advice.

BENBI schrieb:
Let me know if you attach the cabinets to the wall or leave them freestanding – that also makes a difference in the stability of the back panel.

I agree with that. Wall attachment is extremely important for stability, especially with larger PAX cabinets. If you only fix the back panel using the supplied nails and leave the cabinet freestanding, the back panel can quickly warp or come loose.

My recommendation:

- Always secure the cabinet to the wall using the included brackets (ideally into concrete ceiling or solid masonry).
- Use additional small nails or pins for the back panel, preferably alternating along the edges.
- Allow a bit of movement for the back panel where possible, so the material can expand and contract due to temperature or humidity changes without stress.

If you like, I can send you a simple guide for wall mounting and fixing the back panel.