ᐅ KALLAX is positioned too close to the window – does that really make a difference?

Hello everyone,

I’m currently considering whether it really makes a difference to place an IKEA KALLAX shelving unit very close to a window – say, with the back of the unit almost touching the window frame. My concerns are, on one hand, whether the proximity to the window might cause the shelf to absorb moisture more quickly and thus get damaged, or if sunlight could lead to fading of the colors. On the other hand, I wonder if temperature differences and possible drafts actually affect the stability or lifespan of the furniture.

Does anyone happen to have experience with a KALLAX or similar shelving units placed near windows? In practice, does being close to the window make a significant difference, especially when the shelf is filled with books or electronics? I look forward to your insights!

Taupau schrieb:
whether the shelf near the window is more likely to absorb moisture quickly and get damaged, or if the sunlight can cause the colors to fade.

Hey, that’s a good question! Of course, you can’t get 100% protection, but I also have my KALLAX right next to the window. Yes, the surface will fade slightly over time due to sunlight – but that really takes years. As for moisture: as long as the window isn’t constantly condensing or the room isn’t extremely humid, nothing should happen. You might notice a little draft, but so far the shelf has held up without any issues.

I’d say if you regularly ventilate the room and there are no water sources right next to it, the KALLAX can be placed quite close to the window. 🙂 The important thing is to avoid puddles or moisture directly on the wood.

Proximity to windows can promote moisture and fading. So with KALLAX: it’s better to keep some distance if you want it to last a long time.

dijan schrieb:
The shelf has so far held up without any issues.

That sounds reassuring, but I completely understand Taupau’s concern about moisture. Especially in older apartments, the windowsill or surrounding area can sometimes be cooler, which can quickly lead to condensation forming.

I once had a small shelf placed nearby, and after a while, I really noticed the wood starting to suffer. However, I experienced this in a poorly insulated older building, so I guess it depends on the circumstances.

Taupau, have you perhaps already checked how well insulated your window is? That could be quite relevant.

I think people are taking this way too seriously. Sure, leaving a few centimeters (inches) of space is a nice idea, but honestly: the KALLAX isn’t exactly the most delicate piece of furniture Ikea has ever made.

A quick practical thought: if you place your shelf right next to the window, you usually have either blinds or curtains anyway – so that already reduces direct sunlight exposure.

Also, KALLAX is made of MDF or particleboard – it doesn’t soak up water like a sponge. So no need to panic about moisture!

The constant fear of the “window monster” is a bit over the top here. 😉

By the way, has anyone tried this with fabric storage boxes or something similar next to the window? That would be interesting too.

Here is a brief overview that I consider relevant:

1. Material properties: KALLAX is made of coated particleboard; it tolerates moderate moisture better than untreated wood, but direct exposure to water should be avoided.
2. UV radiation: Prolonged sunlight can cause surface colors to fade, which is a physical effect affecting all furniture surfaces.
3. Temperature and humidity fluctuations: If your window is poorly insulated and drafts are strong, especially in winter, condensation may occur, which can be problematic.

Ideally, allow at least 5–10 cm (2–4 inches) of space for air circulation and to let any moisture dissipate. If that is not possible, I recommend regularly wiping down the shelf and checking for signs of damage.

Conclusion: The proximity to the window can make a difference depending on the environmental conditions. Always consider the indoor climate alongside the location of windows and furniture.