ᐅ After replacing the windows, the surface of my KALLAX unit is swelling – what can I do?

Created on: 9 Apr 2020 19:23
T
tauvin
T
tauvin
9 Apr 2020 19:23
Hello everyone,

I recently had new windows installed because the old ones were very old and no longer properly sealed. Since the window replacement, I have encountered an annoying problem: the wooden surface of my KALLAX shelf is noticeably swelling in the areas directly facing the new window. It looks as though the surface has absorbed moisture and feels swollen and wavy.

The shelf is placed directly against the wall below the window. I assume that the new windows and their seals may have caused condensation or changed the humidity levels, which the wood is absorbing.

Has anyone experienced something similar? What other causes could be possible, and most importantly: what can I do to stop the swelling or help the material return to normal?

I would appreciate any tips or suggestions!
R
roryvin
9 Apr 2020 19:56
Hello,

Based on your description, the cause is most likely moisture absorption by the shelf wood, triggered by new environmental conditions after the window replacement.

New windows can change airflow and cause condensation, especially if air circulation is limited and moisture cannot escape. KALLAX shelves are usually made of particleboard or MDF with veneer, which swell when exposed to moisture.

I recommend the following steps:

1. Check if the window is properly sealed and no moisture is directly entering (e.g., through leaks that let water drip onto the shelf).

2. Improve air circulation around the shelf area, for example by opening windows occasionally or ventilating the room.

3. Use dehumidifiers or place products like silica gel or salt crystals to reduce indoor moisture levels.

4. As a preventive measure, apply a protective sealant to the furniture surface.

In the long term, moisture-resistant materials might be better suited for this window environment.
R
ronti
9 Apr 2020 20:04
Move the shelf away from the window to reduce moisture. Otherwise, use a dehumidifier.
F
Far34
9 Apr 2020 20:17
Tilt windows or ventilate more often. Wood swells due to high humidity.
K
Kukar
9 Apr 2020 20:33
Wash the shelf, let it dry, and then sand it lightly. After that, apply wood oil or varnish.
B
BLAMAU
9 Apr 2020 21:12
Also, make sure that the KALLAX material does not get wet under any circumstances. Avoid damp areas.