ᐅ Kallax dried after flood – Is the wood splintering?

Hello everyone,

I have a wooden Kallax shelf that was unfortunately completely submerged during a recent flood. I have dried the shelf as thoroughly as possible, but I noticed that at the edges and in areas where the wood is under more stress, the wood is starting to splinter in some spots. My question is: Can this happen after the wood has been wet and then dried? Or does this splitting indicate permanent damage or even a loss of value for the shelf?

I’m asking because I’m not sure if this is normal after moisture exposure and how stable the shelf might still be. Perhaps some of you have had similar experiences or advice on what to do next, such as how to treat the wood to prevent further splintering or becoming brittle.

Thanks in advance for your feedback!

Splitting after drying is typical when the wood has been wet for a long time. This occurs due to shrinkage, as the fibers can tear. It is important to allow the shelf to dry slowly and evenly.

Leote schrieb:
Splitting after drying is typical when the wood has been wet for a long time.

Exactly, I would like to add that with furniture made from multiplex glued wood panels like the Kallax, the different layers can react differently to moisture. When the wood absorbs moisture and then dries again, it shrinks and internal stresses develop in the material. These stresses cause small cracks or splitting, especially at the edges, which are particularly exposed.

Another point: Kallax is usually made from particleboard with a wood veneer or laminate layer. This veneer can peel off or start to split if it got wet because it is often less resistant to moisture than solid wood.

Practically, this means that while the stability of the shelf might remain somewhat intact, the cosmetic issue of splitting will persist. If you want to keep using the shelf, you should make sure it stays as dry as possible and perhaps consider a surface treatment with wood oil or varnish to seal or stabilize the areas that are splitting.

Question: How was your shelf dried? Was it in heated indoor spaces or in a cooler environment?

Filippo schrieb:
Question: How was your shelf dried? Was it kept in heated indoor rooms or a cooler environment?

Thank you for your detailed explanation! The shelf was kept dry inside my apartment, in heated rooms, but I just helped the air circulation by opening doors and windows and running the heating at a medium level. I didn’t want it to dry too quickly to avoid cracks.

However, I noticed that the splinters were already visible while the wood was still damp. Now, after it has completely dried, the effect has become even more pronounced. I’m wondering if I should use something like wood filler or a special varnish to stabilize these areas, or if that wouldn’t make much difference.

I imagine that the wood fibers in some spots are simply too damaged to be improved.

A good approach is to first gently smooth the splintered areas using very fine sandpaper (e.g., grit 240 to 320). This helps prevent the wood from further peeling or splintering at these spots.

Afterwards, you can apply special interior wood filler that remains flexible to avoid new cracks caused by temperature and humidity changes. Once the filler has dried, the surface should be sanded again very finely.

Finally, I recommend a moisture-resistant surface treatment, such as water-based clear varnish or wood oil, depending on the desired appearance of the shelf. This protects against further moisture and prevents new splinters from forming.

A tip: Avoid aggressive chemical cleaners or rapid drying with heat (e.g., a hairdryer), as this could further damage the wood fibers.

However, if the shelf is seriously damaged, a complete restoration will be difficult—you can only minimize the damage.

Chennar schrieb:
I wonder if I should use something like wood filler or a special varnish to stabilize the areas, or if that wouldn’t make much difference.

Absolutely, that’s exactly the way to go! 🙂 Wood filler and a protective varnish are the best allies when wood is under water stress. You can’t reverse the splitting, but you can definitely stop it.

Just make sure to firmly fix all loose fibers when applying the filler. Then apply a matte clear varnish on top – this will provide great stability and also looks quite neat!

And honestly: every skilled craftsman has tamed rough, splintered wood at some point. You’ve got this!