Hello everyone,
I have a somewhat specific question: Why do some Billy shelves warp after extended use?
I am referring to the common issue where the shelves no longer stand straight after months or years, sometimes sag slightly, or the side panels bend. I am particularly interested in the causes at the material level and possible influences from the environment, load, or assembly. Are there specific weak points in the construction or common mistakes that lead to this warping?
Perhaps someone with experience knows the exact connections or can provide technical details about the wood panels, screws, or connecting hardware used. It would be great if the answers could be as detailed and well-founded as possible, so I can better understand the problem and, if possible, prevent it.
I have a somewhat specific question: Why do some Billy shelves warp after extended use?
I am referring to the common issue where the shelves no longer stand straight after months or years, sometimes sag slightly, or the side panels bend. I am particularly interested in the causes at the material level and possible influences from the environment, load, or assembly. Are there specific weak points in the construction or common mistakes that lead to this warping?
Perhaps someone with experience knows the exact connections or can provide technical details about the wood panels, screws, or connecting hardware used. It would be great if the answers could be as detailed and well-founded as possible, so I can better understand the problem and, if possible, prevent it.
dijan schrieb:
One reason is certainly the material: BILLY consists of particleboard coated with a foil. These panels can swell over timeDijan, that is probably correct, but such explanations often lack sufficient evidence.
I am interested: Are there reliable studies or manufacturer data that demonstrate the hygroscopic behavior of coated particleboard in terms of warping? I ask because modern melamine resin coatings are actually water-repellent and at least protect the panels against surface moisture.
The impact of load and installation errors should likely be given more weight, as these could be direct mechanical causes for deformation.
Who can provide specific technical information or tests on this?
Josefane schrieb:
Modern melamine resin coatings are water-repellentThis is generally true; however, the protective coating on the edges is not always continuous. So-called “open edges” limit the moisture resistance.
The manufacturer points out in their product information that chipboard and MDF remain hygroscopic despite the coating. Micro-damage to the foil as well as moisture from the surrounding environment, for example due to slightly elevated humidity, can cause swelling.
DIN standards and test methods for furniture panels confirm moisture absorption, which should not be underestimated, especially in edge processing.
Avoiding this issue is only possible through professional control of moisture at the installation site and careful edge bonding.
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