Hello everyone, I have a problem with my KALLAX shelf from IKEA: the glued joints between the shelves and the side panels are no longer holding well. I have tried reglueing these areas several times, but the result is not lasting, and the joints quickly become loose again. My question is: how can I reinforce the glued joints in the KALLAX shelf to increase stability? What methods or additional measures do you recommend without completely disassembling the furniture? Are there any proven techniques or practical tips beyond just gluing? I look forward to your experiences and advice!
Regarding the topic: KALLAX shelves are made of coated chipboard, which makes glued joints generally more challenging because the glue adheres effectively only to the edges.
Important to know:
- The surface should be thoroughly degreased and sanded beforehand.
- Using polyurethane (PU) wood glue is recommended, as it bonds better than Ponal.
- Proper clamping pressure during assembly is essential.
For reinforcement, internal edge protection strips made of wood or narrow angle brackets can be installed. This significantly increases stability without affecting the outer appearance.
Additionally, a combination of dowels and glue is optimal, provided the drilling is precise.
Important to know:
- The surface should be thoroughly degreased and sanded beforehand.
- Using polyurethane (PU) wood glue is recommended, as it bonds better than Ponal.
- Proper clamping pressure during assembly is essential.
For reinforcement, internal edge protection strips made of wood or narrow angle brackets can be installed. This significantly increases stability without affecting the outer appearance.
Additionally, a combination of dowels and glue is optimal, provided the drilling is precise.
Thank you very much for the numerous responses!
I see that the issue is related to the materials. So far, I have only used ordinary wood glue and have not drilled any holes or inserted dowels.
A question for those with practical experience: How difficult is it to drill the dowel holes in the KALLAX? I’m concerned that the particleboard might chip during drilling. And what size dowels should be used?
I am also considering whether small metal brackets on the inside are really a good solution. Do they significantly affect the appearance when the shelves are fully loaded? Some of the weight will be supported by books, so I would prefer a solution that is as unobtrusive as possible.
I see that the issue is related to the materials. So far, I have only used ordinary wood glue and have not drilled any holes or inserted dowels.
A question for those with practical experience: How difficult is it to drill the dowel holes in the KALLAX? I’m concerned that the particleboard might chip during drilling. And what size dowels should be used?
I am also considering whether small metal brackets on the inside are really a good solution. Do they significantly affect the appearance when the shelves are fully loaded? Some of the weight will be supported by books, so I would prefer a solution that is as unobtrusive as possible.
Flobau56 schrieb:
Fear that the chipboard will splinter when drilling That concern is justified. For this reason, I always place a thin piece of cardboard under the drilling spot to prevent splintering. Also, drill slowly and start with a small pilot drill bit.
Flobau56 schrieb:
What size should the wall plugs be? 8mm (5/16 inch) wall plugs are usually a good compromise for KALLAX.
Metal brackets are hardly noticeable even under full load, especially if mounted on the inside.
Here is an additional tip for preparation:
If you plan to use wall plugs, use a center punch (also called a spotting punch) to mark the drilling spot accurately. This helps prevent the drill bit from slipping.
When drilling, always start from the back side of the panel, that is, from the less visible side, to avoid splintering.
After gluing, clamp the joint firmly with clamps (ideally several, depending on the size) and let it rest for at least 24 hours.
If you plan to use wall plugs, use a center punch (also called a spotting punch) to mark the drilling spot accurately. This helps prevent the drill bit from slipping.
When drilling, always start from the back side of the panel, that is, from the less visible side, to avoid splintering.
After gluing, clamp the joint firmly with clamps (ideally several, depending on the size) and let it rest for at least 24 hours.
bulanau schrieb:
After gluing, press the joint firmly with clamps (ideally several, depending on the size) and let it rest for at least 24 hours. I personally always underestimate this. It's better to be patient and wait an extra day 😉.
Also, if you don’t have clamps, it helps to weigh down the shelf with heavy objects or books for a while to keep the joint stable during drying.
I’m glad this discussion is bringing so many good suggestions!
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