ᐅ How can I securely mount Billy shelves on drywall and plasterboard walls?

Thanks for the tips so far! I’m still wondering how I can find out whether there is a metal or wooden stud wall behind my drywall. Is it enough to use a simple stud finder, or are there other information or practical tips? Also: What should I do if I don’t find any studs at all – is it then safe enough to use, for example, two or more anchor bolts per board, or is mounting with battens always recommended?

To locate studs behind drywall, you can actually use an electronic stud finder that detects both metal and wood. Make sure the device is set to detect both materials. Alternatively, you can gently press a small nail into the wall to feel for a stud, but this method is less precise.

If you cannot find a stud, using multiple metal Molly bolts per shelf board is highly recommended. Installing a mounting strip is an additional safety measure, especially if the shelf will be heavily loaded. However, the bolts alone can be sufficient if they are installed correctly and the wall is not overloaded.

mirsatjo schrieb:

I’m still wondering how I can find out whether there is a metal or wooden stud wall behind my drywall?

A stud finder is the best solution. Alternatively, you can tap on the wall and listen for hollow or solid sounds – this doesn’t give an exact result, but you can notice the difference.

mirsatjo schrieb:

Is it then safe to use, for example, two or more molly bolts per board?

Yes, two to three molly bolts per board are good. More may be needed depending on the weight.

In addition to the methods mentioned, I strongly recommend paying close attention to the maximum load capacity of the anchors used. Manufacturers usually specify an allowable load per anchor, but this only applies if they are installed correctly and matched to the appropriate substrate.

For gypsum plasterboards with a thickness of 12.5mm (0.5 inches) without a supporting substructure, it is advisable to implement additional measures such as reinforcing the wall or directly screwing into the substructure for heavy use and higher loads. Simply using multiple molly anchors increases holding power but does not replace structural safety.

Depending on the load, a wooden batten should be screwed in crosswise, or the shelves should be anchored in studs if possible. Check the availability of this in your wall construction.

gekira schrieb:

For drywall panels with a thickness of 12.5 mm (1/2 inch) without a supporting substructure, it is advisable to use additional measures such as reinforcing the wall or directly screwing into the substructure when the wall will be used heavily or subjected to higher loads.

That’s exactly what I did! I mounted my shelves on wooden battens and now I feel very secure. 🙂 It’s always better to be safe than sorry when it comes to fastening! So: better to reinforce from the start!

As a supplement to the practical tips, here are some additional facts: Billy shelves are generally designed to hold relatively light loads. The recommended load limits, however, are based on mounting to a solid wall. For drywall (plasterboard), special anchors are essential, with metal molly bolts offering higher load capacity than plastic toggle anchors.

Also, pay close attention to the exact drill hole size. A hole that is too large will significantly reduce the holding strength.

It is also advisable to distribute the load evenly on the shelves and avoid point loads caused by very heavy items placed at the top edge.

Whether mounting on a wooden batten is necessary depends on the individual load – with heavy use and full loading, an additional wooden batten is a sensible measure.