ᐅ Perfect installation of BILLY shelves on drywall walls.

Created on: 31 May 2022 09:18
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Parga
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Parga
31 May 2022 09:18
Hello everyone,

I am planning to mount a BILLY shelf on a drywall and I am unsure about the best and, above all, safest way to do it. The wall is a typical drywall construction, approximately 12.5 mm (0.5 inches) thick, with metal studs, which naturally limits the load capacity.

My detailed questions are:
1. Which fasteners are best suited to secure the shelf safely and stably? Are special anchors or screws recommended?
2. How can I best distribute the load to minimize the risk of damage or breakouts in the drywall?
3. Are there any special methods or tips for adjusting or aligning the BILLY shelf when mounting it on such a wall?

I already have some tools but face the challenge of not wanting to damage the wall while also needing the shelf to hold heavy books. I would greatly appreciate advice, experiences, or warnings about common mistakes. Thanks in advance!
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LOJOPAR
31 May 2022 12:06
Hello Parga,

Your questions about securely mounting a BILLY shelf unit on drywall are very well asked. I am happy to address them step by step:

1. Fasteners: For drywall, specialized hollow wall anchors are particularly suitable, such as metal toggle bolts or spring-loaded hollow wall anchors. These ensure that the load is distributed behind the board. For a heavy shelf, I would advise against using simple plastic expansion anchors.

2. Load distribution: It is important to use at least two fastening points per shelf board. That means the screws should be placed as far apart as possible so the load is spread across multiple points. Additionally, you should carefully adjust the shelves so the weight is supported evenly.

3. Adjustment: Use a spirit level during installation to ensure alignment. If the shelf unit stands on an uneven wall, small washers can be placed under the feet to prevent rocking later on.

One more tip: Plan the position of the steel studs before installation, as they provide the best support. You can locate them using a stud finder or metal detector.

If you need more details about the anchors, I can gladly recommend some.
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BLAKEO
31 May 2022 14:25
Interesting thread!

However, I wonder if the classic recommendation to use cavity anchors is really the safest solution here.
LOJOPAR schrieb:
For drywall, specialized cavity anchors are particularly suitable, such as metal toggle bolts or spring-loaded cavity anchors.

While this is common practice, I would question whether that alone is sufficient for a fully loaded BILLY shelf. What are the exact dimensions of the shelf, and how heavily do you actually intend to load it?

In my experience, if the shelf is meant to carry a lot of weight, only direct attachment points to the metal studs provide absolute security.

Additionally, for large shelves or heavy loads, wall brackets could help absorb tension forces better and relieve stress on the structure.

Are you sure that the drywall and its studs can handle the load profile of your shelf?
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Parga
1 Jun 2022 08:52
Thanks in advance for the answers so far!
LOJOPAR schrieb:
Also plan the position of the metal studs before installation, as they provide the best support. You can locate them using a wire detector or metal scanner.

This is a very important tip that I hadn’t really considered before – thank you!

About the shelf: it is the standard BILLY measuring 80x28x202 cm (width x depth x height). I plan to fill the shelf mainly with books and binders, so it will carry a considerable weight. Therefore, I definitely want to take the use of the metal studs into account.

Could you provide some specific advice regarding types of wall plugs (anchors) and screw standards? What size should be chosen to ensure sufficient holding strength on both metal studs and drywall (plasterboard)?

One last question: I have read that fixing points on board joints should be avoided. Does this apply to our project, especially with a shelf placed against the wall?

I look forward to detailed tips on how to securely and neatly mount the shelf.
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BENBI
2 Jun 2022 10:11
Hello Parga,

Based on your detailed description, I would like to offer you comprehensive advice to ensure you achieve a perfect installation.

First, some general information about drywall partitions: In your case, these consist of 12.5 mm thick drywall sheets with metal studs behind them, which is typical for drywall construction. The most important rule for a secure shelf mounting is to transfer the load as directly as possible onto these metal studs—anything else is always a compromise.

Regarding fastening methods:
- Targeting metal studs: Use a reliable metal or cable detector to accurately locate the studs. The studs are usually 60 mm wide (standard CW profile), and typically 50 mm deep.
- Screws: Choose self-tapping sheet metal screws with a diameter of 4.5 to 5 mm and at least 40 mm length to ensure good penetration into the stud.
- Anchors: Hollow wall anchors provide little benefit when fastening directly to the studs; they are more useful when there is no direct contact with the studs.

Installation tips:
- Drill position: Always place the drill bit exactly in the center of the stud. If in doubt, measure twice.
- Pre-drilling: Drill a pilot hole of 3 to 4 mm for the screw to prevent bending the stud.
- Drill speed: Use a low drill speed to avoid damaging the drywall sheet.

Regarding the joint between drywall sheets:
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Parga schrieb:
I have read that it is best to avoid fastening at drywall joints.

Exactly right—stability is lower at joints, and screws will hold less effectively. Therefore, it is better to screw on a continuous drywall section and, if possible, directly into the stud.

Finally, one more tip:
If you plan to mount the shelf at multiple points on the wall, combining screws into the metal studs with additional wall anchors on unsupported areas can help distribute the load more evenly.

If you have further questions, please provide more details about your wall construction, for example the spacing of the studs, so I can assist you more specifically.