ᐅ How do I mount BILLY shelves on smooth walls?

dikarlo60 schrieb:
The wall is a classic plastered brick wall, rather smooth than rough

The note about a plastered classic brick wall is crucial. In this case, when drilling and installing anchors, the thickness and load-bearing capacity of the plaster are very important. If the plaster is too thick and brittle, the anchor may only hold in the plaster and not in the masonry. This results in weak support.

I therefore recommend carefully checking the edge of the drilled hole with a pointed object (e.g., a screwdriver) after drilling: if you can already feel the masonry, that’s good. However, if the drill mostly passes through plaster, this problem is likely to occur.

A so-called “expansion bolt” that grips in the masonry often helps here, or using injection mortar, as poted already mentioned.

Additionally, it should be noted that for Billy-type shelving units, wall mounting must ensure not only load-bearing capacity but also stability against tipping. Make sure the shelves are properly secured with at least two brackets.

In addition to the previous suggestions, I recommend marking the mounting holes of the BILLY shelves with a spirit level and precisely determining the position of the wall anchors. On solid walls without cavities, the tensile strength is usually higher than with cavities, but it can be significantly reduced by plaster layers.

Place the wall anchors at least 8-10 cm (3-4 inches) apart to ensure even load distribution, and use high-quality anchors with good manufacturer feedback, such as Fischer or Spax.

For installation:
1. Pre-drill the wall with the appropriate drill bit
2. Insert the anchors, which should fit firmly
3. Attach the shelf with screws

For later removal, it is advisable to remove the screws evenly using a screwdriver (better than a cordless drill) to avoid stripping.

pinbo schrieb:
A plaster that is too thick and brittle can cause the anchor to hold only in the plaster and not in the masonry.

This is often the critical point. Anchors are generally designed for solid materials. If the plaster is old, crumbly, or very thin, it sometimes helps to carefully test the area behind the plaster with a small drill hole or a gentle tap with a hammer.

If you’re unsure how to reach the load-bearing masonry, I would recommend using a metal anchor (e.g., a hollow wall metal anchor) or, if the wall is very smooth with solid plaster, heavy-duty anchors (metal anchors). Although these are more complex to install, they offer significantly greater security.

Important: If you are hanging several shelves side by side, it’s worth accurately calculating the total load. A typical BILLY shelf can easily reach 125 kg (275 lbs) when loaded with 25 kg (55 lbs) per shelf and 5 shelves in total, which needs to be well distributed and securely supported.

Is there a particular wall height or shelf mounting height that concerns you? This is important for stability and tipping safety.

poted schrieb:
Is there a specific wall height or shelf mounting height that you are particularly interested in?

The shelf will be installed at about 2 meters (6.5 feet) high, so it will be screwed into the upper wall area. Since it won't remain a free-standing shelf but will be fixed to the wall, this top element needs to be especially secure.

My main concern is durability and safety for normal household use, primarily books and files, occasionally heavier items up to 30 kilograms (66 pounds) per shelf.

Renla47 schrieb:
Given your load and the wall, I would recommend using 8 mm (0.3 inch) wall plugs to be safe.

That confirms my assumption, so I will use 8 mm (0.3 inch) wall plugs and matching screws. Thanks for the helpful advice!

Additionally, I would like to systematically suggest the following procedure to ensure secure mounting of BILLY shelves on smooth, plastered walls:

1. Check wall type and load-bearing capacity – As mentioned, knowing the plaster thickness and wall material is fundamental.

2. Mark the drill hole positions precisely, including alignment with a spirit level.

3. Drill the holes with the appropriate drill bit – for plastered brick walls, at least 8mm (0.3 inches) diameter for suitable anchors.

4. Insert anchors – use nylon anchors for standard walls; for hollow spaces or crumbly plaster, use metal or expansion anchors.

5. Select screws – at least 50mm (2 inches) long, matching the anchor diameter.

6. Attach the wall brackets through the upper holes of the shelf to ensure tipping safety.

7. Consider load distribution – use at least two fixing points per shelf unit.

8. For smooth walls, if necessary, lightly roughen or texture the wall surface at the fixing points to improve grip.

Screws can be easily removed for disassembly. Any anchor hole residue can be easily filled with filler and painted over.

This is a proven method that has been effective in both DIY and professional settings.

Use 8 mm (0.3 inches) wall plugs and 5x50 mm (0.2x2 inches) screws.
Concrete or brick wall? Choose the drill bit accordingly, preferably a hammer drill.
Securely fasten at least two brackets per shelf.
Use a spirit level for precise alignment.