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Repairs· 4 min read

Hanging Shelves and Mirrors on Barcelona Walls Without Damage

The plug that came with your shelf was designed for a solid concrete wall. Most interior walls in Barcelona are not that, which is why shelves here so often end up on the floor.

Wall-mounted shelves fitted in a Barcelona apartment

Identify the wall first

Tap it. A hollow, drum-like sound means a thin partition or hollow brick. A dull, dense sound means solid brick or concrete. Drill dust also tells you a lot: red dust is brick, white is plasterboard or plaster, grey is concrete.

Match the fixing to the wall

Using the right fixing matters far more than using a bigger screw.

  • Solid brick or concrete: standard nylon plug, masonry bit, hammer drill
  • Hollow brick: long expansion plug or chemical anchor
  • Plasterboard: metal spring toggle or self-drilling anchor
  • Heavy mirrors and TVs: always find the structural wall, never the partition alone

When to call someone

Anything above roughly 20 kg, anything over a bed or sofa, and anything near where cables or pipes may run. A detector scan takes two minutes and avoids a very expensive afternoon.

Want this job done for you?

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