Hanging Things on Any Wall Without Regret

Almost every failed shelf comes from the same mistake: using a fixing designed for one wall type in a completely different wall.

Work out what you have

Knock on it. A solid, dull sound means masonry — brick, block or stone. A hollow sound means plasterboard, either on studs or dot-and-dabbed onto masonry.

Drill a 2 mm test hole somewhere hidden and look at the dust. Red or orange means brick. Grey and gritty means concrete or block. White and powdery means plaster or plasterboard. Wood shavings mean you found a stud, which is good news.

Dot-and-dab is the tricky one: a hollow sound, but a solid wall 20-30 mm behind the board. Common in houses built or refurbished after about 1980.

Choosing a fixing

Solid masonry. Masonry bit on hammer setting, nylon plug, screw. Match the plug and drill size exactly. For anything heavy, use frame fixings or resin anchors instead of plugs.

Plasterboard on studs — light loads. Screw straight into the stud where you can. Where you cannot, self-drive metal anchors are fine up to a few kilos.

Plasterboard on studs — heavy loads. Find the stud, always. A television, a wall-mounted desk or a full bookshelf must be fixed into structure. Spring toggles and heavy-duty metal toggles are the fallback, and they still have real limits.

Dot-and-dab. Use a long frame fixing that passes through the board and cavity into the masonry behind. A plug set in the plasterboard alone will pull out with the board attached.

Tile. Tape over the spot, mark through the tape, start on a slow speed without hammer until through the glaze, then switch to hammer for the substrate.

Before you drill

Use a cable and pipe detector, and check it in two directions. Then assume it might be wrong: never drill directly above or below a socket or switch, or in the vertical or horizontal zones running from one, because cables run in those routes.

Load rules of thumb

• One fixing does not hold a shelf. Two minimum, and a third for anything over 800 mm.
• Fix at the top of a heavy object, not the bottom. Gravity pulls the top away from the wall.
• Anything that a child could climb — a chest of drawers, a bookcase — gets an anti-tip strap into a stud. This is the one non-negotiable in the whole guide.

Get the wall type right and the rest is easy. Get it wrong and no amount of expensive screws will help.