How to Find Studs in Plasterboard

First decide whether there is a stud to find

A hollow-sounding internal partition may have timber or metal framing, but plasterboard can also be bonded directly to masonry with adhesive dabs. In that dot-and-dab construction there may be no repeating timber stud pattern. Treat the wall type as a question to answer, not an assumption.

Manufacturer systems often use regular centres — British Gypsum documentation includes 600 mm and, for some applications, 400 mm examples — but openings, reinforcement and later alterations change the layout. Spacing is a cross-check after detection, never the method used to choose a fixing point.

Step by step: mark the stud centre

1. Set the bracket height first. Mark the horizontal zone needed for the television, mirror or shelf so you scan where the fixings will actually land.
2. Read the detector instructions. Select its wood or dry-wall mode and complete any model-specific calibration on a clear, flat area.
3. Move slowly across the wall. Keep the sensor face flat and mark the first repeatable edge response.
4. Approach from the other side. Scan back towards the same area and mark the second edge.
5. Mark the midpoint. The midpoint between repeatable edges is the candidate centre, not yet a confirmed drill point.
6. Repeat higher or lower. A stud should form a consistent vertical line. A single isolated response may be a fixing or another object.
7. Run the hazard checks. Use the applicable metal and live-wire modes, and inspect nearby sockets, switches and plumbing before any drilling.

This method is designed to avoid the frustrating row of exploratory holes that damages a newly decorated wall. It also gives you two centre marks when a wide television bracket or long shelf needs more than one support.

Wood, metal or masonry changes the fixing

A centre response does not certify load capacity. A timber stud, light-gauge metal frame and masonry background need different fixings, and the bracket manufacturer’s load instructions still apply. If the scanner indicates metal continuously, do not assume it is a metal stud: it may be a pipe, cable protection or another service.

Keep the topics separate

For the detailed electrical check, use the guide on how to find hidden wires in walls. For first-time controls, modes and marking technique, see how to use a wall scanner. This page owns the narrower task of locating and marking framing for a heavy fixing.