Summary:
To check pipes cables before drilling, scan the wall first with a wall scanner (stud finder), then choose a fixing point that is clear of hidden services and structural supports. This is the beginner-safe order: scan, mark, then drill.
How to check for pipes, cables and studs before drilling
- Look for nearby sockets, switches, radiators and plumbing fixtures that suggest hidden routes.
- Avoid drilling directly above, below, or in line with them where possible.
- Use a wall scanner (stud finder) to scan a wider area around your mark for cables, pipes and studs.
- Mark any “no-go” zones and pick a clear fixing point.
- Only drill once the scan shows the area is clear and your fixing point makes sense.
Introduction
You’ve measured up for a shelf, a mirror, or a hook, and now you’re staring at the wall thinking: what’s actually behind this? That pause is sensible. Walls can hide electrical cables, water pipes and studs, and you do not want to discover them by accident.
The good news is you do not need to guess. A calm check using a wall scanner (stud finder), plus a bit of common-sense positioning, is the safest beginner method. The rule for this job is simple: scan first, drill second.
Step 1: Read the wall for obvious risk areas
Before you scan, take ten seconds to look around your drill point. Most services follow logical routes from the things you can already see.
Areas to treat as higher risk
- Near electrical sockets and light switches
- Near radiators, boilers, and visible pipework
- Near sinks, toilets, baths and kitchen units
- Near wall lights, extractor fans and fitted appliances
Why this works: Cables and pipes are usually run in straight, sensible lines to reach these points. If your mark sits in a “line of travel”, move it if you can.
Step 2: Use a wall scanner (stud finder) before any drilling
This is the main safety step. A wall scanner is designed to help you locate studs and detect hidden cables and pipes. Scan the wall first, then decide where it is safe to drill.
How to scan properly (beginner-friendly)
- Start scanning away from your intended drill spot, then move slowly towards it.
- Scan a rectangle around the area, not just the exact dot (for example, 20–30 cm wider than your fixing point).
- Scan in two directions (left-to-right, then top-to-bottom) so you spot routes and edges more clearly.
- Mark what you find with a pencil: safe area, stud line, and any detected cable or pipe zones.
Why this works: Scanning a wider area helps you understand what’s behind the wall, not just whether the centre point is risky. That makes it much easier to choose a safe fixing point with confidence.
Step 3: Decide whether you want a stud or want to avoid it
Studs can be helpful or annoying, depending on what you are fixing. A stud is usually the strongest place to fix into a stud wall, but you do not always need to hit one for light items.
When a stud is useful
- Heavier items where you want the strongest possible fixing point
- Wall-mounted brackets that will carry load
When you may choose a clear area instead
- Small hooks, light frames, or cable clips (depending on the wall type and fixings used)
- When a stud position does not line up with where the item needs to go
Why this works: The scanner tells you where the structure is, so you can make an informed choice rather than drilling blind.
Step 4: Re-check your chosen fixing point
Once you pick the spot, scan it again. Beginners often scan once, then shift the mark slightly while measuring, which can undo the whole safety check.
- Scan directly over the final pencil mark
- Scan just above, below and to each side of it
- Only proceed if it stays clear and you are not aligned with obvious service routes
Common mistakes to avoid
- Drilling first and assuming it is “only a small hole”
- Scanning only the exact dot instead of a wider area
- Ignoring the line above or below a socket or switch
- Moving the drill point after scanning without scanning again
- Rushing because you feel nervous and want it done quickly
FAQ
Do I still need a wall scanner if the wall looks solid?
Yes. Solid walls can still contain cables and pipes, and stud walls can hide services in the void. A scanner reduces guesswork and helps you pick a safer position.
What if the scanner shows something where I want to drill?
Do not drill there. Move the fixing point to a clear area, or choose a different mounting approach. If the location is critical and you are unsure, get a qualified person to check before you drill.
Handy bits that make this easier (optional)
- Wall scanner / stud finder (multi-sensor if possible)
- Franklin Sensors ProSensor M210 Stud Finder with 13-Sensors, Wood & Metal Stud Detector/Wall Scanner
- Pencil for marking safe and unsafe zones
- Masking tape (helps keep marks clear and reduces surface chipping)
- Torch/light source (better visibility when checking the wall surface)
- Sylstar COB Rechargeable Work Light, 100W Rechargeable Portable LED Flood Light 7000 Lumens
- Spirit level (for accurate fixing points)
- OX Spirit Level
