How to detect metal studs behind drywall?
Here’s a guide on how to find those elusive metal studs with several methods and helpful tips.
When mounting a TV, shelving, or any other heavy object, knowing how to detect metal studs behind drywall is crucial. Metal studs offer strength and durability but require specific techniques and tools for accurate detection.
1. Use a Stud Finder
Stud Finders are specialized tools designed to locate both metal and wooden studs behind drywall. Here’s how to use one effectively:
Choose the Right Tool:
There are various types of stud finders, including magnetic and electronic. Magnetic stud finders detect the screws or nails in the studs, while electronic stud finders can detect the density changes in the wall.
Calibrate the Stud Finder:
Before using, ensure that your stud finder is calibrated according to the manufacturer’s instructions. Calibration is crucial for accurate readings.
Scan the Wall:
Slowly move the stud finder horizontally across the wall. Most electronic stud finders will indicate when they detect a metal stud, while magnetic ones may require you to move slowly and feel for resistance.
Mark the Location:
Once detected, mark the location with a pencil. For metal studs, you’ll usually find screws or fasteners that are spaced evenly.
2. Knock on the Wall
Knocking is a simple and cost-effective method to detect metal studs. Here’s how to do it:
Listen for Differences:
Gently knock on the wall with your knuckles or a hammer. Pay attention to the sound. A hollow sound indicates an empty space, while a solid sound suggests the presence of a stud.
Find the Stud Edges:
Knock along the wall until you locate a solid sound. Once you’ve found the general area, measure the typical stud spacing (16 or 24 inches apart) to find the edges of the metal stud.
3. Use a Magnet
A magnet can help locate metal screws or nails in metal studs:
Select a Small Magnet:
Choose a small, strong magnet like those found on fridge doors or purchase a magnetic stud finder.
Move the Magnet Across the Wall:
Glide the magnet horizontally across the wall. It will stick to the metal screws or nails, giving you an indication of where the metal studs are located.
Mark the Spots:
Once you find a metal screw or nail, mark the spot. Then measure the spacing to locate the other screws in the stud.
4. Drill Small Test Holes
If other methods don’t yield results, drilling small test holes can be a last resort:
Drill Small Holes:
Use a small drill bit to make a tiny hole in the wall where you suspect the metal stud is located. If you hit metal, you’ve found the stud.
Check Depth:
If you don’t find metal immediately, drill slightly deeper. Be cautious not to damage any hidden wires or pipes.
Tips and Tricks
Check for Patterns:
Metal studs are typically spaced 16 or 24 inches apart. Use this spacing pattern to narrow down your search area once you detect a stud.
Use a Level:
If you’re installing something that needs to be level, use a level to ensure your measurements and markings are straight.
Verify with Multiple Methods:
For accuracy, combine methods. Use a stud finder and knocking or magnets to cross-check and confirm the location of metal studs.
Avoid Electrical Wiring:
Always be cautious of electrical wiring and pipes that might be behind the drywall. If you’re unsure, consult a professional before drilling.
Conclusion
Detecting metal studs behind drywall doesn’t have to be a daunting task. With the right tools and techniques, you can easily locate these studs and ensure a secure mount for your TV or other heavy items. Whether you use a stud finder, magnet, knocking method, or small test holes, accuracy is key. Combine methods and follow the tips above to achieve the best results for a reliable and professional installation.
Happy mounting!