Yes, stud finders are very good and highly effective tools, provided you choose the right type for your walls and learn how to use them correctly.
As demonstrated on Ask This Old House, studs are typically spaced 16 inches on center in older homes and 24 inches on center in some newer construction.
Pipes, electrical wires, and ductwork can create interference during the stud-finding process. These obstacles often run through walls and can throw off readings from stud finders.
CALIBRATION ERRORS
Conventional stud finders require careful calibration. Calibrating over a stud, near another object such as an outlet or picture, or starting to calibrate before the unit is fully on the wall will all throw off your readings. Even with proper calibration, these devices struggle with: Wall texture.
Yes, your phone can function as a stud finder, but with a catch: it uses your phone's built-in magnetometer (which powers the compass) to detect the metal screws or nails hidden in your drywall, rather than the wood itself.
Magnets are a great way to find studs and are more reliable than the best stud finder tools as long as there is ferrous metal hardware in the wall.
The iPhone does not have a built-in stud-finder tool. However, you can download a metal detector app from the App Store. These apps use the iPhone’s built-in magnetometer (compass) to detect the metal screws or nails used to attach drywall to the wooden studs.
If you don't have a stud finder, use a strong rare-earth magnet or your knuckles. Magnets find the drywall screws driven into the studs, while knocking helps you listen for the difference between a hollow space and a solid, wood-backed area.
Most consumer electronic stud finders can scan through 𝟏𝟏𝟐 inches (approx. 38 mm) of wall material in their "deep scan" mode, and about 34three-fourths𝟑𝟒 inches (approx. 19 mm) in standard mode.
Even if you know how to use a stud finder and are doing it correctly, the devices may not be as effective for plaster walls. Because plaster walls are thicker, harder and more brittle than drywall, finding a stud can be a bigger challenge.
On a stud finder, AC stands for Alternating Current, which indicates the presence of live electrical wiring. The AC function acts as a non-contact voltage detector, emitting a beep or flashing a warning light to alert you to hidden "hot" electrical wires so you can safely avoid drilling or hammering into them.
Studs in most homes are spaced 16 or 24 inches apart on center, meaning the distance from the center of one stud to the next. Interior walls are usually 16" OC, while garages, basements, and exterior walls may use 24" OC for energy efficiency.
A: In the Plaster vs. Drywall comparison, plaster is generally more durable and resistant to dents, but it's also harder to repair. Drywall is easier to damage but also quicker and simpler to fix.
Finding studs in old houses is notoriously tricky due to thick walls, uneven surfaces, and dense materials like lath and plaster. For these tricky walls, your best option is a strong rare-earth magnet stud finder (like the C.H. Hanson Magnetic Stud Finder) or a multi-sensor array device (like the Franklin Sensors ProSensor M210).
Most mounting mistakes happen because the stud finder wasn't calibrated or the “stud” edges weren't confirmed. Calibrate first, then find both edges. If it reads a stud that's way too wide, it's picking up something else.
Metal studs aren’t widely used in houses primarily because wood is cheaper, faster to install, and easier for residential trades to work with. While metal doesn't burn or rot, it requires specialized tools, creates thermal bridging issues, and offers less flexibility for hanging heavy household items.
Wall studs are spaced 24 inches apart (on-center) to reduce construction costs, maximize insulation space for better energy efficiency, and improve structural efficiency. While 16 inches is the traditional standard, 24-inch spacing is commonly used in modern "advanced framing" (often with 2x6 studs) or for non-load-bearing walls.
Edge finders are the most basic type of electronic stud finders that use internal capacitive sensors. They function by detecting changes in wall density, allowing the user to locate the edges of a stud or other hidden object behind the wall surface.
Drywall Anchor Types for Lighter Items
Plastic ribbed anchors are the most commonly used anchors for lighter items and can hold up to 10 pounds per pair. Threaded drywall anchors are suitable for objects weighing up to 25 pounds and are ideal for use on drywall.
Yes, it is perfectly okay and highly recommended to drill into wall studs to securely hang heavy items like TVs, mirrors, or shelving. However, to avoid damaging hidden pipes, wiring, or the stud's structural integrity, follow these safety steps:
4 Ways to find a stud in a wall without a stud finder
You can use your smartphone to find studs, either by downloading a metal-detecting app or by purchasing a specialized radar attachment like the Walabot DIY 2. Both methods offer distinct levels of accuracy and functionality.