Measuring and Layout — FAQ
Why do contractors prefer electronic over magnetic stud finders?
Electronic scanners detect wood density changes and metal fasteners, while magnets only find nails. Electronics locate stud edges and centers precisely, map multiple studs instantly, and detect live wires—critical safety features magnets can't provide. The speed and accuracy justify the higher cost for professional use.
Do I need different modes for wood vs. metal studs?
Yes. Metal studs require metal detection mode, which scans for density changes in steel rather than wood grain. Most multi-scanners auto-detect or switch modes manually. Using wood mode on metal studs gives false readings. Premium models like Bosch and Franklin handle both simultaneously.
How accurate are stud finders on plaster walls?
Plaster over lath challenges basic finders due to inconsistent density and metal lath. Pro models with deep-scan modes and auto-correcting technology (like Zircon ACT) perform reliably. Franklin's multi-sensor array also excels by sampling multiple points simultaneously, averaging out irregularities.
Can stud finders detect PVC pipes?
Most electronic finders detect density changes but struggle with PVC since it's similar to air-filled drywall. Advanced models with metal detection will find nearby brackets or straps. For PVC, use a dedicated pipe detector or thermal imaging. Always verify with a pilot hole before drilling deep.
What's the difference between edge and center finding?
Edge finders locate stud edges, requiring you to mark both sides and find center manually. Center finders pinpoint the exact middle. For contractors, center finders save time and reduce error. Franklin's array shows the full stud width, while Zircon's SpotLite physically points to center.
How do I calibrate my stud finder?
Most modern electronic finders auto-calibrate when placed on the wall. Hold the power button, wait for the beep or light, then scan slowly. If readings seem off, recalibrate on a known empty wall section. Franklin sensors require no calibration, making them ideal for fast-paced work.
