Side note: your studs should be 16” apart on center, so you should see approximately 15” between each stud marking location if your house was built within the modern era. If you consistently get that measurement, you should be okay.
An easy way to find studs without a stud finder is take a flashlight, turn off the lights and shine the light up the wall. Hold the flashlight against the wall. The screws and mud work should be very noticeable.
Update: I used a magnet and it stuck to a spot on each area with masking tape, I'm guessing these are the screws that hold the drywall to the studs? Each piece of masking tape is about 16-18 inches apart, I'll have to double check some of them.
I use magnets to find studs, I’ve never had good luck with stud finders. Your stud finder probably uses a magnet or something similar, and where you taped is where the screws are. You can assume the studs run vertically where your tape is.
It's worth noting that there is often doubled up drywall between suites to improve fire ratings. Or there is sound mitigation products in place. Either can cause a little extra havoc with stud finders. I usually use a small drill bill and just check for S solid wood once I'm 99% sure I've found the studs.
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MaleficentPi t1_j25vjki wrote
Side note: your studs should be 16” apart on center, so you should see approximately 15” between each stud marking location if your house was built within the modern era. If you consistently get that measurement, you should be okay.