Greg Pins

Help. I’ve just moved into a new property and due to the age (only 5 years old) they have fit their camber flooring with glue not nails/screws. They floor boards squeak and I need to know where the joists are! I have been told a stud finder will work but I don’t see how it could as it would be already detecting the wooden flooring so how would it know where the joists are? Can anyone help me to find the joists. Thank you so much