How far are the wooden wall studs spaced apart in a home?
What about an older home - built in 1900 - is it 14"?
They are very difficult to find with all the plaster & lathe in the wall!
Answers:
My house was built in 1901 and the truth is there were no standards back then, you may find as we have they may be different all over the house.
Other answers:
Get a stud finder.
Or try this from This Old House:
can i set an undermounted sink on plywood than place granite over thatm?