Hold the hd stud finder approximately 1 inch away from the roof surface and slide it across the roof.
Roof truss stud finder.
Capable of detecting both wood and metal studs the finder will flash and beep once it has picked up the edge of a stud.
These stud finders work the same way as normal stud finders but cost more.
Transfer stud positions up and down with a 4 ft.
The reason is that stud finders are designed to scan through sheet materials such as drywall or plywood that have a fairly smooth surface and consistent thickness and density.
On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof.
High density stud finders will see through the plywood and find the rafters inside the attic.
If this distance measures 4 inches you have a 4 in 12 pitch.
8 inches and you have an 8 in 12 pitch.
Or measure from an end wall to the stud location.
How to transfer stud locations vertically.
The finder also includes the ability to detect live ac wires to avoid drilling into dangerous electrical hazards.
Place a clothes pin on the edge of a shingle directly over the truss to mark the location.
It includes two scanning modes.
Level to get to the desired height.
A typical asphalt shingle roof has a layer of wood based sheet material usually plywood or chipboard and normally with a layer of tar paper.
Listen for the stud finder to beep signaling the location of the first truss.
Even though you ve found a stud location say at an electrical box or heating grate it may not be at the height you need.
Studscan for studs up to 0 75 deep and deepscan for targets around 1 5 deep.
Trusses run in a straight line from the edge of the roof to the peak.