High density stud finders will see through the plywood and find the rafters inside the attic.
Roof truss stud finder.
Product description the chiptoolz rafter finder center line locator is the easiest way to find the center of a rafter ever.
Hold the hd stud finder approximately 1 inch away from the roof surface and slide it across the roof.
Trusses run in a straight line from the edge of the roof to the peak.
8 inches and you have an 8 in 12 pitch.
Studscan for studs up to 0 75 deep and deepscan for targets around 1 5 deep.
Place a clothes pin on the edge of a shingle directly over the truss to mark the location.
Transfer stud positions up and down with a 4 ft.
With the tool s patented combination of locating wire and 3 4 radius indicator key finding the center of the rafter has never been easier or faster.
How to transfer stud locations vertically.
It includes two scanning modes.
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.
If this distance measures 4 inches you have a 4 in 12 pitch.
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.
Or measure from an end wall to the stud location.
Listen for the stud finder to beep signaling the location of the first truss.
Level to get to the desired height.
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.
The finder beeps when it finds a stud.
Capable of detecting both wood and metal studs the finder will flash and beep once it has picked up the edge of a stud.