Don’t know.
The method I have used is to drive a nail or screw from below the roof sheathing to identify the edge of a rafter or truss chord and then use a tape measure from there. Alternatively, depending on what purpose finding a rafter is, pulling a couple shingles to reveal the roof deck/sheathing has been done.
At prices ranging from $600-$1300 I’d spend a little time in the attic space LONG before I’d ever buy this!!!
It says in its specs it will detect wood mass to 40cm so about 1-1/2” and some reviewers say it works well on shingles but even if locating a starting point takes a half hour - buying this tool is probably more expensive per hour than trump’s lawyers imho
Second hand they seem more reasonable $300 - $400. If they save me a ton of time then buying second hand and re-selling when I finish would be worth it.
I‘ve got 3 roof sections. Two of those roofs are closed, no attic access.
You'd be amazed by how well you can zero in on a rafter using a rubber mallet. You won't miss the first one more than an inch. You can correct and zero in from there.
Second hand they seem more reasonable $300 - $400. If they save me a ton of time then buying second hand and re-selling when I finish would be worth it.
YMMV but I’ve been building/remodeling or selling building materials since ~1985 and I’m telling you that it’s not hard to determine rafter placement in 10 minutes, 1/2 hour if you over-think like me. Any “testing” nail holes you create can be sealed with polyurethane caulking that will outlast the 25-30 year lifespan of composite shingles anyway.
$400 buys a lot of groceries.
You'd be amazed by how well you can zero in on a rafter using a rubber mallet. You won't miss the first one more than an inch. You can correct and zero in from there.
The strongest attachment in solar. IronRidge FlashFoot2® raises the bar in solar roof protection. The unique water seal is both elevated and encapsulated, delivering redundant layers of protection against water intrusion.
The strongest attachment in solar. IronRidge FlashFoot2® raises the bar in solar roof protection. The unique water seal is both elevated and encapsulated, delivering redundant layers of protection against water intrusion.