Have you looked at EcoFasten mounting. They have a mount that uses 8 screws per attachment, so can theoretically hold without going into the rafters. Then could use a large flashing over that to integrate with the shingles.
I think they're an offshoot of AlpenSnowguards in Vermont. We started working with Alpen to source S5 clamps several years ago, and have found them great to work with. We're a West coast company - there were lots of other distributors closer, but Alpen got and kept our business. It's kind of funny - when I call them, I feel like I'm talking with someone in one of those old hardware stores with everything you need right there in bins, and when I call the other guys it seems like someone in a sales office who never handles the product. The EcoFasten crew is similarly helpful, and they have some well thought out products. The name I have in my rollodex is Chris Sterns, at 877-859-3947. http://www.ecofastensolar.com/our-products/eco-fasten <http://www.ecofastensolar.com/our-products/eco-fasten>Their website is pretty comprehensive, and includes leak and load tests and building code info. Other cool mounting products too. -- Antony Tersol Solex / Applied Solar Energy 831-333-1919 You wrote: For residential install with the spray foam insulation Underside of deck has 12"+ of foam.....no way to accurately locate rafter there.....hammer and ear also out of the question...........don't think any of the stud finders will work....been told that peeling back shingles to locate rafter is only accurate way.......would like to avoid that if possible..........any suggestions? Holt E. Kelly Holtek Fireplace & Solar Products 500 Jewell Dr. Waco TX. 76712 254-751-9111 www.holteksolar.com
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