[RE-wrenches] EJOT solar fasteners

RE-Wrenches: Does anyone have any experience with EJOT solar fasteners: http://www.ejot.com/ejot.de/EJOT_Solar_Fastening--4653.htm ? Are there similar products that can be used for prefab metal warehouse roofs? Bob Clark SolarWind Energy Systems, LLC P.O. Box 1234 Okanogan, WA 98840

Re: [RE-wrenches] EJOT solar fasteners

We looked at these when they first came out but have concerns about "settling" or "crushing" the raised metal roofing.  I am sure this is less a problem if there is pre-formed insulation below, but we have seen other attempts to put roof attachment on the high "humps" of the roofing and if you tigh