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I am interested in having a permanent anchor installed as part of a re-roof where we are switching to .032" aluminum standing seam from asphalt shingles. Is there a way this has been done successfully before that I can share with my contractor?
My preference would be an aluminum anchor due to corrosion concerns with my house ~100' from salt water, but stainless seems like it may be OK too.
For the warranty, the roof has to be cleaned annually so I would feel much safer being clipped in with the tallest parts of my roof being about 30' feet up and thinking the aluminum could be slippery.
I do not know details of your situation as far as the roof shape or flashing design. Sometimes anchors can be concealed by a flashing but ultimately you want them secured into the structure, not just the roof or roof deck. You should be able to find a stainless steel anchor that will be rust resistant and compatible with the aluminum.
Thanks for the response, Todd.
My contractor said he hasn't put an anchor on a house before and while he thinks he can make it work, for a roof that is supposed to last (and costs so much) I want to know that this anchor isn't going to be a problem. It is that uncommon? How do workers comply with OSHA if it isn't common to have anchors on standing seam roofs?
I think they are getting to be fairly common on commercial roofs but less common on residential. I do not have any photos of installed anchors unfortunately. There's a Facebook group called Metal Roof Installers. If your contractor joins that group and posts a request for information and photos of anchors, I think they will be helpful. Any sort of anchor will be a penetration through the roof. But, there are lots of other penetrations in most roofs as well. It can be done. Anchors are a bit easier in fact due to being at the ridge.
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