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there is currently a stitch down roofing sysytem on a wearhouse on 2' oc perlins. ther have had a tar coating sprayed over yet still leaks. I have suggested installing new 2x4 battens on top of the existing roof (directly over the old) and installing a standing seam, simmilar to mcelroys maxima. Is this to much weight, and what is the limit on this kind of situation.
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https://www.metalroofing.com/spirit/comment/4842/find/
You will need to have a structural engineer do an analysis if you are concerned about weightloads. However, putting a new metal roof over an old one is not unheard of for this type of industrial property.
Roofhugger makes metal purlins specifically for this type of application.
I would also suggest contacting McElroy with your plan and seeing what they say.
12/16/2004
Or copy this URL: https://www.metalroofing.com/spirit/comment/4842/find/12/16/2004
Or copy this URL: https://www.metalroofing.com/spirit/comment/4843/find/