Roofing/Standing seam metal roofing installation
We have a project that has steel trusses and has a 1-1/2" deep structural steel deck diaphragm installed over the steel trusses. (Structural steel deck is a B type steel deck with flutes and groves and had to be installed for seismic reasons) We want to install a standing seam roof over the structural deck. The attic under the steel deck is a cold attic. Our insulation is at the bottom of the steel trusses. Our questions are: Do we need a membrane (ice and water shield) under the standing seam? Is there a code requirement to install a membrane under the roofing? It would be difficult to install the membrane with the flutes of the structural deck? Can we just install the standing seam directly over the structural deck? Would there be the possibility of condensation in the grooves of the structural deck? The grooves of the structural deck run perpendicular to the slope of the roof (3:12 slope). We just need an expert opinion on the best installation for installing standing seam over the structural metal deck. Hope you can help.
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Although i have install both structural steel roofing and standing seam metal roofing i have not installed the standing seam over the structural steel roofing. I would check with the manufacture and the local building inspectors to ensure this is a possibility. I know typically the structural is designed more for a flat roof and the standing seam only be used on a sloped roof.
Sorry I could not be more help to you...
ARAC Alliance Restoration and Consulting