Looking at new construction and wanted to get some feedback on a simple square roof with a .5:12 pitch using a standing seam metal roof. There are a few manufacturers that provide products with that low of a pitch. The home will be in SE North Carolina along the coast, but not on the water.
Here are my layers
Sheathing (5/8 OSB + Carlisle WIP 300HT) OR Zip - looking at pricing
4" Foam panels (iso or eps)
Carlisle WIP 300HT
1" x 4" furring strips with gaps for air flow
Standing seam metal roof (the roof is 60’ in length so a few pieces are needed per run)
The 2nd layer of WIP 300HT may be overkill, but that was done on a blog by Matt Risinger and he says that is a best practice in Texas.
Thoughts on the layers - missing/better alternatives/overkill?
Thanks - Don