Apr 19, 2017 · The main concern seems to be with moisture condensing under the roof when cool night air drops below the dewpoint of air in the attic. To this I question: 1. Is there a significant difference between a roof with shingles and sheeting vs. a steel roof? Why wouldn’t the underside of a conventional shingle roof condense moisture the same way? 2.

Aug 29, 2021 · The orignal plan was to utilize shingles to limit costs, however after analizing the numbers a little further and accounting for the cost of removing the solar arrays to replace roofing 30-35 years from now it became apparent that if I could design the steel roof to limit the cost by eliminating the plywood deck it becomes a much better cost ...

Apr 3, 2015 · Roof 2> 1970's building, steel deck Again, the original roof is intact. The building was purpose built for a high speed web-offset press with huge ink drying ovens & motors generating heat, so the idea was to get the heat OUT of the building, not trap it inside.

Jul 14, 2021 · Dear Martin, Thank you GBA for this great resource. I built a 700 sq ft house. Zone 5. Steel siding and steel roof. The roof has a 3/4 inch air gap from strapping over the tar paper and osb. The siding is attached directly to the tar paper and OSB. We’ve had some condensation issues, I think, especially on the north wall around outlets.

Nov 8, 2010 · Galvanized steel or terne is not a good roof for potable water catchment, or any roof with lead flashing. Painted metal is OK, through natural non-reactive materials like slate, tile, copper and cedar are better. Surprisingly, a lot of rainwater is collected from …

Jan 7, 2015 · In an unconditioned attic space above a residence, most of what I've read on GBA seems to agree that steel sheet roofing might develop some condensation on its underside, even if the ceiling below is properly sealed and insulated, just from the outdoor air warming faster than the surface of the metal, and this is part of the argument for installing steel sheet roofing over underlayment and ...

Apr 4, 2011 · I will be replacing the old corrugated metal roof on my house with a new Standing Seam style metal roof. I am doing this in preparation for installing Solar panels, and I will be doing rainwater harvesting. I will be using a high reflective coating on the metal roof to reduce inductive heating of the attic and thereby the house. I would like …

May 29, 2014 · Lets pretend the roof design details are conventional and so the roof deck sheathing will be 5/8" to 3/4". Many metal roofing dealers specify minimum of 7/16" sheathing. Design depends on type of metal roof: exposed or hidden fasteners; board and batten (pan and ridge) panels; shake and shingle panels; panel or tile system; standing seam; etc.

Jul 15, 2018 · I'm installing 29 ga Classic Rib steel panels on a simple gable roof with a 4:12 pitch. The panels are 12'9" long from the peak to the end of a 2' overhang. They are attached to 2x4 purlins over underlayment and OSB sheathing. I'm in central Arizona.

Dec 19, 2020 · I am constructing a post frame conditioned shop building with blow in cellulose on the OSB ceiling. Above this I will have the metal roof on 2×4 purlins. This area is pretty humid. In my small metal storage sheds I had to remove the roof and put a layer of bubble foil insulation to keep condensation from falling onto my tools.