Controlling Moisture With OSB Sheathing and Steel Roof / Siding
2021年7月14日 · 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.
Unvented airtight flat steel roof without spray foam?
2024年11月11日 · It’ll have a drywall ceiling suspended by joists and holding up as much fiberglass as space allows below the corrugated steel roof. That roof gets blazing hot more than it ever gets cold but it likely can lose a lot of heat at night to night-sky radiation and if the conditions are just-so, could even dip below the dew point.
Would like to know if applying rigid foam under metal roof is ...
2011年4月4日 · 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 to construct my roof in the following …
Fastening Metal Roofing to Purlins - GreenBuildingAdvisor
2021年8月29日 · 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 ...
How to Install Rigid Foam on Top of Roof Sheathing
2015年4月3日 · 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.
Is sheathing a metal roof necessary? - GreenBuildingAdvisor
2013年2月21日 · I'm a carpenter here in Asheville,NC zone 4/5 and trying to design a home for myself so I need to make it as inexpensive and green as possible. I'm thinking of a shed roof using flat trusses with blown cellulose to R-60 and a metal roof. Of coarse, there will be eave and "ridge" vents. So do I need to sheath the roof for metal or will just using purl-ins work. My main …
Fastening strapping for steel roof - GreenBuildingAdvisor
2016年2月2日 · For my simple gable roof, I will be installing exposed-fastener steel roofing atop 2×4 strapping atop Grace Tri-Flex underlayment atop OSB sheathing atop trusses 24″ oc. Everything I’ve read indicates that screws would be best for fastening the strapping, as they offer far greater withdrawal resistance than nails, but I haven’t found any recommendations on the …
Staying Cool with a Metal Roof - GreenBuildingAdvisor
Dana Dorsett | May 21, 2012 04:29pm | #1. Cool roofs are not for high-slope roofs in cool climates Using a high solar reflectivity/moderate deep IR emissivity approach the steady state and peak roof temperatures under summer sun can can be brought down considerably, and even in a well insulated attic the roof can be a large fraction of the cooling load.
Corrugated metal indoors (as ceiling/wall panel)
2013年6月19日 · Dana, You wrote, "Steel on its own isn't a recognized ignition barrier." I disagree. In sections R314.5.3 and R314.5.4, the IRC defines an ignition barrier as one of six permissible materials: 1 ½-inch-thick mineral fiber insulation; ¼-inch-thick wood structural panels (e.g., plywood); 3/8-inch particleboard; ¼-inch-thick hardboard; 3/8-inch-thick gypsum board; …
Polyiso under metal roofing - GreenBuildingAdvisor
2016年1月26日 · My plan was to cut and cobble 3" polyiso in rafter bays. The build up would be tongue and groove, 2x2 nailers with 1.5" polyiso in between nailers for thermal break of rafters, 6mil Vapor barrier, 2 3" sheets of polyiso with very thick paper fiberglass faced, 3" vented airspace, 2x4 purlins, foil faced bubble wrap directly under metal roofing.