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Thriftyone
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# Posted: 23 Jul 2013 01:13
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I just completed the framing and sheathing of my 14 x 16 cabin in Northern Minnesota. I have hand framed 2x6 rafters 2' o.c. with 1/2" OSB sheathing. My plan is to cover with 30lb tar paper and Menards Pro-Rib metal roofing over the top. The ceiling is vaulted and I of coarse plan to insulate. would there be anything wrong with out venting? its a 10/12 pitch. any thoughts would be appreciated. Thanks!
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creeky
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# Posted: 23 Jul 2013 08:57
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If your roof is in the sun and you have ridge venting you will keep the transfer of heat into the building down significantly. a reflective layer below the metal helps also.
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ICC
Member
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# Posted: 23 Jul 2013 09:51 - Edited by: ICC
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It's not the fact that you have a metal roof that means you do or do not need to vent it. It is what the humidity from within the living space might do. A roof can be built vented or un-vented. Some builders screw it up when they do either. Rather than reproduce it all here try the following links
http://www.greenbuildingadvisor.com/blogs/dept/building-science/lstiburek-s-rules-ven ting-roofs
http://www.buildingscience.com/documents/published-articles/pa-crash-course-in-roof-v enting
Joseph Lstiburek is the guru of venting and insulating.
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