How thick of SIP is too thick? > GreenBuildingTalk - Green Building Forums on Insulating Concrete Forms (ICF), Structural Insulated Panels (SIP), Radiant Heating, Geothermal Heat Pumps, Solar Power

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lambabbey

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Posts:71

03/17/2008 2:18 AM
Dick, I need as much support up on the roof because I've got one side of it covered with 2-dozen PV panels and an Apricus system. I'd only go with the polyurethane SIPs if someone were already making an 8-1/4". I wouldn't want to drop from a 10-1/2" EPS to a 6-1/2" polyurethane SIP. I can't help but think that I'd be giving up too much support going to the 6 1/2". John

John A Gasbarre Lamb Abbey Orchards PO Box 623 Union, ME 04863 E-mail: orchard@lambabbey.com

SteelSipMan User is Offline

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Posts:51

03/17/2008 8:08 AM
John; What part of the country are you building in? 6" EPS steel sips will easily span 18ft. unless you have a heavy snow load plus- steel sips can be used with as much as a 4ft, unsuported eave overhang. and the underside is already a prefinished soffit

lambabbey

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Posts:71

03/17/2008 2:29 PM
Posted By SteelSipMan on 03/17/2008 8:08 AM John; What part of the country are you building in? 6" EPS steel sips will easily span 18ft. unless you have a heavy snow load plus- steel sips can be used with as much as a 4ft, unsuported eave overhang. and the underside is already a prefinished soffit I'm building in midcoast Maine, 20 miles from the ocean, USDA Zone 5. John

John A Gasbarre Lamb Abbey Orchards PO Box 623 Union, ME 04863 E-mail: orchard@lambabbey.com

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