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Space between insulation and sheathing?


DavidFoster's Avatar
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06-03-04, 02:49 PM   #1  
DavidFoster
Space between insulation and sheathing?

We are insulating an 1870's outbuilding to use as a year-round office space. The building is 15' x 20', one room, gable roof with collar ties. The walls have new studs 16" on center, and we will insulate with standard fiberglass and vapor barrier. The roof is framed with 2"x5" rafters, and we intend to insulate and sheetrock the inside of the roof, leaving the collar ties exposed.

We plan on installing strapping perpendicular to the rafters, and fastening the insulation, vapor barrier and sheetrock to the strapping. This should give us roughly two to three inches of space between the insulation and the roof sheathing.

Is this enough space for ventilation? (Ventilation will be a ridge vent and soffit vents.)

Thanks in advance for any advice!

David

 
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Ed Imeduc's Avatar
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06-05-04, 04:24 PM   #2  
Id say yes. You could put up the rafter foam vents as they are called. To make sure the insulation dont touch the roof boards there if you want.


ED

 
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