Unvented roof deck
I am finishing an existing work shop with a low pitch vaulted ceiling. There is no practical way to vent the ridge. Since it is a shop, no code applies to r -values, but we want the most we can achieve.
Here is what I am working with:
Mixed climate ( Central Virginia)
2 x 12 rafters 24″ o.c. 5/8 osb roof deck, full coverage ice shield and 50yr shingles 2 1/2 / 12 pitch
~ 685 sq. ft. ceiling area
2 x 4 sidewalls 16″ o.c.
Concrete slab floor ( vapor barrier or insulation under is unknown)
Sheetrock is proposed for the final wall covering
Questions : Does it matter ( to a unvented roof assembly ) that there is no continious climate control ?
What is the most practical approach and products to use ?
The only methods I have used in the past is a flash and batt on exterior walls. I have yet to do non-vented roof assembly.
Thank you for your time, JTN
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