Converting Attic to Conditioned Space
In the process of planning a remodel on a house built in the 1950s and looking into my options for converting the attic into a conditioned space, but keeping it as a vented roof.
The house has soffit and ridge vents on an existing roof that is only ~5yrs old The roof is a basic composite roof with a tar paper underlayment as opposed to a membrane which has me concerned about having spray foam applied directly to the underside of the roof.
I have been considering an insulation assembly that would be a combination of foil-faced poly iso sheets offset from the roof deck 1.5in and then close cell spray foam to build out the insulation thickness and bond the assembly together.
My thought process is it allows the existing soffit & ridge vents to continue to function, adds a radiant barrier and the open space would allow any potential roof leak some means of ability to dry.
Any pitfalls to using such an assembly?
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