I live in Northern Virginia. I am trying to resolve a dispute between my insulation contractor and the city engineer.
I plan on having open cell spray foam installed in the rafters of the top level of my home.
– The city engineer stated that I need to install a ridge vent and baffles that run the entire length of the roof from the ridge vent to the soffit vents. Then once inspected and approved, I can have the spray foam contractor spray the insulation over the baffles.
– The Contractor states that the engineer does not understand the technology and the the
spray foam should go directly against the sheathing. The contractor also states that the spray foam should form an air tight barrier in the entire roof deck so that no air can escape.
After reading the IRC Section 806.4, it seems that the contractor is right.
Can you tell me which party is correct?
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