I live in South Florida and have an uninsulated open ceiling in a laundry room that used to be an outdoor laundry, it has since been surrounded by a finished living area. It is open to the roof with 6” trusses on 16” centers. The room has a block wall on one side and stud walls to the ceiling on the others so there is no way to vent the space from eaves to ridge. It gets very hot in there and I want to insulate and drywall the ceiling. Should I fill the joist space with insulation or should I leave a gap between the insulation and the roof deck? The roof is very low slope with asphalt roll roofing.
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