Mid-century Modern home has flat torch-down roof. There are about 10" between roof decking to interior ceiling. Insulation (mineral wool) rests on the interior ceiling and is approx 4 " thick and provides minimal insulation (R-11?). This space is currently accessible only by removing facia/rim joist on soffit. (Roof is relatively new). Roof has both soffit vents and top vents.
Is it safe to fill cavity completely with additional insulation and close the venting ports so it's a non-vented space?
Welcome any ideas to improve R-value up there without removing roof or ceiling.
Is it safe to fill cavity completely with additional insulation and close the venting ports so it's a non-vented space?
Welcome any ideas to improve R-value up there without removing roof or ceiling.