Flash and Batt in Reverse – Modular
cp808
| Posted in Energy, Heating & Insulation on
Working on a modular residential project in CZ 6. In modular construction though, the batt is installed on the exterior facing edge of sheathing and closed-cell spray foam on the interior facing edge of the gypsum (serving as vapor barrier). Would this flash and batt insulation in reverse cause any problems with moisture transfer?
Also, if we could, does it make sense to add an inch of Poly iso or Roxul on the outside of the sheathing as a thermal break to the outside to increase R value and add a thermal break?
Replies
Czech republic?
Climate Zone.
If sprayed properly you shouldnt have moisture transfer past the closed cell but I am not sure what that will do to your fiberglass outside.
Whats the reason for insulating in that order?