I tried searching past threads but came up short. I have old cellulose in attic, and want to increase insulation. Ceiling is sheet rock over plaster. I can get a good price for soem rigid foam, but if I apply that perpendicular to the ceiling joists, will I trap moisture underneath? I could leave a small gap between boards, and not get that much air infiltration ( convection) Thanks.
Bug and Defect Report Email Address
NOTICE: Thank you for your continued patience with the persistent bugs affecting the JLC Online Forums. We've setup a special email address for reporting issues and defects. Reports will go directly to the assigned IT team members. Please include screenshots if you can. There were some widespread issues over the past weekend which have been resolved. However, we know that various error pop-ups are still occurring during post composition and at other times. Thanks again. Here's the email address:
Rigid foam over cellulose