I noticed within an attic area that the homeowner has R-30 Batt Insulation and also has blown in Foam insulation. I was under the impression that the attic become air condition space when the foam is applied and all the openings within the attic are sealed.
How can the attic breath if there is Batt insulation on the ceiling and foam insulation on the truss work?
All knowledge in this area is appreciated.
Thanks in advance for your help.