Cellulose vs. Spray-Foam Insulation in Attic
The situation: I am a building owner, not a builder. New Hampshire climate – two story commercial office building circa 1952. Pic enclosed… First floor brick facade, second floor are gable sides with slate roof on longest sides, brick wall on shortest sides to flat membrane rooftop. The membrane portion is about to be replaced with TPO and 2” tapered polyiso just to shed water to the gable sides and off. AC ducts are in the attic servicing the second floor that will soon carry heat as well from retrofitted exterior heat pumps, to replace old exterior ac condensers. Attic space is a crawl space approximately 36” making for difficult access. Appears to be 2×8 or 2×10 rafters/members. There are three steel girder-style I-beams from brick wall to brick wall within the space for load. Old degraded batting insulation on attic floor between joists.
The question: Given above situation, loose blown cellulose, or spray foam?
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