Compare merits of dense pack fiberglass vs dense pack cellulose in walls + loose pack in ceilings
Dense pack fiberglass is now easily available from reliable contractors and carries a higher R value than cellulose. Cellulose is more environmentally friendly. Some assessments suggest cellulose does better at higher depths and is able to absorb moisture better. What other things should be taken into consideration when choosing cellulose vs fiberglass dense pack for a wall design that includes 2×6 walls with 4″ polyiso (could reach R45 which is “high performance” in VT with fiberglass and not cellulose) and planned 2 ft loose pack in ceilings? Thanks!
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