Rock Wool Pouring Wool Attic Insulation

I had open cell spray foam insulation in my attic and after 8 months it still had a chemical smell i posed about this on this forum.

Rock wool pouring wool attic insulation. The contractor removed it and suggested to replace it with a 3 inch hardboard insulation and 5 5 inch rockwool on the rafters. Mineral wool batts for 2 4 walls have an r value of 15 while a standard fiberglass batt made to fit in a 2 4 wall has an r value of 11 or 13. Mineral stone wool insulation batts are slightly better insulators than the off the shelf fiberglass batts sold at most lumberyards and home centers. Foam insulation great stuff batt insulation rockwool insulation heat distribution shield fireproof envelopes.

Existing insulation 5 fiberglass 4 plywood 5 wood 5 insulation features. Rock wool generally costs more than fiberglass insulation. Rockwool stone wool insulation can be used to create an energy efficient home when insulating an unconditioned attic space. Fiberglass insulation rated at r 15 to fit a standard 4 inch wall costs around 0 50 per square inch as of 2013 according to fine.

Fire block rated 4. Trying to keep the attic not vented since we have the hvac system in there. Installing stone wool insulation in the attic space of a low slope roof can provide increased thermal efficiency.