Insulation Attic Fiberglass Vs Rockwool

Mineral wool will not support or grow mold or mildew and it is also a fire resister and a fire retardant.

Insulation attic fiberglass vs rockwool.

Fiberglass insulation costs 25 to 50 percent less than mineral wool. Fiberglass insulation s says. Johns manville tempcontrol roxul comfortbatt and thermafiber ultrabatt. It has a density of 1 7.

Fiberglass has an r value of 2 2 2 7 per inch while rockwool has an index of 3 0 3 3 per inch. February 29 2020 at 1 16 pm. And two you will have to decide whether to use batts or rolls. In the unfortunate event that a fire starts in an attic or in between walls where mineral wool insulation is used it will actually slow and retard the progression of the fire.

Mineral wool insulation or rockwool typically costs more per inch than fiberglass insulation. General use of rockwool and fiberglass. Attic and pipe insulation applications. Batts are pieces of blanket insulation that are pre cut to manageable sizes 15 24 inches wide by 48 or 93 inches long while rolls are strips of insulation similar to batts in width.

Mineral wool insulation has superior sound deadening properties. Prices can vary at any time but expect to pay around 0 10 more per inch for mineral wool versus fiberglass. Fiberglass and rock wool absorb less than 1 percent of their weight whereas cellulose absorbs 5 20. This makes rockwool a little better at insulating than fiberglass.

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. Fiberglass insulation for a 2 6 wall costs between 57 cents and 72 cents per square foot. Be aware though that. Mineral wool insulation for the same wall runs about 1 to 1 10 per square foot.

Both types are popular and readily available. Attic had 4 12 inches of blown insulation cellulose not sure if fiberglass also that was getting into recessed lights of 2nd floor. Rock wool generally costs more than fiberglass insulation. There are at least three brands of mineral wool batts for thermal wall insulation.

Hi 1930 s 18 inch philadelphia suburb home w 18 thick stone walls and 18 thick stone foundation. On a square foot basis mineral wool batts cost more than fiberglass batts. Comparing the facts no matter what the building. Cellulose insulation comes in three types and is used exclusively for attics and wall cavities.

35 thoughts on mineral wool vs. As an example the r 15 mineral wool costs about 80 per sq.