Insulation Attic Fiberglass Vs Rockwool

Mineral wool insulation has superior sound deadening properties.

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. Both types are popular and readily available. Fiberglass has an r value of 2 2 2 7 per inch while rockwool has an index of 3 0 3 3 per inch. If you plan to add thermic insulation to your room as well consider this.

Hi 1930 s 18 inch philadelphia suburb home w 18 thick stone walls and 18 thick stone foundation. One you will need to choose the material fiberglass mineral wool cotton or sheep s wool. And two you will have to decide whether to use batts or rolls. On a square foot basis mineral wool batts cost more than fiberglass batts.

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 or rockwool typically costs more per inch than fiberglass insulation. Comparing the facts no matter what the building. Prices can vary at any time but expect to pay around 0 10 more per inch for mineral wool versus fiberglass.

Rock wool generally costs more than fiberglass insulation. Fiberglass insulation costs 25 to 50 percent less than mineral wool. 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. February 29 2020 at 1 16 pm.

Fiberglass insulation for a 2 6 wall costs between 57 cents and 72 cents per square foot. As an example the r 15 mineral wool costs about 80 per sq. 35 thoughts on mineral wool vs. General use of rockwool and fiberglass.

Attic had 4 12 inches of blown insulation cellulose not sure if fiberglass also that was getting into recessed lights of 2nd floor. 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. Mineral wool insulation for the same wall runs about 1 to 1 10 per square foot. Johns manville tempcontrol roxul comfortbatt and thermafiber ultrabatt.

Attic and pipe insulation applications. Cellulose insulation comes in three types and is used exclusively for attics and wall cavities. This makes rockwool a little better at insulating than fiberglass. Fiberglass and rock wool absorb less than 1 percent of their weight whereas cellulose absorbs 5 20.

Both materials are versatile and popular choices among. It has a density of 1 7.