Insulation Attic Fiberglass Vs Rockwool

Mineral wool insulation or rockwool typically costs more per inch than fiberglass insulation.

Insulation attic fiberglass vs rockwool. 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. General use of rockwool and fiberglass. Fiberglass insulation s says. Fiberglass and rock wool absorb less than 1 percent of their weight whereas cellulose absorbs 5 20.

Johns manville tempcontrol roxul comfortbatt and thermafiber ultrabatt. Be aware though that. Comparing the facts no matter what the building. This makes rockwool a little better at insulating than fiberglass.

Cellulose insulation comes in three types and is used exclusively for attics and wall cavities. 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. There are at least three brands of mineral wool batts for thermal wall insulation.

February 29 2020 at 1 16 pm. On a square foot basis mineral wool batts cost more than fiberglass batts. Both materials are versatile and popular choices among. Both types are popular and readily available.

Mineral wool insulation for the same wall runs about 1 to 1 10 per square foot. Attic and pipe insulation applications. Prices can vary at any time but expect to pay around 0 10 more per inch for mineral wool versus fiberglass. As an example the r 15 mineral wool costs about 80 per sq.

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. Fiberglass has an r value of 2 2 2 7 per inch while rockwool has an index of 3 0 3 3 per inch. It has a density of 1 7. Fiberglass insulation costs 25 to 50 percent less than mineral wool.

Fiberglass insulation for a 2 6 wall costs between 57 cents and 72 cents per square foot. Mineral wool will not support or grow mold or mildew and it is also a fire resister and a fire retardant. 35 thoughts on mineral wool vs. 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. If you plan to add thermic insulation to your room as well consider this.