this item is only sold by the pallet of 12
You are asking for how many bags of product cover a 46’x27’ area. If that is a solid area, you will need to cover 1,242 square feet. There is 59.7 square feet per bag. If the math is correct, you will need 21 bags.
R3.9 per inch of thickness.
The Acoustic performance is stated on the Technical Data Sheet. NRC at 3" is 1.05. Click on this link to open data sheet https://www.rockwool.com/siteassets/o2-rockwool/documentation/technical-data-sheets/residential/safensound-fire-and-soundproofing-insulation-techdata.pdf
ROCKWOOL do not publish or brand the R Value as interior partitions and between floors have no R value requirement for code. How ever we do test the product and it will provide an R3.9 per inch. 3" would be R11.7
19 x 8 = 152sf Each bag covers approx. 60sf Approx 3 bags
As Mark advised below in the community response its a vapor open product. COMFORTBATT is applicable product and will provide the highest R value per inch of thickness. Note you require a 2 x 8 or deeper cavity depth to accommodate the 7.25" R30 material
ROCKWOOL products do contain trace amounts of phenol formaldehyde however, majority of it is cured off during the manufacturing process. Batt products are Green guard gold certified and ensures the product is acceptable for use in environments such as schools and healthcare facilities. For more information email us direct email@example.com
When we bought this, it was on a *significant* sale, like 50% off or more--I think Home Depot was clearing some out. Really lucky timing.
Its typically dictated by your local code requirement. You can increase the R Value by layering the product if you have the cavity depth to accommodate a thicker layer. For more details on your questions please contact us direct. firstname.lastname@example.org