What is R12 insulation used for?
Description. This Johns Manville insulation was created for walls and attics to improve energy and acoustic efficiency. You will appreciate the flexible material made of fibreglass without formaldehyde and resistant to fire and mildew.
What is a good r number for insulation?
between 6.1 and 7
Currently, the recommended R value for attic insulation is between 6.1 and 7, a combination of thickness and conductivity.
