FGH-V P2 Balcony Window Roof Opening:39" x 101" it conforms to ASTM E84

it conforms to ASTM E84 Class 1 (A) fire ratings and offers dependable performance in demanding environments

but definitely worth the purchase to use alongside any GREAT STUFF product

Rockwool COMFORTBATT R15: This is a lower R-value version of the COMFORTBATT insulation

Highest coverage

FGH-V P2 Balcony Window Roof Opening:39" x 101" it conforms to ASTM E84An innovative, large roof window, in which the sashes create a functional balcony in the loft. The upper sash is opened steplessly upwards. The bottom sash tilts forwards to a vertical position, allowing free access to the balcony recess. It is enough to take a few steps in order to get outside and feel the warmth of the sun rays, refreshing breeze or admire beautiful views. The upper sash is opened steplessly upwards, up to an angle of 45. The side