The facing on faced insulation functions as a vapor retardant. If you need a vapor barrier and also your insulation is unfaced, you need to address it with a polyethylene movie. To guage blanket installation, you can measure batt thickness and check for gaps concerning batts and among batts and https://cieling-insulation73617.blogdiloz.com/32730337/insulation-things-to-know-before-you-buy