Thank you for the interest in the JM Kraft Faced Fiberglass Rolls. Unfortunately, this type of insulation should not be left exposed to elements such as water. The kraft facing is also combustible, another reason why it can not be left exposed. You might want to check with the manufacturer of the hot tub for an insulation solution, as our product is not the best fit for this application.
About 672 sq feet. Take out windows and doors.
We recommend installing the vapor barrier insulation in a crawl space with the vapor barrier against the ground to prevent moisture from the ground getting into the crawlspace. However, putting another vapor barrier on top of the insulation will create moisture problems with insulation being sandwiched between two vapor barriers.
yes ,much easier ,and use staple gun ,so easy
Hello Blou, Thank you for your interest in Johns Manville's fiberglass building insulation. Johns Manville manufactures fiberglass batts that are either white or brown in color. There is a binder or glue that holds the fibers together which is either white (acrylic) or brown (bio based). Although the products have a different appearance, they both perform the same at a given thickness and density. Best regards, Doug Fast
The square footage of each roll is (15"*470")/144 = 2500 sqft/roll. You have 1050 sqft of space to cover. 2500/1050 = ~3 rolls.
Paper side down
The paper always faces the interior of the home no mater if it is installed in the floor, wall or attic.