Installing Manville Faced Fiberglass Batt Insulation In Attic Floor

Use a sharp utility knife.

Installing manville faced fiberglass batt insulation in attic floor.

If you are using unfaced batts place the insulation into the cavity making sure that it is the correct size and fits snugly at the sides and ends and does not protrude in the back. Kraft faced or paper faced insulation comes in batts and long rolls. Don t double it over or compress it. Roll insulation is best for floors ceilings and roofs with a long joist or rafter bays and for tall walls.

Be sure the paper surface faces out into the room. Johns manville r 49 kraft faced fiberglass insulation batt 16 in. Our unfaced fiberglass insulation is available in pre cut batts for standard sized wall cavities and in rolls that can be cut to fit any size cavity. 8 bags model k4916.

If your attic floor has no insulation install faced batts or faced rolls between each joist with the moisture barrier facing down against the drywall or plaster ceiling below. Buy 15 or more 52 63. Owens corning r 30 ecotouch pink metal framed foil faced fiberglass insulation batt 16 in. Install batting between the attic s floor joists.

Get free shipping on qualified attic fiberglass insulation or buy online pick up in store today in the building materials. Jm unfaced formaldehyde free fiberglass insulation offers r values ranging from r 11 to r 38 as well as effective thermal and noise control. 10 bags model k1263. Johns manville r 21 kraft faced fiberglass insulation batt 15 in.

The batting material must be faced and at least as thick as the joists are wide so the batting is nearly flush with the top of the joists. All kraft faced insulation is easy to cut with a sharp utility knife or insulation knife. The shower has two outside walls. If there is already insulation between the joists increase the r value by installing unfaced roll insulation right on top.

The batts are precut to fit into cavities on standard 8 foot high walls. I have install new insulation becasue of a valve leak got the old stuff wet. Fsk 25 flame resistant faced insulation. I live in the sacramento valley area which gets very hot and dry in the summer doesn t get to cold in winter but foggy damp days in the 30 3 and 40 s.

So i am not sure which way to install the new insulation. Cover the unfaced fiberglass wall insulation with a 3 mil polyethylene vapor barrier. If the insulation is too long cut it to fit properly. Johns manville r 13 106 56 sq ft faced fiberglass batt insulation 15 in w x 93 in l owens corning r 13 40 sq ft single faced fiberglass roll insulation 15 in w x 32 ft l dow restartable straw gaps and cracks 12 oz spray foam insulation.