Installing Manville Faced Fiberglass Batt Insulation Attic Floor

I have install new insulation becasue of a valve leak got the old stuff wet.

Installing manville faced fiberglass batt insulation attic floor.

Lengths for easy installation in 24 in. 10 bags model k1263. R 49 kraft faced batts come in pre cut 48 in. View the owens corning 2x6 wall floor insulation 75 19 75 19.

R 49 kraft faced insulation is formaldehyde free fiberglass insulation protected on one side with moisture resistant kraft facing. Use a sharp utility knife. Just buy un faced batts install them to grade 1 and build your air and moisture control systems in another layer big separate discussion. 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. That s how the barrier is made effective. All kraft faced insulation is easy to cut with a sharp utility knife or insulation knife. Don t double it over or compress it.

The damn facing obscures your work slowing down the installation and resulting in a poor insulation grade. So i am not sure which way to install the new 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. 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.

The batts are precut to fit into cavities on standard 8 foot high walls. Faced insulation has flanges on the outside of the batt that need to be stapled to the wall studs and joists. Without stapling moisture still has a path into the room. Johns manville r 21 kraft faced fiberglass insulation batt 15 in.

On center 2 in. Fsk 25 flame resistant faced insulation. Framing attics and ceilings. 1 bag covers 48 sq.

The shower has two outside walls. Buy 15 or more 52 63. It s also important that there be no air pockets in the insulation as this is where the cold spots spring up in rooms. If the insulation is too long cut it to fit properly.

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. And that s what s going on when you attempt to hang faced fiberglass. Roll insulation is best for floors ceilings and roofs with a long joist or rafter bays and for tall walls. 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.