Insulation:

Heat is lost from most buildings as indicated: 10%  Air leakage and infiltration 23%  Windows & Doors 27%  Walls 40%  Ceilings

CertainTeed Kraft-Faced Fiberglass Insulation is ideal when a vapor barrier is needed for attic, exterior walls, floors or crawl space.

Big L Lumberland stocks thicknesses of 3-1/2", 3-5/8", 6", 10" and 12" in widths of either 15" or 23". (Not all sizes available in all widths.)

3-1/2" R-Value is 11
3-5/8" R-Value is 13
6" R-Value is 19
10" R-Value is 30
12" R-Value is 38

Dow Styrofoam Sheathing has superior moisture resistance, contains no fiberglass, so no itch, and offers unbelievable strength.

Big L Lumberland stocks 4' x 8' sheets in 3/4", 1" and 2" thicknesses.

Nu·Wool Cellulose blown-in Insulation resists fire, moisture and rodents. Nu-Wool insulation is also a good sound deadener (blower rental available).

Does your attic insulation look like this?	This is proper insulation!
Heat loss thru and around ceiling joists	No heat loss thru ceiling joist