5.1 : Building Materials/Insulation




5.1.3 Thermal Performance of Insulation
R-Value per Inch (1) R-Value per Inch (1)
Fiberglass (2) Perlite/Vermiculite
Batts 3.1 - 4.3 (3) Loose-Fill 2.1 - 3.7
Loose-Fill 2.5 - 3.7 Foam Boards
Spray-Applied 3.7 - 3.9 Expanded Polystyrene 3.9 - 4.4
Rock Wool (2) Polyisocyanurate/Polyurethane 5.6 - 7.0
Loose-Fill 2.5 - 3.7 Phenolic 4.4 - 8.2
Cellulose Reflective Insulation 2 - 17
Loose-Fill 3.1 - 3.7 Vacuum Powder Insulation 25 - 30
Spray-Applied 2.9 - 3.5 Vacuum Insulation Panel 20 - 100
Note(s): 1) Hr-SF-F/Btu-in. Does not include the effects of aging and settling. 2) Mineral fiber. 3) System R-Value depends on heat-flow direction and number of air spaces.









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Sources:

ASHRAE, 1997 ASHRAE Handbook: Fundamentals, p. 24-4, 22-5

DOE, Insulation Fact Sheet, Jan. 1988, p. 6

Journal of Thermal Insulation, 1987, p. 81-95

ORNL, ORNL/SUB/88-SA835/1, 1990

ORNL, Science and Technology for a Sustainable Energy Future, Mar. 1995, p. 17

ORNL for vacuum insulation panel