G
L
O
S
S
A
R
Y
,
C
O
N
T
.
35
FORCE/3
3.0 & 4.0 DP
A Glossary, Cont.
COMMON INSULATION VALUES
Material
Thickness
R-Value
Air Space
1”
1.01
Cellulose loose fill
1”
3.70
Celotex
1”
3.03
Concrete block
8”, hollow
1.11
Fiberglass batt
3
1
⁄
2
”
11.0
Fiberglass batt
8”
19.0
Fiberglass loose fill
1”
2.2
Rockwool batt
3
⁄
4
”
11.0
Rockwool loose fill
1”
2.60
Plywood
1
⁄
2
”
.62
Polyurethane board
1”
6.25
Vermiculite
1”
2.13
G
L
O
S
S
A
R
Y
,
C
O
N
T
.