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Home > Main Index > Markets > Construction Applications > Loose-Fill Insulation > U Values & R-Values

Perlite Loose-Fill Insulation

Concrete Block Walls---U-Values & R-Values

   

Block Only

Block Thickness in Inches

Density of Block

 Uninsulated Insulated
R U R U

6

80 pcf
Lightweight

 2.64

.38

 6.75

.15

125 pcf
Sand & Gravel

 2.05

.49

 3.86

.26

8

80 pcf
Lightweight

 2.86

.35

 9.07

.11

125 pcf
Sand & Gravel

 2.21

.45

 5.06

.20

10

80 pcf
Lightweight

 3.00

.33

 11.02

.09

125 pcf
Sand & Gravel

 2.31

.43

 5.95

.17

12

80 pcf
Lightweight

 3.12

.32

 13.44

.08

125 pcf
Sand & Gravel

 2.38

.42

 7.17

.15


Values given are approximate and include the effect of inside and outside air film resistances

Information given herein is from sources considered reliable, but no guarantee of accuracy can be made or liability assumed.  Your supplier may be able to provide you with more precise data.  Certain compositions or processes involving perlite may be the subject of patents.
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