Copyright © 2002 Competition Construction
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The U-factor/U-value:
Lower Is Better
Lower Is Better
•Lower numbers
mean less heat flow and
better thermal performance
= higher savings on your
energy bill.
•the typical
U-factor/value of vinyl
windows ranges from 0.3 to
0.5.
•The
U-factor/values of wood windows
fall in the same range,.
•Aluminum-clad
and vinyl-clad windows
range from 0.4 to 0.6.
•Aluminum windows
range from 1.0 to 2.2.
U-Factor
/ Values
(Lower is Better!)
.3 to .5
.3 to .5
.4 to .6
1 to 2.2
Vinyl
Wood
Alum.
Clad
Alum.