Specification

How Tyvek® and Insulation
Work Together
The average wall has 3-1/2 inches of insulation
which, under ideal conditions, has an installed R-
value of R-14. (Installed R-value includes the whole
wall system, with studs, sheathing board, insulation
and siding, and takes wind movement into
account.) Tests have shown that, when outside air
moves into the wall through any tiny crack or
crevice resulting from normal construction
practices, the insulation can lose up to 63% of its
installed R-value. Tyvek
®
HomeWrap
®
stops extra air
from flowing into a wall.
Controlling the air coming into your walls is more
important than adding more insulation to give you
the performance and comfort you expect. Be sure to
get the best insulating effectiveness and energy
efficiency in your home.
INSTALLED R-VALUE AT 9 MPH WIND PRESSURE
WITH AND WITHOUT TYVEK
®
K05038 ©2004 by E.I. du Pont de Nemours and Company, Inc., all rights reserved.
Tyvek
®
, HomeWrap
®
, the DuPont Oval, CommercialWrap
®
, The miracles of science
™
and DuPont
™
are registered trademarks or trademarks of E.I. du Pont de Nemours and Company, Inc.
For more information please
call 1-800-44-TYVEK
www.tyvek.com
100
90
80
70
60
50
40
30
20
10
0
R-13
94%
R-5
37%
Wall R-Value at
0 wind pressure
With Tyvek
®
at 9 mph
Without Tyvek
®
at 9 mph
Insulated Wall with Insulated Sheathing
R-14
100%
As shown in the chart, a home wrapped in
DuPont
™
Tyvek
®
will maintain 94% of its
installed R-value, compared to only 37%
for a home without Tyvek
®
.
Ask your builder or remodeler to install
Tyvek
®
HomeWrap
®
from DuPont.
It’s a choice you can comfortably live
with for years to come.
K05038.qxp 8/23/08 2:50 PM Page 2