Use and Care Manual
The increased performance of your insulation and
ductwork and decreased workload on your air conditioner
and other appliances mean Enerflex Radiant Barrier will
pay for itself in utility bill savings.
Multiple studies and tests have proven the merits of
installing a radiant barrier system. For more information
on radiant barriers and their use, please visit the
Web sites below:
U.S. Department of Energy: www.energy.gov
Oak Ridge National Laboratory: www.ornl.gov
Florida Solar Energy Center: www.fsec.ucf.edu
Installing Enerflex Radiant Barrier in certain applications
may qualify for state and local government tax credits.
Many energy companies also offer rebates to their customers
your area to take advantage of these savings.
system will depend upon the climate, the type and size of
your house, the amount of insulation already in your house,
and your fuel use patterns and family size. To get the best
performance, it is essential that Enerflex Radiant Barrier
be properly installed.
Reduce your utility bills.
Enerflex Radiant Barrier reduces heat transfer
by thermal radiation across the air space
between your roof and the attic floor, where
insulation is typically installed.
On a hot day, heat from the sun is absorbed by the roof
shingles and warms up the sheathing below, which radiates
heat toward the attic floor and conventional insulation.
All materials emit radiant heat to varying degrees based
on their surface temperature. By installing Enerflex Radiant
back toward the roof.
The result: The top surface of the insulation is cooler than
it would have been, which reduces the amount of heat that
moves through the insulation to the living areas below.
Enerflex Radiant Barrier comes in flat panels and rolls to
Enerflex Rolls
Stapled to rafters
Best for new construction
and covering the gable
end walls and other
vertical surfaces
Roll sizes available
Larger roll sizes available
at EnerflexFoil.com
Enerflex Panels
Install without tools
Best for adding a radiant
barrier to an existing home
Panel sizes available
rafter spacing
rafter spacing
With
Radiant Barrier
Without
Radiant Barrier
Up to
30°
cooler
Pitch
Roof Pitch
Factor
2:12 1.02
5:12 1.08
1.12
8:12 1.20
*Measure this distance.
*
table 1
Example
A)
including attached garage
(if applicable)
B) Roof pitch 5:12
C) Roof pitch factor from
table 1
1.08
D) A x C
=
E) Rafter spacing
F) D
÷
rafters
÷
8
=
G) D
÷
on-center rafters
H) Total needed
I) Cost each
J) Total
table 2
Measuring your roof’s pitch
Determine the amount of Enerflex Radiant
Barrier panels needed
Installation option 1:
Installing panels between the rafters
The amount of Enerflex Radiant Barrier needed is equal
to take the measurement. To estimate the roof area,
think of your home as a basic square or rectangle.
Installation option 2:
Stapling to underside of rafters
If you intend to staple the radiant barrier to the
underside of the roof rafters, you need to know the
roof area square footage, calculated as follows:
1. Multiply the length and width of the attic to
2. Based on the pitch of your roof, multiply the
footprint square footage by the appropriate
factor listed in table 1.
The resulting number is the roof area square footage.
square footage amount, keeping in mind that each
radiant barrier piece is to be overlapped by 1-2 inches.
Note: If you have a gambrel or hip roof, you will
need to measure each section separately using
this technique and add the amounts to get the
total roof area square footage. If you intend to
cover the gable ends as well (recommended),
don’t forget to include those in your calculations.
Note: Laying over attic floor
DO NOT lay Enerflex over the attic floor on top of
existing insulation.
This application is susceptible to dust accumulation,
which will cause loss of performance over time.
Need LEED?
points under EA 1 and MR 5.
Design, is an internationally recognized green
12
12
Increase the comfort of your home year-round
with Enerflex
™
Radiant Barrier.
*