Buying Guide

The amount of insulation you should add depends
on a number of factors, such as:
• Where you live
• Your home’s age
• The condition of your existing insulation
To determine the R-value you need, subtract the R-value
you currently have from the R-value you want to achieve.
Learn more about determining how much insulation you’ll
need by visiting the Insulation Institute website.
READY TO INSULATE?
HERE’S WHAT TO DO NEXT.
Now that you know the basics of R-value, it’s time to estimate how many
packages of insulation you’ll need to purchase to reach recommended
insulation levels. Whether you use roll, batt or loose-ll insulation, the
packaging will list the R-value of each product.
Check out our other how-to videos and guides. You also can discover
DIY tips for Knauf EcoBatt
®
or EcoRoll
®
berglass insulation. If you
have any insulation questions, please contact Knauf Insulation or a
professional installer.
2. FIND YOUR EXISTING R-VALUE
There are simple ways to determine the R-value of your existing insulation:
3. DETERMINE HOW MUCH MORE INSULATION YOU’LL NEED
Look for an installation card or
insulation certicate in the attic or
electrical panel. A previous owner
or contractor might have left behind
information about the R-value of
insulation installed.
Check to see if existing insulation
has a paper facing. If it does, the
R-value will be printed on the paper.
If it does not, the R-value will be
printed on the berglass itself.
In exposed spaces such as the attic
or basement, you can measure the
thickness of the existing insulation
in inches. Then multiply that
number by three to estimate the
approximate R-value.