How can insulation make your roof perform better and last longer?
Breaking Down Roofing Insulation’s
Heat moves through a roof in three ways. Each
n Convection occurs within gases and liquids as a
has a different impact on building performance and
the options available to control it.
n Conduction occurs within solid materials and
between solid materials in physical contact. This
is perhaps the most intuitive path of heat transfer.
combined result of heat conduction within the gas
or liquid and the movement of these substances.
For insulation, that means air gaps, entrapped or
latent moisture (evident in all construction mate-
rials), and wind uplift/negative pressure.
n Radiation occurs independently of solids, gases
and liquids, such as when sunlight heats a roof
The Three Vital Roles
of Roofing Insulation
Roofing insulation doesn’t get much respect. Out of sight and out of mind describes the approach of many commercial building own- ers and facility managers. If the roof system
doesn’t have a hole (keep those fingers crossed), then
all is good. But roof insulation affects your building’s
performance and operations cost – not to mention its
service life – on a nearly daily basis.
As many as 90% of roofs on commercial buildings
consist of low-slope designs with rigid insulation
attached to a deck of steel or concrete. In these sys-
tems, the insulation can play three roles:
n Thermal barrier
n Working platform
Maximizing each role of the roofing insulation
increases your roof’s ROI.