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Polyurethane
foam is a
rigid,
cellular,
lightweight
plastic
material
with an
exceptionally
high
insulation
value
compared to
other
materials.
For example,
it has an R
value of 6.5
per inch of
thickness,
which is
more than
twice the R
value of
fiberboard.
Material
|
K
Factor
|
R
Factor
|
Thickness
for
Equivalent
Insulating
Value
|
Seamless
Polyurethane
|
0.15
|
6.50
|
25 mm
|
Glass
Fiber
|
0.25
|
4.00
|
40 mm
|
Exp.
Polystyrene
Bead Bd.
|
0.28
|
3.57
|
50 mm
|
Fiberboard
|
0.36
|
2.77
|
65 mm
|
Sprayed
polyurethane
foam roof
systems have
the ability
to
substantially
reduce both
heating and
cooling
requirements.
In many
installations,
the savings
in energy
costs have
paid back
the cost of
the roof
system in 2
to 6 years.
A
polyurethane
insulated
roof 1"
thick weighs
about 25
lbs. per
hundred
square feet,
compared to
competitive
roof
systems,
which can
weigh over
300 lbs. per
hundred
square feet.
Because of
the minimal
weight SPF
roof systems
add, the
system is
excellent
for new
long-span
roofs.
Lightweight
SPF is also
the perfect
solution for
existing
buildings
because they
can be
recovered
with little
or no
tear-off of
the original
roof. This
can save
considerable
time, labor
and disposal
costs.
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Unlike a
built-up
roof, which
becomes dry
and brittle
over time,
causing
cracks to
form and
leaks to
occur, a
polyurethane
foam roof is
highly
sustainable
for the long
haul. The
technology
has a
documented
history of
installations
still
holding up
well in all
types of
weather
conditions
after more
than 25
years, with
only simple
recoating
and
maintenance.
SPF roof
systems are
very simple
to maintain.
If there is
penetration,
the
closed-cell
structure of
the foam
keeps water
from
migrating,
so the
problem is
easy to spot
and fix. For
example, on
a silicone
coated SPF
roof, all
that's
required to
restore 100%
system
performance
is a
caulking gun
and silicone
sealant.
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