Flexible, seamless, lightweight roofing system
that's truly leak-proof!
SPF is
a closed cell roofing material formed by the combination of
two liquid components. When these two materials meet in the
mixing gun they immediately expand 20-30 times their volume,
forming a rigid polyurethane foam (PUF). The roof is sprayed
to the desired thickness, (usually 1-2 inches) The entire roof
is sprayed to form a seamless monolithic surface including flashing,
penetrations and parapet walls. This process eliminates seams
and cold joints, the source of major leaks and thermal shorts.
The system provides a durable waterproof covering that bonds
tightly to nearly any properly prepared surface.
Sprayed Polyurethane Foam (SPF) has been used as a roofing and
insulation material for more than 30 years. During this time,
SPF systems have proven themselves through comprehensive, independent
studies to be dependable, long lasting, and very affordable.
Today there are foam roofs that have been in place for more
than 30 years, and by all appearances they should be able to
last indefinitely.
Sprayed Polyurethane Foam has an initial R-value of 7.14 per
inch thickness, enabling it to provide more thermal resistance
with less material than any other type of roofing insulation.
Sprayed Polyurethane Foam is lightweight – about 8 ounces per
square foot – and can be
applied over most existing roof surfaces without exceeding the
structural load capacity. Yet it’s amazingly strong, easily
withstanding foot traffic and other weight requirements. Since
it can be applied directly over asphalt, shingles, built up
roofs, clay, concrete, metal and wood there is rarely a need
for tear-off, reducing the amount of time, disruption to the
business and even reducing the debris in landfills.
Sprayed Polyurethane Foam has to be protected from exposure
to the sun’s ultra-violet radiation and moisture. This is where
the Pella Roofing & Insulation Elastromeric
coatings help protect and seal the foam from
any damage
