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Roofing
Application
Polyurethane for roofing is
sprayed onto the roof as a liquid, it forms a single continuous structure that
is seamless and very stable. SPF requires a clean surface for proper
application. It must be dry, free of contaminants like oil, and properly
fastened to the substrate in accordance with the proper building codes. A
protective elastomeric top coat is required which is typically sprayed on as
well, but it is also possible to be applied with hand or power rollers.
Foam roofing has many
advantages over traditional roofing methods for example:
- Seamless
Polyurethane foam is applied as a liquid, creating a single monolithic
membrane that covers the entire roof. There are no seams or joints, the source
of the majority of leaks in traditional roofs.
- Flexible
The
foam can be sprayed onto virtually any surface, irregularly shaped roofs and
protrusions are readily taken care of.
- Lightweight
Foam roofing typically weighs around 50 lbs. per square, versus 800 lbs. for a
built-up roof and 100 lbs. for ballasted single-ply roofs.
- Thermal Insulation
SPF has the best insulating properties available for commercial construction
today.
- Sustainability
Foamed roofs require a minimum of upkeep, creating little waste and have an
indefinite lifespan.
Installation
The "A" and "B" components of SPF are mixed at the spray gun, and are applied in
what are known as "passes". A pass is a single application of foam and can vary
in thickness from 1/2 inch to 1 inch or so. Therefore, SPF roofs that are
several inches thick are applied in multiple passes.
Durability
When most people hear of a "foam" roof, they automatically think of the type of
soft foam similar to that used for seat cushions and are concerned that they
won't be able to walk on it without causing problems or damaging the roof. Foam
roofs are very durable and can handle foot and construction traffic as well as
other roofs. They are still susceptible to damage from dropped tools just as any
other roof but can often be repaired with some simple polyurethane caulking.
Commercial
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