Florida Product Approval FL #15476
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Increasing amounts of Destruction
In recent years, the economic consequence of structural damage due to
hurricanes has become increasingly evident. This increase in damage can
be directly attributed to two factors: increased demand for housing
along coastal areas, and the number of inferior strength homes being
impacted by these hurricanes. Even the new building codes are only
designed to withstand pressures associated with a category 3 hurricane.
The weakest parts of wood construction are the connections holding the
wood together. When a roof is built the plywood sheathing is nailed to
the rafters creating the structure of the roof. These nails provide the
only connections holding the roof together. During a hurricane the winds
produce large amounts of suction pulling upwards on the roof. This
pressure pulls up on the sheathing prying the nails back out of the
rafters. Even if the roof doesn’t fail, each passing hurricane weakens
the connections holding the roof together, which increases the chances
of failure during future storms. The most efficient way to strengthen
the weakest part of a buildings structure is
Foam Seal SF2100
Adhesives in roof protection
The structure of a roof is held together by a series of nails connecting
the trusses to the sheathing. The continuity of this connection is
limited by the spacing of the nail. The most current building codes have
increased the frequency of nail connections but there strength is still
limited. Adhesives work well in this application since they can be
applied in a continuous bead along the length of the rafter, enabling
the load to be transferred evenly along the entire length of the roof.
Foam Seal SF2100 product is applied to the truss and sheathing
its uplift resistance is increased up to 5 times stronger then nails
A roof built to the strongest building codes in
the country will withstand uplift pressures of 750 pounds to separate
the sheathing from the trusses. These uplift pressures are associated
with a medium strength hurricane, so the chances of roof failure go up
considerably in higher strength storms. Testing shows if the envelop of the
building is breached pressures will instantly double increasing the
uplift pressures trying to pull the roof off. In our uplift video the
same roof with
Foam Seal SF2100 will test over 3,000 pounds of pressure
to separate the structure of the roof.
Foam Seal is sprayed on as a liquid quickly hardens into a water tight
seal. This reduces water intrusion by 99% even if the roof covering is
Foam Seal Hurricane Adhesive is a PATENTED moisture sealing
foamed polyurethane sheathing adhesive.
The sheathing of built to code roofs are connected by brackets that
create a separation of 1/8” to 1/4” between every piece of sheathing. A
4,000 square foot building can have approximately 200 sheets of
sheathing. If you add up the open spaces between all of the sheathing
there will be over 33 square feet that is completely left open. That is
the equivalent of 1.5 sheets of plywood missing.
If the roof covering is blown off
the roof or even slightly damaged there is nothing to stop the water
from pouring into the house.
Roof coverings (shingles or tile) are usually the first thing to start
failing in a high wind event. The closed-cell
Foam Seal product will
create a water tight barrier between all of the pieces of sheathing.
This will keep the water from entering the attic through the gaps,
eliminating the possibility for dangerous and costly mold spores to grow
Foam Seal hurricane Adhesive is your last line of defense when the roof
covering is damaged during a hurricane.