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What
are SIPs (structural insulated panels)?
SIPs
are a component wall, roof and floor system comprised of foam core
insulation, sheathed on both sides to form a complete exterior
framing system of the highest energy efficiency.
How does the
cost of a SIP structure compare to a stick-built?
Depending
upon the cost of lumber and labor in your area, the finished cost
of most SIP structures will be comparable to stick framing.
Material cost is higher, but the framing labor cost should be
considerably lower. Also, the incredible energy savings of the
system will pay for the difference and continue to save the
homeowner for the life of the home.
Do carpenter ants and termites prefer foam core houses? No, ants
and termites will attack conventional and panel homes
indiscriminately. The foam provides no nutritional value.
Do SIP homes have moisture problems? SIP structures tend to be
very air tight compared to other building methods. Generally a
moisture barrier is applied to the exterior in predominately warm
climates and on the interior for cold climates, but always check
with your local code official for the recommended application in
your area. Also, an air exchanger is recommended.
What is the
fire rating of SIPs?
The
flame spread of EPS (expanded polystyrene) has a rating of 5 on
the UL scale of 0 – 100, with asbestos being 0 and red oak being
100. The combustion gases of EPS have been declared non-toxic in
accordance with the Federal Hazardous Substance Labeling Act.
Is the SIPs building system code approved and warranted? SIPs have
been approved by HUD, UL, and ICBO. Panels have been tested by
RADCO, an independent third party testing agency, for strength and
performance. NER certification is pending.
What type of
interior and exterior finishes can be used in conjunction with
SIPs?
SIP
walls are compatible with typical types of windows, doors, and
finishes. Exterior finishes include log, siding, stucco, stone,
etc. Interior wall finishes include dry wall, adobe, plaster and
wood.
What
does the term "R-Value" mean?
It
is essential to understand what exactly R-value is. There are
three methods of heat transfer: convection, conduction, and
radiation. R-value is the measure of resistance to heat loss by
conduction only. The most important factor in thermal efficiency
is the continuity of the insulation. The SIP system results in a
solid envelope of foam where even the studs have a foam core.
Therefore, that system has the ability to resist heat transfer by
conduction and convection (air movement).
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