What are SIPS?
A Structural Insulated Panel (SIP or
SIPS) is a monolithic structural system which
provides superior insulation and structural
performance in exterior walls, roofs, ceilings, and
floors. Engineered wood facings (OSB) and solid
ridged structural insulation (EPS) are welded
together with a structural adhesive creating a
composite with exceptional strength. The R-Control®
SIP by SIPS Texas is used in both residential and
SIPs by SIPS Texas create tight,
super-insulated, stable structures which resist
fire, wind, insects (Timbor®), and decay (FrameGuard®).
Properly installed SIPs provide a lifetime of
security and comfort.
they work for me?
R-Control® SIPs hold national code
listings such as 2006 International Building Code®
(IBC) and the 2006 International Residential Code®
(IRC) along with others, including having been
evaluated and judged in compliance with the
requirements of the Texas Department of Insurance
Windstorm Resistant Construction Guide.
Development of “stressed-skin” panels
(SIPS) for buildings began in the 1930s. Engineering
and durability testing was conducted at the Forest
Products Laboratory (FPL) in Madison, Wisconsin, a
facility operated by the U.S. Forest Service.
FPL tested the concept of using skins to carry a
portion of structural loads by building a small
house in 1937. Wall studs in the panels were 3/4” x
2 ˝,” rather than the usual 2” x 4”. The structure
is still in use today and is a daycare center run by
the University of Wisconsin.
FPL scientists reasoned that if skins could take
part of the structural loads, maybe they could
eliminate framing entirely. The SIP engineering
theory was developed and tested, and a complete
structure was built in 1947 using corrugated
paperboard. This structure was heated, humidified,
and exposed to Wisconsin weather for 31 years.
The structure was disassembled periodically for
testing to observe changes in panel stiffness, and
bowing was minimal.
In 1969 foam cores were introduced to form the
modern structural insulated panel. This
implementation of ridged EPS cores gave SIPS the
stability and predictability need for developing a
standard for building code compliance.
SIP projects start with a quote. Most
clients provide us with a set of plans (typically
not developed for SIPS) from which we determine the
square footage of the areas requiring SIPS.
Structural load paths are also determined to ensure
adequate support. After the quote is accepted we
sign a contract with the owner/builder and develop
the shop drawings (see terms for definition). Shop
drawings are produced from the client’s plans,
enabling SIP production and installation. After the
client reviews and approves the shop drawings the
production process begins. The OSB and EPS are
laminated, and then placed under pressure to allow
for the adhesive to cure. After a quality check the
panels are then moved to the cutting are where the
panels are cut per the shop drawings, specific to
each individual project. The process continues
through to electrical chase boring, Frame Guard®
treatment and final quality control check.