Structural Insulated Panels 

SIPS offer our customers state-of-the-art energy efficient building systems using stress-skin panel technology. Panels are manufactured in a controlled environment in which two 7/16” Oriented Strand Board (OSB) skins are laminated to one pound density Expanded Polystyrene (EPS) cores using an industrial grade waterproof adhesive under controlled pressure to form a one-piece panel with the strength of a monolith.

Under testing, SIP panels are more than twice as strong as a comparable conventional (stick-frame) wall, and will not twist, rack or warp.

Our panels are environmentally safe, contain no CFCs, emit no toxins or known carcinogens, and are technically inert. Scrap materials created during the manufacturing process are up to 100% recyclable.

Due to the low-permeability and closed-cell nature of the EPS cores, and the waterproof nature of the adhesive; panels retain their high R-value for the life of the structure without the following common drawbacks of conventional structures using fibrous installation:

• Thermal short-circuits at each stud due to the low R-value of the wood
• Heat-robbing thermal siphoning due to the “breathing” of fibrous insulation
• Indoor drafts from voids in the insulation, openings around electrical outlets and mechanical chases, etc.
• Depreciation of the R-value due to the moisture content of the air within the
fibrous insulation

Standard panels are manufactured in five thicknesses:

• 4.5” (Two 7/16” OSB Skins) 3-5/8” EPS Core R-17
• 6.5” (Two 7/16” OSB Skins) 5-5/8” EPS Core R-25
• 8.25” (Two 7/16” OSB Skins) 7-3/8” EPS Core R-32
• 10.25" (Two 7/16" OSB Skins) 9-5/8" EPS Core R-43
• 12.25" (Two 7/16" OSB Skins) 11-5/8" EPS Core R-53.
• The 4.5” panel is typically used in commercial applications.
• The 6.5” panel is the standard residential wall and roof panel.
• The three largest sixe panels are used when a higher R-value,
and/or greater roof spans or loadings are required.


Our manufacturer manufactures its panels in 8’ x 24 one-piece units. These are then cut and machined to individual building requirements. The size of these panels helps to add efficiency for the builders by allowing the installation of very large areas (up to 192 square feet) of walls or roofs in one piece. Electrical chases are precut into all 4.5” and 6.5” wall panels at 16” and 44” from factory edges. Factory edges can be identified as those that have a colored coating on the edge of the OSB sheathing.