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Providing SIPs for California (CA), Oregon (OR) and Washington (WA)

Copyright © 2009 Western SIPs

Call for a Free Quote 1-916-276-4136

Building with SIPs creates a superior building envelope with high thermal resistance and minimal air infiltration.


  1. Oak Ridge National Laboratory (ORNL) Whole-wall R-value studies show that a 4-inch SIP wall (nominal) rated at R-14 outperforms a 2x6 stick framed wall with R-19 fiberglass insulation.


  1. ORNL blower door tests reveal that a SIP test room is 15 times more airtight than its stick framed counterpart with fiberglass insulation.


  1. Up to 40% of a home’s heat loss is due to air leakage.

A Structural Insulated Panel home allows for better control over indoor air quality because the airtight building envelope limits incoming air to controlled ventilation. Controlled ventilation filters out contaminants and allergens, and also allows for incoming air to be dehumidified, reducing the possibility for mold growth.

  1. SIPs do not contain any VOCs or other harmful chemicals that can affect occupant health. The components used to make SIPs (foam, OSB, and adhesive) meet some of the most stringent standards for indoor air quality.

  2. EPS uses pentane, a non-CFC blowing agent that dissipates shortly after production and EPS has no off-gassing.

  3. The adhesives used in SIP production do not contain any measurable amounts of VOCs that can be harmful to occupants.

  4. The oriented strand board (OSB) used in SIPs has often been inaccurately associated with the formaldehyde emissions that occur in fiber board and other composite products using urea-formaldehyde adhesives. The phenolic formaldehyde adhesives used in OSB have only trace amounts of formaldehyde in the finished product that do not jeopardize a home’s indoor environment or pose any health risks.

  5. Tests of OSB panels fresh from production revealed formaldehyde off-gassing of less than 0.1 parts per million (ppm), declining near zero as the panels age. To put this in perspective, there is more formaldehyde naturally occurring in many foods, such as apples and onions, or the human blood (3 ppm), than in a home built with SIPs.

SIPs Indoor Air Quality