STYROFOAM SIS
The Dow Chemical Company
200 Larkin
Midland MI 48674
800.232.2436
 
 
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Calculate the Difference

It's one thing to say STYROFOAM SIS™ Brand Structural Insulated Sheathing contributes to energy-efficient and structurally sound homes. It's a whole other thing to see it all add up right before your eyes.

We encourage you to calculate potential energy savings and wall bracing amount with STYROFOAM SIS™ Brand Structural Insulated Sheathing with our easy-to-use calculators.

Ready to make a difference without a big change? We're braced for your questions.

 

 

Structured to Make a Difference 

Structural strength, insulation and water-resistive barrier. Achieve all three and save one trip around the house thanks to STYROFOAM SIS™ Brand Structural Insulated Sheathing, the revolutionary three-in-one building material that offers:

  • High R-value (R-3.0 at 0.5"; R-5.5 at 1"), helping meet high energy efficiency standards
  • Code-compliant structural bracing, continuous insulation and water-resistive barrier for improved thermal and moisture performance of the wall
  • Reduced energy consumption, which in turn reduces greenhouse gas emissions
  • Resistance to moisture intrusion and air infiltration
  • Reduced installation time, labor and material; eliminates the need for wood structural panels and housewrap, metal T-bracing or wood let-in bracing

Ready to make a difference without a big change? We're braced for your questions.

Video Library

STYROFOAM™ Inventor McIntire Named to National Inventors Hall of Fame
Former Dow research chemist Ottis Ray McIntire, inventor of STYROFOAM™, is among 18 new members of the National Inventors Hall of Fame. Patented in 1944, STYROFOAM™ still proves indispensable today.
Ray McIntyre, Inventor of STYROFOAM Brand Insulation
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Commitment to the Future
From simple everyday efforts to major investments in new technology, working toward a cleaner, greener planet is one of Dow's top priorities. Click the links below to learn how.
Structural Insulated Sheathing (SIS) Overview
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Structural Insulated Sheathing (SIS™) Overview
Introducing All new STYROFOAM SIS™ Brand Structural Insulated Sheathing a three-in-one solution that combines structural shear bracing, insulation and water-resistive barrier protection in one convenient product. 
Structural Insulated Sheathing (SIS) Overview
Overview
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Overview
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Structural Insulated Sheathing (SIS™) Installation
Installing STYROFOAM SIS™ Brand Structural Insulated Sheathing is quick and easy.
Structural Insulated Sheathing (SIS) Installation
Installation
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Installation
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Dow Insulation Solutions Featured on Weekend Makeover
Dow Building Solutions is doing its part to help preserve the environment, providing insulation and air sealants that help reduce greenhouse gas emissions, manage the consumption of natural fuel sources and more.

Dow Insulation Solutions Featured on Weekend Makeover
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BLUE™ The Essential Element for Building Solutions

BLUE™ The Essential Element for Building Solutions
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Conserve Energy. Reduce Energy Costs. Energized by Dow.

Energy costs continue to escalate at an alarming rate.
Between the high cost of heating and cooling our homes and fueling our cars, the oil crisis is hitting America where it hurts – our wallets.
Dow's trusted and proven solutions are designed to reduce energy loss and air infiltration, resulting in lower energy bills year after year.

Conserve Energy. Reduce Energy Costs. Energized by Dow.
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