SIPs - Green Building Solutions

Structural Insulated Panels or SIPs are prefabricated building panels used to frame and insulate the walls, roof and floors of a structure. When using SIPs the framing and insulation are integrated all in one package. The result is a strong, highly insulating and airtight panelized form of construction. Learn why, when considering Structural Insulated Panels for your building project, RAY-CORE SIPs are the insulated panel of choice!

SIP Panel Breakdown RAYCORE


RAY-CORE is a completely different, far superior kind of structurally insulated panel! RAY-CORE’s unique patented wall panels and roof panels are not a sandwich panel SIP, relying on OSB and glue to provide the structure of your home. RAY-CORE structural insulated panels use century old tried and true framing practices and have added technology and high-tech materials to form a superior insulating panel with foamed-in-place studs, the highest R-value polyurethane foam and wrapped in a radiant vapor barrier.

    Why Should I Use RAY-CORE SIPs?

  • Exceptional Strength - Stronger than sandwich panel SIPS.
  • Superiorly Insulating - Maximum R-Value High Density Closed Cell Polyurethane Foam Insulation - R7 per inch!
  • Extremely Tight – Tight sealed joints keep the inside in and the outside out. Studs encapsulated in impermeable foam and vapor barrier prevents rot.
  • Product You Can Trust – Will not delaminate, no glues holding up the structure.
  • Availability - Easy ordering, no special plans required. Many panels available for shipping in days. Fast Shipping - The panels when you need them!
  • Panels to Meet Your Needs - Available in a variety of thicknesses, lengths, R-values and stud configurations.
  • AffordableLeast Expensive per R-value Inch on the Market! Simple per-square-foot pricing. No added costs for engineering or special installation. Affordable shipping.
  • Reduced Costs - No added engineering, shop drawings, special code approvals or special trained framers required.
  • Easy to Use - If you can build with sticks, you can build with RAY-CORE.
  • Fast – Reduced construction time, results in labor savings.
  • Extremely Lightweight – Easy for one man to handle, no cranes required. A 4' wide x 8' long R-42 panel weighs only 84 lbs!
  • Modular – No ups, downs, rights or lefts.
  • Adaptable – Changes aren’t a problem, easy onsite modifications.
  • Fire Safe - Class 1 fire rated, will not sustain a flame or melt like polystyrene.
  • Mold-free – Polyurethane foam is impermeable to moisture - No mold growth.
  • Environmentally friendly – Reduced jobsite waste.
  • “Green” – Energy Savings for a lifetime!
  • SIPs RAYCORE LIGHTWEIGHT Easy to Handle, Lightweight RAY-CORE SIPs.

    For More RAY-CORE SIPs vs. Sandwich Panels SIPs Comparison

    Learn More about how RAY-CORE Structural Insulated Panels compare to Sandwich Panel Structural Insulated Panels.

What Are Sandwich Panel SIPs?

The most common type of structural insulated panel is referred to as sandwich panels SIPs. Sometimes also referred to as stress skin or stressed skin panels, these panels generally consist of an insulating material, polystyrene foam, “sandwiched” between two outer “skins” of oriented strand board or OSB. The two materials are laminated together with an adhesive or glue to form a combination panel with the outer skin material providing the “structural” part of the insulated panels. Other variations of insulating and skin materials are occasionally available. To learn more about Sandwich Panel SIPs, visit:

Why NOT Use Sandwich Panel SIPs?

  • Not Strong Enough - Not as strong as RAY-CORE SIPs.
  • Less R-Value - EPS Styrofoam has an R-value of 3.6 - 4.2 per inch. XPS Styrofoam has an R-value of 5 per inch.
  • Airtight? – Depends on careful attention to installation techniques and if not performed correctly the insulation panels OSB will rot, and lose their structural integrity.
  • Can Trust It? – Delamination, glue failures, rot, wall creep and roof sag plague the product and industry.
  • Availability - Special plans and costly engineering require by the sandwich panel manufacture. Not produced until ordered and long production lead times.
  • Panels Might Meet Your Needs - Different thicknesses, lengths and R-values are availiable..
  • Very Expensive - 1-1/2 times the cost of RAY-CORE SIPs. Often initial pricing does not include all costs. Substantial added costs for engineering and installation. Costly shipping!
  • Added Costs - Engineering, shop drawings, special code approvals and special trained installers required.
  • Difficult to Use- Special training courses required with detailed installation requirements to build with.
  • Fast – Reduced construction time but costly installation costs
  • Heavy – 1 1/2 to 2X the weight of RAY-CORE Panels. A 4' wide by 8' long R-37 panel weighs 121 lbs. Less R-value, more weight. Cranes required and added shipping costs.
  • Fixed – Each piece has an number and a required location.
  • Unalterable – Onsite modifications difficult and will void engineering. Must wait for reengineering and replacement panels.
  • Not Fire Safe- Low melt rate (have you ever thrown a styrofoam cup in a fire?) Should a fire occur, your walls will melt away and your house collapse. Use of HBCD flame retardants are hazardous to both humans and the environment.
  • Mold Problems - EPS and XPS foams are Semi-permeable foams, allowing moisture to penetrate with potential mold growth.
  • Environmental – Precut panels during manufacturing reduces jobsite waste, but waste is waste. Cutouts must still be disposed of at the manufacturer. In addition, the effects of brominated flame retardants added to the foam to reduce flammability are bioaccumulative and potentially toxic having a negative environmental effect.
  • "Green" – Helps to save energy, but can they be considered "green" considering the costs?
  • Sandwich Panel SIPs Heavy Heavy and Awkward to Move Sandwich Panel SIPs.