Q.) Why do we use a polyurethane panel rather than polystyrene?Team | SIP Supply | April 9, 2012 | SIP FAQs | No Comments A.) Simply put, we feel that by delivering Polyurethane (PUR) as a polyurethane panel, we are delivering a better SIP product. Please read why we feel this way at Foam Core Comparison.Greenix Panels:Polyurethane Core We use top of the line , Class 1 (PUR) Polyurethane foam that doesn’t fuel a fire, compared to foam like EPS that meltsFactory Fabricated Greenix Panels are cut to the exact plan with in-factory quality controlElectrical Boxes and Chases Included All Electrical Boxes & Conduit are pre-installed at the factory, no job-site cutting necessary!Doors and Windows Pre-Cut All Door & Window openings are cut & framed in the factory, no ‘scooping’ necessary!Highest R-Values Compared to R-11 for 2×4 Stick Frame and R-14 for 4″ EPS SIP, our 4″ Greenix Panel comes in at an impressive R-24Lear more about the advantages of Polyurethane Panels Was this post informative?Signup today and receive free SIP updates straight in your inbox. We will never share or sell your email address. Powered by Optin Lock Tags:polyurethane panel, foam core, chases, top of the line, exact planRelated Posts Q.) Does the insulation lose R-value over time? No Comments | Apr 9, 2012 Q.) Is a Greenix Panel a “green building product?” Is it environmentally safe to make and use? No Comments | Apr 9, 2012 Sandwich Panels, are they SIPs? 4 Comments | Sep 20, 2012 Q.) How much are they? Do SIPs walls cost more than frame walls? 2 Comments | Apr 9, 2012About The Author Team | SIP SupplyAdd a Comment Cancel replyYou must be logged in to post a comment.