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Structure

Structure™ is the first premium siding permanently bonded with Styrofoam brand extruded polypropylene (XPP) foam from Dow, a recognized leader in insulation. In addition to delivering superior strength, style and performance, the insulated siding line offers noise reduction, water resistance and energy savings.
  • Available in four styles:
    • Double 4", Double 4.5" Dutchlap, Double 6", and Single 7"
  • Looks and feels like solid wood - Dow premium foam is stronger and 30% more impact resistant than standard foam
  • Easy to install - Lightweight, flexible, easy to handle and cut with virtually no debris
  • Energy efficient - Improves R-value by 25%. Reduces energy costs
  • Superior Performance - Retains 97% of its R-value over time. Withstands 160 mph wind load
  • Won't promote mold and mildew - Retains less water than other products
  • Quiet comfort every day - Filters sound better than other products
  • Maintenance free - Unlike fiber cement, requires no caulking, patching, priming or painting
  • Created by two industry leaders - Alcoa Home Exteriors and Dow Building Products
  • Backed by Alcoa's Registered Medallion Lifetime-Limited Warranty