Optimum Energy Performance

Maximize your home’s thermal performance with Grandura Premium Insulated vinyl siding. Featuring a layer of insulation designed to lower your heating and cooling costs, Grandura’s superior energy efficiency combines with the elegance of natural wood and the maintenance-free benefits of vinyl to bring you a siding that looks and performs its best season after season.

Grandura is specially designed to provide optimum energy efficiency:

• Superior insulating properties that optimize energy performance
• Can boost R-value by 10-16% compared to traditional vinyl siding
• Reduces energy consumption over a home’s lifetime and reduces its
  overall carbon footprint
• Progressive polystyrene insulation is an ENERGY STAR qualified insulation
  product as part of the Home Sealing effort.