WHY BUY FROM CASTLE The Window People? Castles exclusive Life of the Home warranty -- all covered repairs are done at no cost for the life of the home. 100% Virgin Vinyl State of the art warm edge spacer system Styrofoam fill in main frame and sashes Double-strength optical glass Soft low coat E glass on both inside panes Argon gas filled High security double-action cam sash locks Full rail-to-rail interlocking system Reinforced locking stainless steel meeting rails Double vent locks Full perimeter fiberglass insulation wrap Expander cap installation system Memory screens UV filtered aluminum exterior trim package Fully insured Labor and materials professionally installed Factory trained installers Always a complete clean up All job debris hauled away Castle The Window People brings you ENERGY STARENERGY STAR qualified products use less energy than conventional products. And money isn't all you're saving by purchasing products that use less energy - you're also helping to save the environment. As an ENERGY STAR partner, Castle The Window People is proud to offer you products with the ENERGY STAR label. For more information, visit http://www.energystar.gov.