Solid 100% pure vinyl windows engineered to last a lifetime. - Double strength Low-E glass, with Argon gas between the panes, providing the best insulation value (rf) in windows available. - Beautiful solid vinyl frames which never require paint, caulk or glazing removing any need to repair rotted or weather damaged wood frames. - All windows are custom made for the openings in your home. - Double hung windows tilt in for quick and easy cleaning (No more removing the old storm window to clean your windows.) - Several colors, wood grain styles and grid patterns are available to correspond with your décor. - Patio and Entry Doors are made with tempered glass units and easy operation hardware - Lifetime to Lifetime warranty protects your windows for your lifetime and even if you sell your hom