Pella® Impervia® Double-Hung Window

Get windows and doors ready to handle virtually anything life throws at them. Pella Impervia double-hung windows are made from our proprietary fiberglass, the strongest material available for windows and patio doors, engineered for lasting durability. Equal sightlines provide a clean, consistent aesthetic and a sloped sill design gives the look of a more-traditional double-hung. With our durable powder-coat finish, these double-hung windows will look great for years — inside and out.