All extruded vinyl profiles are not alike. When first fabricated, all new windows perform adequately. It is how these windows stand up to years of use that separates the good from the bad. Rosati Windows uses vinyl that is born from nearly four decades of European technology and is used worldwide. Our extrusion has a beveled exterior for a stylish look and narrow rails for a great view. We use the finest vinyl material in the sash and master frame, which makes the window more durable and impact resistant. Also, the metal reinforced sashes provide added strength and stability. Our master frame and sash frames are fusion welded for durability and for superior resistance to air and water infiltration. The miters are machine tooled for a clean finish.