Core Construction:

• Multi-chambered design reduces exterior noise, adds insulation and strength and provides thermal efficiency.
• Multiple weather-stripping provides outstanding protection against the elements.Up to 5 weatherstrips help reduce heating and cooling costs.
• Screen channel designed for screen removal from inside your home.Half screen and full screen are available.
• Welded frame and sash corners provide strength and protection against air and water infiltration.
• Snap-in interior glazing bead allows easy replacement of glass from the inside.
• Double-walled sash design for superior strength.
• Excellent drainage system evacuates the heaviest rains.
• Provision to add windbreak to cut down on air infiltration.
• Extra thick wall design for improved rigidity.
• Interior groove allows the addition of mouldings such as 3/4" wood return, wood jambs or all u-PVC jamb extension.
• Provision for installation brackets.
• Tilt option available for easy cleaning
• New Ostaco "inLighten" screen is available.
  
  

Core Single Hung/Single Slider Performance Ratings

Series	Core	Core Plus
Air Infiltration Resistance	A3	A3
Water Infiltration Resistance	B4*	B3
Wind Load Resistance	C3	C4
Forced Entry Resistance	F2	F2

Core Series and Core Plus Series windows are Energy Star approved. Performance chart by USWADA.