Don’t sacrifice strength at these critical barriers to your home. Signature windows use the most technologically advanced materials for maximized strength against harsh weather, intrusion, and health hazards.

Strength and Security Features

EnviroTherm
injection foam filled for additional insulation and strength

Multi-chamber uPVC sash and frame extrusions create added insulation

Heavy duty sash stops and vent latches for added beauty and safety while still allowing ventilation
Fusion welded master frame and sashes provide maximum strength at all corners and seal chambers adding to Signature’s insulation value
True sloped sill (not the snap-in type) eliminates weep holes that can clog

Full interlock at the meeting rail provides added strength, security, and performance

Endurex composite, non-metallic reinforcement at the meeting rails adds strength, limits conduction and convection, and maximizes energy efficiency

Locking balance shoe allows the sash to tilt while remaining secure in the frame
MicroShield antimicrobial triple weather stripping and bulb seals provide maximum efficiency and resistance to air and water infiltration, mold, dust, fungi, pollen, and harmful bacteria