48" Wide Single Hung Window - Thermal Break Aluminum (Multiple Heights) 10x20 Glazing Options: Choose from double

Glazing Options: Choose from double pane tempered glass

Thermal Break Technology: Reduces energy loss and improves insulation

Performance Ratings

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48" Wide Single Hung Window - Thermal Break Aluminum (Multiple Heights) 10x20 Glazing Options: Choose from double48" wide thermal break aluminum single hung window. The bottom sash operates vertically against a fixed upper lite. 100% aluminum no wood core, no vinyl with 6mm glass standard at no upcharge. Thermal break aluminum frame 6mm glass standard Free nationwide shipping 15 year warranty Available 36" to 72" tall. Select your height below.