: Strong and durable, allowing for thinner frames and larger glass areas in modern designs. 0.5.31 Common Window Styles

: Known for being up to 8 times stronger than vinyl, preventing expansion and contraction for better long-term seals. 0.5.35

: Hinged windows that crank outward, providing a tight seal and excellent airflow. 0.5.9 , 0.5.25

: For maximum efficiency, look for low U-factors (insulating value) and a low Solar Heat Gain Coefficient (SHGC) to block heat in warmer climates. 0.5.5 , 0.5.24