"We used Suburban Construction for new windows in our house and we're glad we did. They are energy efficient, and make our house much warmer. The company is very professional. I would recommend Suburb... » more
- Jeff Louck of Davenport, Iowa


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Block and Tackle Balance System

The block and tackle system utilizes a high-density nylon cord pulley action which is attached to a moveable block that travels up and down within a metal chamber. Tension from a heavy duty coil spring at the top of the block creates the proper resistance necessary for smooth operation of the window sash.

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