Window Glossary

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There are 8 names in this directory beginning with the letter B.
Backerboard
A flat material used on the face of the house, between the studs and the siding, to provide a nailable surface for the siding.

Balance covers
A snap in covering that conceals the EvenForce™ block and tackle balance system within the window frame, helping to keep dirt and dust out of the chamber.

Bay window
An angled combination of three windows that project out from the wall of the home. The windows are usually positioned at 30- or 45-degree angles.

Beveled MasterFrame
Some Alside windows feature a unique fusion-welded design that accommodates differing installation methods and architectural styles. It is the angled portion of the masterframe profile that adds a three dimensional appearance to the exterior of the window.

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.

Bow window
An angled combination of windows in 3-, 4- or 5-lite configurations. As the windows are joined to each other, they combine to form an arch shape that projects from the wall of the home.

Buttlock
The bottom edge of a siding or soffit panel, or accessory piece, opposite the nailing slots, which locks onto the preceding panel.

Butyl
A rubber material that seals the glass to the spacer, creating an airtight and water-tight insulated glass unit.