Replacement Windows, Vinyl Padio Doors & Vinyl Siding    

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Balance System:  Device for holding vertically sliding sash in any desired position through the use of a spring, weight, or coil to counterbalance the weight of the sash in a particular position.

Bay Window:  An angled combination of three windows that project out from the wall of the home. The windows are commonly joined at 30- or 45-degree angles with a middle window parallel to the house.

Bead:  A wood strip against which a swinging sash closes, as in a casement window. A finishing trim at the sides and top of the window frame to hold the sash, as in a fixed sash or a double-hung window. Also referred to as a bead stop.

Beveled Exterior:  An angled extension from the window frame that adds an aesthetically-pleasing look to the exterior of the window.  Designed to mimic the look of a wood window. 

Blackbody:  The ideal, perfect emitter and absorber of thermal radiation. It emits radiant energy at each wavelength at the maximum rate possible as a consequence of its temperature, and absorbs all incident radiance.

BOCA: Building Officials and Code Administrators.

Bow Window:  Similar to a bay window, a bow window protrudes from a home’s at an angled combination consisting of windows in 3-, 4- or 5-lite configuration. The windows are attached at 10-degree angles to project a more circular, arced appearance.

Breathing Tube:  A small tube inserted in the spacer system of double or triple pane window panes when transporting newly manufactured windows up into a high altitude (3000 feet or higher) during shipping or between installation locations. They help move trapped, expanding air caused by the altitude lift that otherwise might pop or weaken the window seals. The tube is removed upon installation.

Brick molding:  A standard milled wood trim piece used to cover the gap between a window or door frame and masonry.

Btu (B.T.U.):  An abbreviation for British thermal unit--the heat required to increase the temperature of one pound of water one degree Fahrenheit.

Butyl:  A rubber material that seals the glass to the spacer, creating an airtight and watertight insulated glass unit. Butyl has the lowest gas permeability of all rubbers.