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BOCA The Building Officials and Code Administrators (BOCA) is a governmental department, that oversees building regulations and ensures that standards and building codes are met.
Bottom Rail A bottom rail forms the lowest cross piece of a window. Different window styles have different bottom rails, but most slope down and away from the frame to prevent the ingress of water.
Bow Window A bow window comprises several smaller windows built in the shape of a curve.
Brick Molding Brick molding is usually timber that is used to fill the gap between the frame and the brickwork of a door or window.
BTU British Thermal Unit (BTU) is a unit that measures energy. It is the amount of energy required to raise one pound of water by one degree Fahrenheit. It is used to describe the energy efficiency of a building.
Capping Capping is a method of covering original window materials with a second weather proof layer to protect the frame from extremes of temperature, wind, and dampness. It is also known as cladding.
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