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Window Types Explained
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Compare the main window styles, opening methods, frame choices and performance factors so you can specify windows that suit your home’s design and practical needs.
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Window types influence a home’s appearance, daylight, ventilation, security and energy efficiency. This guide explains casement, fixed, tilt-and-turn, sliding sash, bay, bow, roof and feature windows, together with common frame and glazing options.
It also covers solar gain, safety glazing, overheating, security and the installation details needed for a weathertight result. Our guide to window U-values explores thermal performance in more detail. For the underlying energy-efficiency requirements, see Approved Document L.
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