Whether you're looking for new units to outfit an addition or replacements for your existing windows, the experts at This Old House sort through the options to simplify your search
Double-hungs are identified by the number of panes, or "lights," in each sash. A 6-over-6, for example, has six panes per sash. The double-hung shown here is an 8-over-12. It's called a "cottage window" because its upper sash is smaller than its bottom one.
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