Construction
Window Sash Weight Calculator
Sash size and glass type give sash weight to match counterweights.
Sash weight (lb)
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- Per counterweight (lb)
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- Glass area (sq ft)
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- Wood frame est. (lb)
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FAQ
Single vs double-pane? +
Single-pane is around 2.5 lb/sf. Double-pane insulated is around 4 lb/sf.
Counterweights? +
Each sash typically has two counterweights, one per side, each carrying half the weight.