The District mixes rowhouses and newer buildings. Summers are hot and humid, and winters are cold.
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Service types
Window replacement
New units in existing openings, including insert replacements and full-frame replacements.
Energy-efficient windows
How U-factor, solar heat gain, and air leakage are labeled, without a promised bill change.
Window installation
Flashing, shimming, insulation of the gap, and how the opening sheds water.
Window repair
Hardware, balances, sashes, and fogged insulated-glass units.