SASH TYPE: UPPER FIXEDSASH TYPE: LOWER OPERABLESLIDE PATHWindow Type Guide

Double Hung Window Glass Repair

Double hung windows feature two operable sashes that slide vertically, allowing both the top and bottom to open for ventilation. They are the most common window type in American homes and are found extensively throughout the DMV area in both historic and modern construction. Double hung windows are versatile, easy to clean, and compatible with virtually any architectural style from colonial row houses to contemporary homes.

How It Works

Double Hung Window Operation

Double hung windows operate with two sashes that move independently in vertical tracks. Modern double hung windows use spring-loaded balances or block-and-tackle mechanisms instead of the traditional counterweight system found in older homes. Each sash can be opened to any position, and many newer models feature tilt-in functionality where the sash pivots inward for easy glass cleaning from inside your home.

Benefits

Both top and bottom sashes open for superior airflow control
Tilt-in sashes on modern models for easy interior cleaning
Compatible with any architectural style from historic to modern
Excellent child safety when only the top sash is opened
Wide availability of parts and replacement glass
Energy-efficient options available with weatherstripping upgrades

Common Problems

Issues We Fix

Broken glass in upper or lower sash from impact or thermal stress
Failed insulated glass units causing fog between panes
Broken or worn balance mechanisms causing sashes to drop
Deteriorated weatherstripping allowing drafts and water infiltration
Painted-shut sashes that will not open or close properly
Rotted wood frames on older homes allowing moisture damage

Repair & Replacement Options

Virginia Glass Windows offers comprehensive double hung window repair. We replace cracked or broken glass in either sash, swap out failed insulated glass units, install new balance mechanisms, replace weatherstripping, and free painted-shut windows. For wood-frame double hung windows, we can repair minor rot with epoxy consolidants or replace individual components. Our goal is always to repair and preserve your existing windows when possible, saving you the cost of full replacement.

Double hung window repair in the DMV area, the DC metro is our bread and butter at Virginia Glass Windows. As the most common window type in American homes, double hung windows make up the majority of our service calls across the DMV area. Cracked pane in a colonial-era row house or failed IGU in a modern double hung — our technicians bring the expertise and materials to complete the repair efficiently. We service all brands and vintages of double hung windows throughout the DMV area.

Many the DMV area homeowners struggle with double hung window problems that go beyond broken glass. Sashes that will not stay open, windows painted shut from years of repainting, and drafty gaps from worn weatherstripping are all common complaints. Virginia Glass Windows addresses all of these issues with targeted repairs that restore full window function. We replace balance mechanisms, free stuck sashes without damaging the frame, install new weatherstripping, and replace glass with upgraded insulated or Low-E options for improved energy efficiency.

For the DMV area homes with original wood double hung windows, preservation is often more desirable and cost-effective than replacement. Our skilled technicians can repair minor wood rot, reglaze glass panes, rebuild sash cords and pulleys, and install new weatherstripping to bring vintage windows back to excellent working condition. This approach maintains the architectural character of your the DMV area home while dramatically improving comfort and energy performance. Contact Virginia Glass Windows today for a free assessment of your double hung windows.

Common Questions

Double Hung Window FAQs

Double hung window glass replacement costs in Washington DC vary based on glass size, type (single, double, or tempered), and accessibility. Virginia Glass Windows provides free, no-obligation estimates for all Washington DC properties. We replace the glass only, which is significantly more affordable than replacing the entire window unit.

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