Two operating vertical sashes

Double-hung windows

Double-hung windows use two vertically moving sashes so ventilation can be adjusted at the upper section, lower section or both.

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White double-hung replacement window with two sliding sashes

A representative replacement window configuration. The exact product, options and performance details are confirmed in your written quotation.

01The familiar horizontal meeting rail gives a traditional proportion while adding more operating flexibility than a single-hung layout.02Each sash travels within its own portion of the frame and relies on balances, locks and weather seals specific to the window system.03Meeting rails interrupt the view, moving interfaces need adjustment and cleaning features vary; egress still depends on exact clear-opening dimensions.

At a glance

What homeowners should know about double-hung windows.

Double-hung windows use two vertically moving sashes so ventilation can be adjusted at the upper section, lower section or both. The familiar horizontal meeting rail gives a traditional proportion while adding more operating flexibility than a single-hung layout. Each sash travels within its own portion of the frame and relies on balances, locks and weather seals specific to the window system.

Bedrooms, living areas and traditional facades may benefit where vertical operation avoids projecting into an exterior walkway. Selection begins with the room, opening geometry and access rather than a style name alone. The measured quotation should identify operation, overall size, glass, finish, hardware and installation scope together.

Operation and use

How double-hung windows work.

Each sash travels within its own portion of the frame and relies on balances, locks and weather seals specific to the window system. Bedrooms, living areas and traditional facades may benefit where vertical operation avoids projecting into an exterior walkway.

Meeting rails interrupt the view, moving interfaces need adjustment and cleaning features vary; egress still depends on exact clear-opening dimensions. Hardware reach, screen position, moving clearances and the relationship to nearby furniture or exterior paths should be checked before sizing is finalized.

Two moving sashes

Upper and lower ventilation can be adjusted independently when both sections operate.

No projection

Vertical travel keeps the sash within the plane of the wall.

Tilt features

Where supported, inward tilting can simplify cleaning; hardware and restrictions remain model-specific.

Air sealing

Compare tested values for the exact unit rather than assuming performance from style.

Room and opening fit

Where double-hung windows work well.

Bedrooms, living areas and traditional facades may benefit where vertical operation avoids projecting into an exterior walkway. The useful answer depends on sill height, reachable hardware, desired ventilation, view, privacy and the amount of wall available around the unit.

Meeting rails interrupt the view, moving interfaces need adjustment and cleaning features vary; egress still depends on exact clear-opening dimensions. Building-code requirements, including egress where applicable, depend on the final clear opening, hardware and local project conditions; a style label alone does not establish compliance.

Glass, frame and finish

Choose double-hung windows glass, frame and finish together.

Review equal or unequal sash proportions, tilt-in features, screen coverage, grille patterns, glass packages, locks, colour and mullion combinations. Pane count by itself does not establish whole-window performance, so the exact glass package and documented values should be compared for the quoted size and operation.

Align meeting rails and grilles across the elevation, then coordinate casing, sill treatment and exterior trim. Colour, grille pattern, screen, hardware and adjoining fixed or operating units should be coordinated from both the interior and exterior elevations.

Sash proportions

Set the meeting rail around sightlines and neighbouring windows.

Balances and locks

Evaluate operating effort, locking points and long-term adjustment access.

Screen coverage

Confirm full or partial screen layout and removal direction.

Glass and finish

Compare coatings, pane count, grilles, colour and trim together.

Replacement scope

Plan double-hung windows installation around the existing opening.

Measure the retained opening carefully because an insert can reduce visible glass and clear opening; full-frame work may better address deteriorated frames or finish changes. A retrofit approach may be reasonable only when the retained frame is sound, correctly shaped and suitable for the new unit. Full-frame work exposes more of the perimeter and can address frame condition, opening size and finishes more completely.

Align meeting rails and grilles across the elevation, then coordinate casing, sill treatment and exterior trim. The written scope should state removal limits, perimeter insulation, interior air sealing, exterior water management, trim or capping, disposal, adjustment and final finishing.

01
Assess and measure
Confirm the double-hung windows opening dimensions, frame condition, access, clearances and intended operation before selecting the final configuration.
02
Specify the assembly
Record the double-hung windows frame, glass, hardware, screen, finish, mullions and adjoining units so the components are compatible.
03
Define the finish
Identify the double-hung windows removal, sealing, water-management and interior/exterior finish work rather than leaving the perimeter ambiguous.

Technical and configuration details

Double-hung windows: construction and configuration details.

Each visual explains a specific detail relevant to double-hung windows. Captions identify its practical limits.

Representative shared frame-profile evidence for hung and sliding sash construction.

Product examples

Product configurations related to double-hung windows.

Explore common configurations, then confirm the exact product, performance ratings and warranty in your written quotation.

White single-hung replacement window with one sliding sash

Replacement windowReference WRP-W005

Single-Hung Window

A vertical-sliding window with one operating sash and one fixed section. It provides familiar proportions without projecting into exterior space, making it useful beside paths, porches and planting.

Operation: Single hung
Frame material: Vinyl / uPVC
Frame depth: Approximately 3 1/4 in

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Large white fixed picture replacement window

Replacement windowReference WRP-W008

Picture Window

A non-operating window intended to provide uninterrupted daylight and views without ventilation hardware. The fixed sash can stand alone or be coordinated with casement, hung or slider units in a larger composition.

Operation: Fixed / non-operating
Frame material: Vinyl / uPVC
Glazing: Double- or triple-pane insulated glass options

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Plan your replacement

Start with the opening you need to replace.

Compare suitable options, confirm the site measure and receive a written scope for product supply, installation and finishing.

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