What is a Double Hung Window? A Homeowner's Guide

If you live in an older home or are looking to match a traditional architectural style, chances are you have double hung windows. With their iconic divided light patterns and dual sliding sashes, double hung windows complement classic home plans like Colonials, Victorians, and Cape Cods. But what exactly is a double hung window and how does it work?

In this homeowners guide, we'll explore everything you need to know about double hung windows from key terminology to energy-efficient models. You'll learn how double hung windows operate, why they suit various home aesthetics, and their benefits over other window varieties. We'll also cover typical costs to replace double hung windows and steps for upgrading yours while maintaining your home's traditional charm.

What is a Double Hung Window?

A double hung window contains two operable sashed that slide vertically in separate channels. This allows you to open and adjust both the top and bottom sashes, unlike single hung models where only the bottom sash moves. In a closed position, double hung and single hung windows appear identical making them easy to confuse.

Key identifying features that indicate you have true double hung windows are window locks on both the top and bottom sashes. You'll also see two sets of tilt release hardware that allow both sashes to tilt inwards making these windows easier to clean.

Difference from Single Hung Windows

Single hung windows only have one operable sash, typically the bottom sash slides up and down while the top sash remains fixed. This limits ventilation to just the lower half of the window. The bottom sash may tilt inwards for cleaning but the exterior of the top sash is difficult to access.

Double hung windows allow both sashes to move providing better temperature regulation, airflow and easier cleaning. With two operable sashes, you can opt to open just the top, just the bottom or both sashes simultaneously to control ventilation based on your needs.

How Does a Double Hung Window Work?

Double hung windows operate by sliding both sashes vertically in separate channels within the window frame. Each sash locks into place at various points along the channel allowing you to open and close each one independently.

Using the tilt release latches located at the top of the bottom sash and bottom of the top sash, both sashes can tilt inwards making cleaning the exterior glass convenient without needing a ladder. This tilt-in feature provides easy maintenance for hard to reach second story windows.

Double hung windows may consist of a single large pane of glass in each sash or have divided lite grids with multiple panes per sash. The number of glass panes does not impact operation but does affect the style and aesthetic.

By ventilating from both the top and bottom of the window rather than just the bottom like single hung models, double hung windows deliver superior temperature and humidity control. Adjusting one or both sashes allows great flexibility accommodating ventilation needs.

Double Hung Window Terminology

Some common parts and terms used with double hung windows include:

• Stiles - The vertical outer pieces forming the window sash edges
• Rails - The horizontal pieces at the sash top and bottom
• Muntins - The dividers between glass panes or lites
• Glazing - Glass or other transparent materials fitted into the sash
• Jambs - Vertical pieces forming the window frame
• Jambliners - Track inserts that allow smooth sash movement
• Balance Systems - Springs that counterbalance the sash weight when opening
• Sash Locks - Hardware that locks the sash in place when shut

Typical Architectural Applications

Double hung windows beautifully complement homes with traditional architectural styling. You'll frequently spot double hung windows gracing these popular home plans:

• Colonial : Symmetrical double hung windows match the balance of Colonial designs featuring simple styles with divided lite windows.
• Victorian : Decorative double hung windows suit Victorian architecture with ornate shapes, colors, and details.
• Cape Cod : Centered picture windows flanked by double hungs complete the clean-lined charm of Cape Cod homes.
• Cottage : Small, cozy cottage floorplans populated with modest double hung windows oozing cottage charm.

Their divided lite patterns and operation make double hung windows a favored choice for renovating homes needing new windows that maintain historical accuracy. For replacement projects, double hung windows continue traditional form and functionality.

Benefits of Double Hung Windows

Several beneficial perks come with double hung windows explaining their popularity stand the test of time:

• Easy Cleaning - Both sashes tilt-in making cleaning safe and convenient.
• Light & Airflow Control - Dual sashes deliver superior ventilation control.
• Architectural Authenticity - Models matching historical styles for replacement projects.
• Child Safety - Limits how far windows open preventing accidental falls.
• Energy Efficient - Well-sealed modern double hung windows prevent heat loss.
• Easy Operation - Sashes slide vertically avoiding cranking issues.

When properly maintained, double hung windows provide lasting serviceability. Their functionality and classic aesthetics make them a perennial favorite.

Double Hung vs. Casement Windows

Casement windows operate quite differently from double hung windows despite both being very popular choices. Rather than sliding vertically, hinged casement windows open outward like a door. This does provide some additional advantages:

• Casements lack protruding sashes allowing placement over sinks or counters.
• Outward swing catches prevailing breezes.
• Casement hardware compression seals tighter.

However, casement windows do have some limitations to consider:

• Hinged mechanisms have more moving parts requiring maintenance.
• Crank gears can deteriorate or get damaged.
• Larger sizes require heavy-duty hinge hardware.
• Casements allow less net window opening area.

Double hung pros and cons versus casements largely depend on specific needs and application challenges. But both deliver classic styling popular among homeowners.

Cost to Replace Double Hung Windows

Upgrading original double hung windows runs $600 to $1,000 per window on average. Specific replacement costs vary based on:

• Window dimensions - Larger windows equal bigger costs
• Replacement materials - Wood windows priciest option
• Energy efficient upgrades - Advanced glass and weatherstripping increase price
• Labor rates in your region - Impacts total installation price
• Accessories - Integral blinds, security bars, storm windows add cost

With the heavy weight of some original double hung windows requiring multiple workers, professional installation runs $200 to $500 per window additionally but ensures proper operation.

Saving on Replacement Double Hung Windows

Strategic ways to save on upgrading double hung windows include:

• Shop seasonal sales in fall and winter off-peak seasons
• Select affordable but durable vinyl frame materials
• Retain and restore existing window jambs if possible
• Group multiple window orders for contractor discounts

Updating worn components like sash balance springs or weatherstripping also extends savings rather than full frame replacements right away. Prioritizing efficiency upgrades in the highest use areas first controls costs while still boosting window performance.

Planning Your Double Hung Replacement Project

Thorough planning ensures a smooth and successful double hung replacement process. We recommend following these key steps:

1. Hire Reputable Contractors - Verify licensing, insurance, experience, and reviews
2. Evaluate Window Sizing - Confirm accurate measurements including jamb depth
3. Select Durable Materials - Consider operating conditions and lifetime use
4. Choose Window Features - Decide must-have options before ordering
5. Prepare for Installation Process - Allow several days for completion evaluating weather

During the window selection phase, be sure to explore energy star ratings, warranty coverage, hardware finishes, divided lite patterns, and sash opening limits that may impact safety depending on the positioning of your double hung windows.

Allocating adequate time for each planning step reduces errors and change orders. Always get every project detail in writing before signing agreements or putting down deposits.

Maintaining and Troubleshooting Your Double Hung

Basic preventative maintenance preserves the smooth function of your double hung windows. We recommend homeowners follow this simple routine care:

• Inspect window sash ropes and balance springs yearly
• Lubricate sash channel slides with silicone spray every 2-3 years
• Hand wash glass panes every 6 months using mild dish soap and water
• Check for air leaks around frames during high winds sealing gaps as needed
• Test window locks engage securely without sticking or catching

Addressing minor double hung window issues promptly also prevents more costly repairs long-term. Here's how to diagnose and correct a few common problems:

Addressing Sticking Windows

Over time debris accumulates in sash channels preventing smooth sliding. Remove sash stops securing the stationary panel. Carefully tilt, remove then clean each sliding panel. Vacuum slide channels before wiping dirt buildup with a clean lint-free cloth. Apply fresh silicone spray lubricant to the sides of sashes and interior tracks per the product instructions before reinstalling sashes and stops.

Fixing Broken Sash Cords

When sash cords fray the weight balance system fails. To replace broken cords, pry off interior stops to access weight pockets. Detach sash cords from old weights first then knot new cords securely to replacement weights with a tight double knot. Feed new cords over the pulley, attaching ends to the sash stile. Test windows open and shut smoothly before reapplying trim stops.

Eliminating Breezes and Drafts

For stubborn air leaks around aging frames, apply weatherstripping rated for windows ensuring compatibility with your frame material. Press seal strips firmly anchoring into place trimming any excess length. Silicone caulk also works for sealing corners and gaps under 1/4-inch wide. Allow full cure times before exposing caulk to consistent moisture or opening and shutting windows.

Frequently Asked Questions about Double Hungs

Homeowners often have additional questions about double hung windows. Below we answer some of the most common queries:

Why do my windows slide down on their own?

Overextended cords and worn weight pocket pulleys cause this issue. Have sash cords replaced and lubricate pulleys to prevent unintentional lowering.

What is the best way to clean divided lite windows?

Use a soft microfiber cloth, mild soap and water to gently clean muntins and glass panes. Avoid harsh chemicals or abrasive pads that could scratch fragile surfaces.

Should I repair or replace cloudy insulating glass panels?

Replacing the insulated glass unit usually makes more economic sense than attempting repairs once seals fail since the insulating gas is lost and not restorable.

How do I know if my windows contain lead paint?

Windows in homes built before 1978 may contain lead-based paint requiring safety precautions during renovations or disposal. Test kits available at hardware stores screen for lethal lead content.

What's the best way to weatherproof drafty double hung windows?

Apply weatherstripping around window frames and sashes to seal airflow paths. Insulating window inserts also boost protection during cold weather.

Traditional double hung windows bring versatility, ventilation and timeless curb appeal to all types of homes. With routine maintenance and upgrades utilizing energy efficient components, double hung windows continue providing reliable service for decades. Their functionality, aesthetics and architectural authenticity make double hung windows a sound choice when selecting replacement models or planning new builds.