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What Are Double Hung Windows?
A double hung window is characterized by two vertically stacked sashes that can move independently. You can slide the lower sash up or the upper sash down (or both simultaneously) to let in fresh air or expel stale indoor air. Unlike single hung windows, in which the upper sash remains fixed, double hung windows give you twice the ventilation flexibility and often include tilt-in sashes for easier cleaning.
Improved Airflow
By opening both sashes slightly, you create a convection current—cool air enters through the bottom, while warm air escapes through the top.
Easy Upkeep
Many double hung windows allow the sashes to tilt inward, simplifying exterior glass cleaning from inside your home.
Flexible Placement
Suitable for bedrooms, living areas, and kitchens alike, thanks to their timeless appearance and convenient operation.
Key Features of Double Hung Windows
- Superior Ventilation
Opening both the top and bottom sashes promotes efficient air circulation. - Easy Cleaning
Most double hung designs offer tilt-in sashes, allowing you to clean exterior glass from the inside. - Versatility
Complements a wide range of architectural styles, from historic townhouses to modern suburban homes. - Energy Efficiency
With advanced weather stripping and insulated glass, double hung windows can significantly improve your home’s thermal performance. - Child Safety
You can open the upper sash while keeping the lower sash closed, providing fresh air without compromising on child or pet safety.
Frequently Asked Questions (FAQ)
Are double hung windows more energy-efficient than single hung windows?
Generally, they can be if both sashes and the frame are well-constructed. However, energy efficiency depends on multiple factors such as the glazing type, weatherstripping, and proper installation. Look for ENERGY STAR labels for the best performance.
Do double hung windows cost significantly more than single hung?
Yes, double hung windows typically cost more because of their extra moving sash and more complex hardware. However, the increase in ventilation and ease of cleaning often justifies the added expense.
Is it possible to replace only one sash if it’s damaged?
It depends on the manufacturer and the specific model. Some brands offer replacement sashes or balance systems, while others may require an entire window replacement.
What if the window doesn’t stay up when I raise the lower sash?
This usually indicates a problem with the balance system (springs or cords). You might need to replace or adjust the balance components to restore proper functionality.
Can I install double hung windows myself?
While a skilled DIY enthusiast might tackle the job, professional installation is highly recommended. Proper installation ensures optimal insulation, long-lasting functionality, and adherence to local building codes.
Do double hung windows work well in high-humidity rooms like bathrooms or kitchens?
They can, especially if you choose moisture-resistant materials (e.g., vinyl or fiberglass) and ensure adequate ventilation. The ability to open both sashes aids in reducing humidity buildup.
Can I open only the top sash for safety reasons?
Absolutely. One of the major benefits of double hung windows is the option to keep the lower sash locked in place while opening the upper sash for ventilation – especially beneficial if you have young children or pets.