A double-hung window has two sashes, top and bottom, and both of them move. That’s the whole distinction from a single-hung window, where only the bottom sash slides and the top one stays fixed in place. On a double-hung window, you can raise the bottom sash, lower the top sash, or open both at once.
Most double-hung windows built today also tilt inward. Release the sash locks along the sides and both sashes pivot in toward the room, which means you can wipe down the outside glass from inside your house instead of setting up a ladder. That inward tilt is one of the bigger differences from a casement window, which cranks outward on a hinge instead of sliding, or a slider window, which moves horizontally rather than up and down.
Opening, Closing, and Tilting the Sashes
Operating a double-hung window is a short routine once you know the steps:
- Release the sash lock or locks at the center of the window, where the top and bottom sash meet.
- Slide the bottom sash up, the top sash down, or both, depending on how much airflow you want.
- To clean the glass, release the tilt latches on the sides of a sash and rotate it inward.
- Return the sash to its upright position and re-engage the tilt latches before locking the window.
Some homeowners find the sashes stiff the first few times they operate a newly installed window. That typically eases as the balance system settles in. If a sash sticks or won’t stay in position after that, our guide to double-hung window parts and hardware walks through the balance system and lock components, so you know what to check before calling for service.
Why Double-Hung Ventilation Works Well
Opening both sashes on a double-hung window creates a natural airflow path: warmer air near the ceiling can move out through the top opening while cooler air enters low through the bottom. That two-way exchange is a big part of why homeowners choose double-hung windows for bathrooms, kitchens, and rooms where you want airflow without leaving the window fully open.
A Practical Safety Feature for Homes With Kids
Because the two sashes operate independently, you can open just the top sash for ventilation while keeping the bottom sash closed and locked. That gives you fresh air without creating a fall hazard at a height a child could reach. Pairing this with a working multi-point lock system adds a layer of security against forced entry, since there’s no single latch point to defeat.
Cleaning and Upkeep
Double-hung windows with vinyl frames don’t need painting or refinishing, which cuts down on the maintenance wood frames require. A simple upkeep routine covers most of it:
- Wipe down the sash tracks every few months to clear dust and debris that can make sashes stick.
- Check weatherstripping once a year for gaps or wear.
- Apply a small amount of silicone-based lubricant to hardware and tracks if a sash starts to feel stiff.
- Clean screens when you do seasonal window washing.
Style Options
Double-hung windows come in a range of frame colors, grille patterns (colonial and prairie-style grids are common choices), and glass options, including decorative and obscured glass for bathrooms or other privacy-sensitive rooms. Hardware finishes like brushed nickel and oil-rubbed bronze let you match existing fixtures in the room. For a closer look at how these choices play out by home style, see our double-hung window design guide.
Built for Mid-Atlantic Weather
Thompson Creek’s double-hung windows are custom-manufactured at our 120,000 sq ft facility in Upper Marlboro, Maryland, and are AAMA-tested to withstand winds up to 146 mph. Fusion-welded vinyl frames and multi-chamber construction help the windows hold up to the humidity, temperature swings, and storm exposure common across Maryland, Virginia, and the District of Columbia.
What This Means for Your Home
If your current windows are single-hung, switching to double-hung typically doesn’t require any changes to your siding or exterior trim, since the new units are built to fit the existing opening. Double-hung windows also work well in historic homes, since Thompson Creek custom-manufactures each window to match the original opening dimensions rather than forcing a standard size.
Every Thompson Creek window purchase is backed by the 50-Year No-Hassle Warranty, with professional installation backed by Thompson Creek. Family-owned since 1980, Thompson Creek has served homeowners across the Mid-Atlantic, backed by more than 71,000 five-star reviews.
Frequently Asked Questions
How long do double-hung windows last?
With basic maintenance, most vinyl double-hung windows last 20 to 25 years or longer.
Can I replace single-hung windows with double-hung windows without changing my siding?
In most cases, yes. Thompson Creek custom-manufactures replacement windows to fit your existing opening.
Are double-hung windows a good option for historic homes?
Yes. Because each window is custom-built to specification, double-hung replacements can match the proportions of original historic window openings.
Do double-hung windows cost more than single-hung windows?
Double-hung windows are generally priced higher than single-hung windows because of the added hardware and second operable sash. A Thompson Creek design consultant can walk through the specific factors that affect pricing for your home during a free, no-obligation estimate.
Ready to see how double-hung windows would work in your home? Get a free estimate from Thompson Creek.
