What Is a Double Hung Sash Window?
If you’ve ever admired the classic charm of traditional windows that slide open from both the top and bottom, you’ve likely come across a double hung sash window.
These windows have been a staple of British architecture for centuries, offering both elegance and practicality.
But what exactly are double hung sash windows, and why do so many homeowners and designers still choose them today?
Understanding the Double Hung Sash Window
A double hung sash window features two movable panels (known as sashes) that slide vertically within the frame. Unlike a single hung sash, where only the bottom sash moves, a double hung sash allows both the upper and lower sashes to open.
This design makes it easy to control ventilation. You can open the top sash to let warm air escape while opening the bottom sash to draw in cool air. It’s a simple yet effective way to improve airflow in your home without relying heavily on modern air conditioning.
What Is a Double Hung Window?
In short, a double hung window is a type of sash window with two operable sashes that move up and down. The term is often used interchangeably with double hung sash window, especially in traditional British homes or period properties where the sash style is common.
These windows are known for their timeless appearance, often featuring slender wooden frames and traditional glazing bars. At MJ Kloss Carpentry and Joinery, we craft bespoke double hung sash windows that not only match the character of your property but also meet modern insulation and security standards.
Types of Double Hung Sash Windows: Box and Spring
A double hung sash window can come in two main types: box sash and spring sash. The traditional box sash window uses a system of cords, pulleys, and counterweights hidden inside a box frame to balance the two moveable sashes. This classic method gives a smooth, timeless operation that’s ideal for period homes.
The more modern spring sash window, sometimes called a spiral balance sash, replaces the weights and cords with a concealed spring mechanism. This creates a slimmer frame and can make installation simpler, while still allowing both sashes to move independently.
Whether you prefer the authenticity of a box sash or the practicality of a spring sash, both offer the same double hung function — easy ventilation and elegant style.
The Benefits of Double Hung Sash Windows
Choosing double hung windows offers several advantages beyond their aesthetic appeal:
- Better ventilation: The ability to open both sashes gives you greater control over airflow.
- Ease of cleaning: Many modern versions tilt inward, making them easier to clean from the inside.
- Energy efficiency: When well-fitted, double hung sash windows can improve thermal performance and reduce draughts. Having Double glazing sash window also increase efficiency
- Classic design: They suit both period properties and modern homes aiming for a timeless look.
Whether you’re restoring a Georgian townhouse or upgrading a Victorian terrace, a double sash window design complements almost any architectural style.
Double Hung Replacement Windows
If your original sash windows are damaged or draughty, you don’t necessarily need to replace them completely. At MJ Kloss Carpentry and Joinery, we specialise in double hung replacement windows, which are designed to replicate the appearance of your existing sashes while improving efficiency and security.
We can repair or replicate traditional joinery details using quality hardwood or softwood, depending on your preference. Our aim is to preserve your home’s character while providing smooth operation and long-lasting performance.
Double Hung Window Sash Craftsmanship
A well-made double hung window sash combines precise craftsmanship with durable materials. Each sash is counterbalanced by hidden weights or modern spring mechanisms, allowing smooth, easy movement.
Our team at MJ Kloss takes pride in producing handcrafted double hung sash windows that operate beautifully and stand the test of time. Every window is built to order, ensuring a perfect fit and finish for your property.
Maintaining Your Double Hung Sash Windows
To keep your double hung sash windows in top condition, regular maintenance is key. Clean the tracks and glazing regularly, check the cords or balances, and ensure that the paint or varnish is intact to protect the timber from moisture.
If you notice any sticking, rattling, or draughts, our carpenters can provide expert repairs to restore your windows to their original smooth operation.
Bespoke Double Hung Sash Windows by MJ Kloss
At MJ Kloss Carpentry and Joinery, we design, repair, and install double hung sash windows across London. Whether you’re replacing worn-out windows or planning a full renovation, we’ll craft windows that suit your home’s style and your exact requirements.
Our bespoke service means every detail—from the glazing to the mouldings—is tailored to you. We combine traditional joinery techniques with modern materials to deliver beautiful, energy-efficient results.
Thinking About New or Replacement Double Hung Sash Windows?
Get in touch with our team to discuss your project. We’ll help you choose the right materials, finishes, and designs for your property, ensuring your double hung windows look great and perform well for years to come.
Visit MJ Kloss Carpentry and Joinery to learn more about our sash window services or request a free consultation.
