Everything You Need to Know About Sash Windows

Posted on June 17, 2025

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When it comes to upgrading your home or choosing windows for a new build, sash windows remain a classic and highly functional choice. Known for their timeless elegance and practical design, sash windows have been a staple of British architecture for centuries—and for good reason.

What Are Sash Windows?

Sash windows are a style of window that consists of one or more movable panels (or “sashes”) that slide vertically or horizontally to open and close. Unlike casement windows, which hinge open like a door, sash windows glide smoothly within a fixed frame.

They are most commonly associated with Georgian, Victorian, and Edwardian architecture, but modern innovations have made them suitable for contemporary homes as well.

Types of Sash Windows

1. Traditional Box Sash Windows

These use a weight and pulley system hidden inside the window frame to open and close the sashes. Typically made from timber, they are perfect for period properties where authenticity is essential.

Best for: Heritage homes, listed buildings
Benefits: Classic look, authentic design, excellent ventilation

2. Spring-Balanced Sash Windows

Instead of weights and pulleys, these use a modern spring mechanism. This style is ideal for new builds or homeowners looking for the sash window aesthetic without the traditional maintenance.

Best for: Modern homes, renovations
Benefits: Sleeker design, easier maintenance, good thermal efficiency

3. Sliding Sash Windows

These can be either vertical or horizontal (commonly called “Yorkshire sash” when horizontal). They maintain the traditional sash look but offer different spatial and functional benefits.

Best for: Versatile use across different property styles
Benefits: Space-saving, varied design options, improved airflow

4. uPVC Sash Windows

For those who want the appearance of timber but with less maintenance, uPVC sash windows offer durability and insulation benefits while mimicking the traditional sash style.

Best for: Cost-conscious homeowners, rental properties
Benefits: Low maintenance, weather-resistant, energy efficient

Why Choose Sash Windows?

Aesthetic Appeal: Their elegant, symmetrical design enhances curb appeal and adds character to any home.
Ventilation Control: The ability to open both the top and bottom sashes allows for better air circulation and temperature regulation.
Energy Efficiency: Modern sash windows can be double-glazed and draught-proofed to meet current energy standards.
Security: Today’s sash windows come with advanced locking systems, making them both beautiful and secure.
Value Addition: Installing high-quality sash windows can increase the value of your property, especially in conservation areas.

Photos

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London, UK}

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Bespoke Made Ltd.}

Let Us Help You Make the Right Choice

Whether you’re restoring a period property or adding charm to a contemporary home, sash windows are a smart, stylish option. At Bespoke Made Ltd., our expert team can guide you through the entire process—from selection to professional installation.

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