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Premium Sliding Sash Windows

Experience the timeless elegance of traditional sliding sash windows with modern performance - perfect for period properties and conservation areas

⭐⭐⭐⭐⭐Rated 4.9/5 from 300+ reviews

10 Year Sash & Balance Guarantee

Classic Sash, Modern Efficiency

Why Choose Sliding Sash Windows for Your UK Property?

Traditional Box Sash Windows with Modern Benefits

Dating back to the 17th century, sliding sash windows are an iconic architectural element that combines timeless elegance with practical functionality. Our vertical sliding sash windows feature traditional operation with modern innovations.

Available in timber, uPVC, and aluminum options, each sliding sash window is custom-manufactured to your specifications, offering superior ventilation through both top and bottom sashes, enhanced security features, and a choice of traditional or contemporary styling. Perfect for period properties and conservation areas alike.

Traditional Elegance

Perfect for period properties and conservation areas

Superior Ventilation

Dual sash operation for optimal natural airflow

Modern Innovation

Tilt-in feature for easy cleaning and maintenance

Sliding sash windows installation showcase with traditional period detailing and modern performance

Built for lasting performance

Engineered for modern living

Handcrafted

Using heritage methods

Energy Savings

With modern double glazing

Year Guarantee

Sash & Balance warranty

Years Lifespan

With proper maintenance

0.0

Star Rating

300+ verified reviews

20% OFF

Your First Project

Limited time offer for new customers. Transform your home with our premium Sliding Sash windows.

*Terms and conditions apply. Offer valid until end of month.

Key Benefits of Sliding Sash Windows

Why Choose Sliding Sash Windows

Sliding sash windows combine period charm with excellent ventilation, featuring traditional vertical operation and modern innovations for enhanced comfort and authenticity.

Long Lasting

Built using premium materials and traditional craftsmanship, our sliding sash windows are designed to maintain their beauty and function.

Award Winning

Our sliding sash windows have been recognized for their exceptional quality, design authenticity, and modern performance.

Expert Installation

Our skilled craftsmen ensure perfect fitting and operation, with attention to every period detail and modern requirement.

Easy Maintenance

Innovative tilt function allows for safe and easy cleaning from inside your home, while durable materials minimize maintenance needs.

Harrington sliding sash windows showcasing traditional elegance and modern functionality

Classic Design with Modern Performance

Our sliding sash windows combine traditional aesthetics with contemporary innovation. Featuring authentic period details alongside modern thermal efficiency and smooth operation, they provide the perfect balance of heritage charm and practical functionality.

Excellent ventilation with dual sash operation
A-rated energy efficiency available
Enhanced security with modern locking systems

Sliding Sash Windows Product Details

Engineered for Excellence and Heritage Appeal

Sliding Sash Windows Design Features

Our sliding sash windows combine authentic period aesthetics with modern engineering, creating box sash windows that honor traditional design while delivering contemporary performance.

Vertical Sliding Operation

Traditional vertical sliding mechanism that allows both top and bottom sashes to move independently for flexible ventilation control.

Authentic Period Details

Carefully crafted features including decorative horns, astragal bars, and traditional hardware that replicate the look of original timber sash windows.

Easy-Clean Tilt Function

Modern tilt-in mechanism allowing both sashes to tilt inward for safe and convenient cleaning from inside your home.

Heritage Design

With modern functionality

Sliding Sash Windows Installation Process

How we expertly fit your traditional sliding sash windows

Free Consultation & Measure

Our window specialists visit your home to assess your existing windows, take precise measurements, and discuss sliding sash window options that complement your property's architectural style.

Detailed Design & Quote

We create detailed designs for your sliding sash windows, considering elements like glazing bars, sash horns, and hardware finishes, then provide a transparent, no-obligation quote.

Manufacturing

Your sliding sash windows are meticulously crafted using traditional techniques combined with modern materials to ensure authentic appearance with superior performance.

Professional Installation

Our specialist installers carefully remove existing windows and fit your sliding sash windows with precision, ensuring smooth operation and perfect weatherproofing.

Final Inspection & Aftercare

We demonstrate how to operate and maintain your sliding sash windows, complete a thorough inspection, and provide comprehensive documentation for your warranty and care instructions.

Sliding sash windows installation step 1 - professional fitting process

Free Consultation & Measure

We take precise measurements of your existing windows and discuss your preferences for sliding sash window designs, hardware finishes, and glazing options. Our specialists will evaluate your property's architectural style to recommend the most suitable traditional or contemporary sliding sash solutions.

Free Service

No cost, no pressure

Sliding Sash Windows Gallery

See our sliding sash windows in action

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Our Guarantee

Sliding sash windows you can trust for decades

20-Year Sash Frame Guarantee

Our sliding sash window frames are guaranteed to maintain their structural integrity, smooth operation, and traditional appearance for 20 years.

10-Year Balance Mechanism Warranty

All our sliding sash windows feature premium balance systems backed by a dedicated 10-year warranty ensuring smooth, reliable operation.

Insurance-Backed Guarantee

For complete reassurance, all our sliding sash window guarantees are insurance-backed by specialist heritage window insurers.

Specialist Sash Window Service Promise

Our dedicated sliding sash window specialists will respond within 48 hours to address any operational or maintenance concerns with your windows.

Our Promise to You

We stand behind the quality of our sliding sash windows and specialist installation. Each window is crafted with pride, combining traditional craftsmanship with modern performance to ensure your complete satisfaction for decades to come.

Customer Testimonials

Hear from our satisfied clients

★★★★★

The sliding sash windows have transformed our Victorian property. They're perfectly in keeping with the period style but with all the modern benefits of energy efficiency and security.

Sarah Thompson

Cambridge

★★★★★

Harrington's craftsmanship is exceptional. The sliding sash windows operate smoothly and have significantly reduced outside noise. They look absolutely authentic too.

James Wilson

London

★★★★★

From consultation to installation, Harrington Windows provided excellent service. Our new sliding sash windows look stunning and the tilt feature makes cleaning so easy.

Emma Roberts

Essex

★★★★★

4.9 out of 5

★★★★★

9.87 out of 10

Standard Sash Windows

Good - dual sash operation

Modern Casement Windows

Limited opening options

Feature	Our Sliding Sash Windows	Standard Sash Windows	Modern Casement Windows
Energy Efficiency	A-rated with modern glazing	B-C Rated	A+ Rated
Security	Advanced sash locks and limiters	Basic sash locks	Multi-point locking system
Maintenance	Easy-clean tilt function	Regular cord maintenance	Minimal - wipe clean
Lifespan	25+ years with proper care	15-20 years	20-30 years
Weather Resistance	Excellent with brush seals	Good with regular adjustment	Excellent
Noise Reduction	Superior with specialized glazing	Moderate	Very good
Period Authenticity	Perfect for heritage properties	Good for period homes	Not suited for period properties
Ventilation Control	Excellent - adjustable top and bottom	Good - dual sash operation	Limited opening options

Need help deciding on the perfect sliding sash solution for your property? Our experts can guide you through the options and help you choose the ideal sliding sash windows for your home's style and your budget.