Authentic Sliding Sash Windows

  • Stylish Slim Sightlines
  • 100% Recyclable and Lead-Free
  • High Security Yale Locking Systems
  • Spring Balance Mechanism
  • Authentic Sash Horns
  • Tilt Function Available
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uPVC Sliding Sash Windows, Stevenage

Our Sliding Sash Windows are a beautiful choice for Stevenage properties, maintaining traditional aesthetics while adding a contemporary feel that will enhance the unique personality of your home. Choose Harlequin Windows for authentic Sliding Sash Windows in Stevenage, Hitchin, Letchworth, Baldock, Welwyn Garden City, St. Albans and across Hertfordshire.

Designed with ultra slim sightlines for improved views and hand finished for the best effect, our uPVC Sliding Sash Windows are an excellent choice for your Hertfordshire home.

With a wide range of colours and finishes to choose from, finding the best Sliding Sash Windows for you is easy.

Using high quality uPVC and impressive locking systems, your home will be kept safe and sound with our quality Sliding Sash Windows.

Features & Benefits


Sash Horns

Enhance the traditional look of your uPVC Sliding Sash Windows using optional decorative sash horns.


Tilt Function

Pivot bars are built in to allow a tilt function – great for secure ventilation and easy-cleaning.


Concealed Gaskets

Low level PCE gaskets offer protection from the harsh effects of Mother Nature, while remaining out of view.


Keep Children Safe

Keep little ones safe with optional restrictors that can be fitted to prevent the bottom sash sliding fully.


High Security

Available with high security cam locks, our Sliding Sash Windows are designed with your safety in mind.


Spring Balance Mechanism

Spiral Balances counteract the weight of the sliding sash to ensure operation is as smooth and effortless as possible.

uPVC Sliding Sash Windows

Update your Stevenage Home

Our Sliding Sash Windows offer the very best in authenticity, keeping your Stevenage property looking traditional yet with all the contemporary security benefits of 21st century uPVC. We understand that adhering to the period charm of a traditional property is important, which is why we always take care to recommend the right double glazing for your Hertfordshire home.

We have a wide range of colours and style options to offer, which makes finding the perfect double glazed windows in Hertfordshire easy. The quality of our uPVC is incredibly robust, giving your Stevenage home with authenticity of traditional wooden windows, but with contemporary security benefits.

Featuring concealed gaskets, our Sliding Sash Windows offer exceptional hardware that won’t encroach on the beautiful effect of the uPVC window design. The concealed gaskets offer optimum protection against the elements, while remaining hidden from view.

Secure Sliding Sash Windows

Keep your little ones safe with our secure Sliding Sash Windows. Optional restrictors can be fitted to keep the bottom sash from sliding fully – we wouldn’t want any unfortunate finger trapping to occur.

Installed with high security cam locks for optimum home safety, our Sliding Sash Windows will keep your Hertfordshire home safe and sound all year round.

With 30 years of experience installing high quality double glazing in Stevenage, we’re the experts in knowing a secure double glazed window when we see one – this is why we only install uPVC windows with the highest security measures available.

Choose Harlequin Windows today for your new double glazed windows in Hertfordshire.

Secure Sliding Sash Windows

Start your online quote today for competitive double glazing prices in Stevenage and across Hertfordshire.

If you’re looking for more information, give our helpful advisors a call on 0755 730 7296 or complete our online contact form. You’ll receive a quick reply that will have you on your way to quality double glazing in no time at all.