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PVC sash window conservation

Our products

Sash Windows Scotland manufacture the Rehau Heritage window - designed to replicate the sightlines and operation of their original timber box sash counterparts but with all the benefits of modern uPVC windows. If you are needing to replace your box sash windows but are worried about compromising the character of your home, our Rehau Heritage windows are the answer you've been looking for.

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Sliding Sash Windows

Our Rehau Heritage vertical sliding sash window is designed to replicate traditional timber box sash windows with all the advantages of uPVC.

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At Sash Windows Scotland we are proud to be one of the only in-house manufacturers of vertical sliding windows in Scotland. Our windows are crafted exclusively with Rehau profiles, the market leading PVC window system. Our Rehau Heritage windows have been designed to replicate as much as possible the appearance and sight lines of  original sash windows, while benefiting from modern thermal efficiency and a smooth and easy operation.

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Retain the character

Our Rehau Heritage windows replicate the look of timber sash windows - so you keep the character of your home but vastly improve the thermal efficiency and quality of your windows - and you won't ever need to paint them again! With the rules in conservation area windows changing in 2024 you can now rest assured our uPVC sash windows meet the criteria, whereas normal uPVC windows don't. 

Best of both worlds

With the Rehau Heritage vertical slider, you can have the very best of both worlds. Combining the most authentic looking sash window available with modern uPVC finishes, your windows will never need painted and won’t rot, peel or flake. Multiple seals ensure a draught-free environment while the energy efficient double or triple glazing virtually eliminates internal condensation.

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Innovative design

Our vertical sash windows slide up and down effortlessly on pre-tensioned balances. They also tilt inwards on reinforced steel latches for easy cleaning. Other great features include:
 

  • Can achieve the performance of an A rated window

  • Available in a variety of foiled colour

  • Optional surface mounted Georgian astragals

  • Exclusive run through horns for the most authentic look

  • Enhanced security

  • Furniture options of brass, chrome, brushed chrome, white or black

run through horn

Exclusive Run Through
Sash Horns

Our Rehau Heritage vertical sliding sash window is designed to replicate traditional timber box sash windows with all the advantages of uPVC.

run through horn

Modern uPVC replacement

Sash horns were a distinct and important feature of traditional timber sash windows and were introduced to add strength to the joint between the frame and the meeting rail.

Traditional replica

Until now, uPVC sash windows have had a “bolt on” horn to try and replicate the look but can be clearly seen to be an extra piece added on that gives away the window as being an imposter.

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Since our new run through horn is seamless, it helps to maintain the integrity of the building while giving the aesthetics of traditional timber windows.

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REHAU Heritage Run Though Sash Horn

Authentic appearance

Rehau’s Heritage sash windows are already widely recognised as the most authentic looking sash window available.

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Now that we are the only Scottish company that can offer the run through sash horn, our window is virtually identical to the traditional timber sash window.

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Encapsulated Glass

Restoring and Protecting Your Stained Glass

We specialize in restoring and encapsulating old stained glass, providing a modern solution that preserves the beauty and heritage of your property, while enhancing protection and improving energy-efficiency.

Want new energy efficient sash windows but don't want to lose your stained glass? No problem, we take care of everything for you. When we remove your old windows we carefully remove, clean and repair (if necessary) your stained glass before encapsulating it within a new double glazed unit.

Your new windows will be fitted with a temporary clear double glazed unit while your original stained glass gets it's makeover. When it's ready and we come back out to fit it, your stained glass will never have looked better - and it always will - as it is safely protected from dirt, dust and the elements in the middle of a new toughened safety glass unit. 

See some of our encapsulated glass examples here

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Astragal Bars

The perfect blend of classic style and contemporary performance

Enhance your sash windows with our high-quality astragal bars. Perfect for achieving the traditional divided-pane look, these decorative bars amplify the aesthetic appeal of your windows while maintaining the functionality of modern sliding sash windows. Whether you’re restoring a period property or updating your home’s design, Astragal Bars offer the perfect blend of classic style and contemporary performance.

Rehau Heritage

Get in touch

To arrange a visit or to request further information, use our online enquiry form or simply give us a call on 01355 261657.

Let's discuss 
your next project

Fill out the form, or call us to

set up a free quote.

Tel:

01355 207181

Email:

info@sashwindowsscotland.co.uk

 

Opening times

Monday to Friday: 8.30 am – 5 pm

Saturday: 9.30am – 11.30am

Sash Windows Scotland | 16 Hawbank Road | College Milton | East Kilbride | G74 5HA

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© 2025 Quality Trade Windows Group Ltd.

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