Our Heritage Double Glazing is the Ideal Glazing Solution for Listed Buildings or Buildings of Historical Importance

If you’re looking to improve the thermal performance of a listed heritage property, upgrading your windows is essential. This is especially true for single-glazed windows in older and historic buildings. Outright window replacement in listed buildings however is often deemed inappropriate due to the conservation requirements, not to mention the stylistic changes that can come from changing to double glazing.

For heritage properties across Banbury and Oxfordshire, even simple measures like draught-proofing, shutters or curtains can significantly improve energy performance.

Our CN Slim Heritage Double Glazed Units provide an all-in-one solution that also maintains the aesthetic of your property. From a distance, your windows will still appear as single-glazed, preserving the character of your building while offering all the insulating benefits of double-glazing – ideal for saving on property heating bills

Why Choose Heritage Glazing for Your Historic Property?

At CN Glass we understand that upgrading windows in historic and listed buildings requires careful consideration to balance modern energy efficiency with preserving architectural charm. That’s why our heritage double glazing services are tailored to preserve the property while getting the most out of the benefits.

Here are just some of the key benefits of choosing our CN heritage glazing services:

  • Energy Efficiency – reduce your heat loss with our slim-profile heritage double-glazed units, designed for historic properties.
  • Aesthetic Authenticity - maintain the original look and feel of your windows with solutions that blend seamlessly into the existing design.
  • Conservation Compliance - meet planning and conservation guidelines with glazing that respects the character of your building.

Our heritage double-glazed windows ensure you don’t have to compromise on energy efficiency or aesthetics, making them an ideal choice for listed buildings.

Listed Building Windows - Things to Know

Listed Building Window Repairs

Heritage double glazing

 

Repair is the first option to consider when seeking to maintain the character of a building, Sections of the frame which are no longer sound can be cut out and replaced. Sashes can be freed, cords replaced and draught-proofing materials added discreetly.
Most timber windows have been replaced because the homeowner has wanted to reduce energy bills by installing double glazing. Aluminium and uPVC double glazing is not permitted by many planning applications and conservation laws.

Heritage Double Glazing Middle
Heritage Double Glazing Distance

Retaining The Original Windows

Retain your original windows by replacing the original single glazing with CN Slim Heritage Double Glazed Units. This is a form of double glazing with a cavity between the two glass panes that is thinner than that in conventional double glazed units. The CN Slim Heritage Double Glazed Units can be glazed into most existing single glazing glass rebates thereby allowing for the retention of the existing window casements and/or sashes, an important conservation aspect, as the installation of double glazing in historic buildings may be more acceptable in situations where it can be incorporated within the original joinery.

Our CN Slim Heritage Double Glazed Unit generally has a less efficient thermal performance than conventional double glazing but performs thermally very much better than single glazing. The thermal performance of a slim profile double glazed unit can, however, be improved significantly further by using technical glass and inert gas to fill the cavity.

Heritage Double Glazing Indoor
Heritage Double Glazing Night

Replacement Windows

If you’re concerned with conserving your buildings architectural heritage then it is essential when replacing the whole window or door to install a true reproduction of the original using traditional materials.

The right replacement window will combine all the performance benefits of a modern window with the authentic look and feel of a traditional window. And, because they are factory-made, with factory-applied paints and glazing systems, they offer a long service life of over 60 years, with simple maintenance, providing excellent value for money. Modern replacement timber windows will combine authenticity with modern demands such as high energy efficiency, security, low maintenance and a reassurance that they will last 60 years or more.

Heritage Double Glazing Example
Heritage Double Glazing Mapping

CASE STUDY: View Our Listed Property Window Replacement

Read about our Heritage Double Glazing for a Charming Cotswold Cottage. We transformed a listed heritage property with timer-framed flush casements featuring CN Slim Heritage Double Glazed Units. Working with conservation officers, we delivered a sympathetic, traditional solution that restored the cottage’s charm.

Read the full case study to learn how CN Glass can enhance your historic property.

Case Study Image

Need an alternative flexible solution? Try Secondary Glazing for Listed Buildings

For property owners looking to enhance energy efficiency while preserving historic charm, secondary glazing for listed buildings is another excellent alternative. This approach involves installing an additional layer of glazing on the inside of existing windows, offering improved thermal performance, noise reduction and preservation of original features.

Secondary glazing is particularly suitable for properties where double glazing for listed buildings may not be permitted outright.

Our Heritage Double Glazing Replacement Service

Why Choose CN Glass for your Heritage Property?

With decades of expertise in heritage glazing, CN Glass is a trusted partner for upgrading windows in listed and historic properties across Banbury, Oxfordshire, the Cotswolds, the Midlands and London. We specialise in:

  • Providing tailored solutions that meet conservation requirements.
  • Designing and installing double glazing for listed buildings.
  • Crafting heritage-sealed units that enhance energy efficiency without altering a building's appearance.

Call us on 01295 263 364 or contact one of our friendly team today for a quote.

Visit Our Showroom

To see examples of our Heritage Double Glazing and CN Slim Heritage Double Glazed Units drop by our showroom.
Speak to our Heritage Double glazing experts today!

Let’s get in touch

Contact CN Glass today to arrange a quotation. Reach us in the following options.

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Norton House, Beaumont Road
Banbury, Oxfordshire OX16 1SD

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