Heritage double glazing for wooden windows in Historic Properties

Double glazed windows are a valuable addition to any home and can provide insulation and noise reduction for homeowners.

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One of the options to improve the efficiency of period properties is to convert single-glazed windows by fitting heritage double glazing to existing sashes and replacing single glazing.

If you’re the owner of a historic property, choosing the right type of double-glazing unit is vital if you plan to retrofit your single-glazed windows with double glazing.

Many homeowners in conservation areas choose fitting heritage double glazing to exist frames over complete window replacement. This type of glazing uses two panes of glass with a space between them filled with an inert gas like argon or krypton.

Glazing solution for windows in conservation areas and windows in Grade 2 listed properties

Period window frames were not designed to hold double-glazed units, and glazing technology did not start with slim and efficient units.

Today slim double glazing is available, thanks to advances in glass and glazing technology. Thinner double-glazed units fit the narrow frames perfectly and have reduced sightlines.

What is heritage double glazing?

Heritage double glazing is a solution for windows in conservation areas and Grade 2 listed properties. The narrow sightlines and low-E glass of these units make them the perfect replacement for your old single-glazing while still allowing you to keep the historic look of your property.

Heritage double glazing, in other words, is slim-profile double-glazed units specially designed for heritage windows restoration projects or heritage narrow-frame new double-glazed windows.

The durability of gas-filled and vacuum-sealed heritage double-glazed units

There are two types of heritage double glazing units which are different by insulation method. The most common but less durable is the gas-filled heritage double glazing unit. These units are not as durable as the newer and better vacuum-sealed heritage double-glazing units. The second type, as you can probably guess, uses vacuum insulation physics. The vacuum offers superior gas insulation because it does not conduct heat.

How thick is heritage slim double glazing?

The thickness of heritage double glazing units is vital for many reasons mentioned above. The glass used in these units is usually between 4 and 6 mm thick, the same as in standard double glazing or triple glazed units, but the cavity is reduced to make the double glazing units thinner.

The typical unit make-up is 4/4/4, 3/4/3 and 3/0.3/03 for VIG units, which means two panes of 3-4mm glass, 0.3-4 mm spacer bar and another 3-4mm pane of glass.

What is the most effective double glazing for heritage windows?

The most effective double glazing for heritage windows is the vacuum-sealed unit. Same efficiency as triple glazed units, but thanks to the almost invisible cavity of 0.3, those units are ultra-thin.

Can double-glazed windows increase the value of the property?

Yes, it does. Double-glazed windows reduce energy bills and improve comfort; as a result, potential buyers are willing to pay more for double-glazed windows over single-glazed ones. Glazing is one of the points to cross off the list when considering ways to add value to your home.

Do you need planning permission for double glazing?

Yes, permission is usually required to install double glazing in conservation areas and Grade 2 listed properties. The local authority will need to assess whether the installation of double-glazing will affect the appearance of the property.

Slim double glazing creates a new niche in the window market.

Slim double glazing is one of those modern developments that creates a new market niche.

With developments of more durable and accessible vacuum glazing, the retrofitting segment in the window market will be gaining momentum in the coming years, offering a more economical option for homeowners of historic properties and preserving thousands of heritage windows across the UK.

Secondary glazing alternative

Before VIG double glazing, secondary glazing was the leading solution for draughty and single-glazed windows.

We believe that the leading position of secondary glazing as the primary solution for single-glazed windows is about to be shaken by vacuum-sealed units, as no one likes how bulky secondary glazing looks and the reduced functionality it possesses.

Alternative Solutions

Heritage double glazing is a type of glass that is designed to replicate the look of traditional leaded glass. It is made up of two sheets of glass with a layer of clear perspex in between them. Heritage double glazing is an excellent option if you want to maintain your property’s original look. However, it can be quite expensive and is not always the most energy-efficient option.

A Clear Perspex Sheet is an excellent alternative to heritage double glazing. It is much more affordable and can still give your property a traditional look. A clear perspex sheet is also a good option if you are looking for something that is more energy-efficient. However, it is essential to note that a clear perspex sheet is not as durable as heritage double glazing and may need to be replaced more often.

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Adam Regan

Deputy Editor

Features and account management. 3 years media experience. Previously covered features for online and print editions.

Email Adam@MarkMeets.com