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Cottage windowDouble-hung window where the upper sash is shorter than the bottom sash.

The rest is completely up to you – as far as style and choosing among all of the many customisable specifications that Klar windows feature.

It can be scuffed a little more easily than glass, but this does not occur in normal use and can be polished out.

We'll calculate pricing to upgrade any or all of your windows, including our optional installation service.

Extremely high UV and weather resistance are absolute requirements in these applications.

Offering more than double the sound protection as well as increased thermal insulation.

Secondary glazing offers multiple key features that enhance window performance, including significant sound insulation, improved energy efficiency, and condensation reduction.

Our glazing styles are available with varying levels of opacity, so you can choose a glass design that looks and performs as you need it to.

Please note that we may process your personal data without your knowledge or consent, in compliance with the above rules, where this is required or permitted by law.

Secondary glazing units are normally single glazed, glass or lightweight polycarbonate sheet.

Take care when cleaning acrylic and polycarbonate and do not use glass cleaner or similar products when cleaning, otherwise the secondary glazing may become dull.

The air gap inside the double glazing sandwich helps to keep the internal pane of glass closer to room temperature.

Again, this isn’t like mixing paints, you might find it does something unexpected.

The results are staggering, with reduced noise levels of up to 80% and a reduction in heat loss of up to 65%.

Leeds Glass are spets in secondary glazing – developed over 20 years to provide the ultimate effective insulation against external noise and maintain high thermal insulation.

Many windows also come with Low-E (low emissivity) coatings on one of the glass surfaces, for improved thermal performance.

You can then clean your original windows and the CosyGlazing units before popping them back on.

However, some metal or leaded windows may require the input of metal/leaded window spets.

If it is stormy or extremely cold outside, you can insulate with a low U-value thermal glazing.

Our glazing has been developed to meet the demanding aesthetics & technicalities of many periods, including Georgian, Victorian, Edwardian and even twentieth-century properties.