Secondary Glazing

Secondary glazing is an excellent product that works wonders when looking to improve both the acoustic and thermal performance of any building or room when replacement windows are not an option.

Secondary glazing is best suited when improvements need to be made to the existing windows thermal and/or acoustic performance without altering the internal or external appearance of a building or room, such as but not limited to, period properties, conservation areas or steel windows which look great but offer poor acoustic and thermal insulation.

Secondary glazing can be manufactured incorporating vertical spring loaded sashes, horizontal sliders, fixed lights, curved sections or side hung hinged casements. The aluminium framework is supplied in a white powder coat finish as standard but can be supplied powder coated to any RAL or BS colour. Suitable glass types usually installed are 4mm/6mm float or toughened safety glass but for increased acoustic performance we specify 6.4mm laminated safety glass or 6.8mm acoustic glass although budget, location and customer requirements dictate which glass type is ultimately install. Secondary glazing requires no maintenance after installation with domestic or light commercial use life expectancy is 25 years.

Fabulous that secondary glazing is, be wary of companies claiming it to be the miracle cure for both acoustic and thermal insulation. It is a fantastic product and as a fair rule of thumb secondary glazing reduces acoustic levels in even the noisiest of locations by at least 50% and by as much as 80% in optimum conditions such as less noisy locations when incorporating acoustic or laminated glass and the distance between the existing glass and the secondary glazing being as close to 100mm as possible.

Sound penetrates a building or room via a number of ways such as through the existing window frames, glass, roof and walls and trying to achieve acoustic perfection with secondary glazing alone is an unfair demand on secondary glazing or any single product for that matter. Improving thermal efficiency using secondary glazing is difficult to quantify due to the many factors that affect a buildings thermal performance. Through experience we are confident that any thermal improvement to a building or room will be immense but the expected level of improvement using a percentage figure is difficult to confirm. When taking every aspect of a buildings acoustic and thermal performance into consideration, the installation of secondary glazing offers fantastic value for money whilst being a visually pleasing way of making a massive improvement without altering the appearance or function of the existing windows.

From point of order to installation is not normally more than four weeks with fitting being quick and clean with no making good required thereafter.

We offer a free site survey providing a same-day emailed quotation along with a sample window available for your inspection. We don’t employ salesmen, take orders or deposits during surveys as our own surveyor carry’s out all surveys and will run through the sample window and answer any questions you may have.

Please give our office a call or send an email to arrange your free site survey.