Secondary Glazing For Period Properties Specialist Installers

Our secondary glazing is manufactured using state-of-the-art machinery to lock-in a tightly sealed frame which reduces noise levels by up to a whopping 80%. Double glazing reduces heat loss through the window by creating a barrier that slows down the transfer of heat. Heat can transfer through a window in several ways, including conduction, convection, and radiation.
It’s generally cheaper than replacing windows with double glazing and can lead to energy savings by reducing heat loss, which lowers heating bills. Additionally, secondary glazing is highly effective for soundproofing, making it valuable for those living in noisy areas like city centers or near airports. It’s also a practical option for heritage or listed buildings, where altering the original windows isn’t allowed. Secondary glazing involves adding a movable second layer of glass or plastic to the frame of existing single glazed units. Installed on the window’s interior, it’s fully independent and doesn’t form a sealed unit like double glazed windows.

If conventional double glazing is not possible, such as in a listed building or with stained-glass windows, secondary glazing is the ultimate solution for insulating your building. In our blog we use the term ‘secondary glazing’ for an extra window mounted on the inside of an existing window. This means you must make sure to check for proper adhesion with the latest window frame types (various types of PVC, foil or coated aluminium). Soudal takes care to stay up-to-date with these developments so as to be able to guarantee optimal adhesion.

With options including triple glazed glass doors available, if you’re looking for the very best insulative solution on the market, double glazing may no longer be the best choice for you. At face value, an improvement in terms of heat loss through glazing from 1.1 W/m²K to 0.6 W/m²K sounds like an improvement worth paying for. The Window Energy Rating Scheme, widely accepted as the industry standard for judging thermal performance and written into Building Regulations, calculates solar gain as well as heat loss. This means that the triple glazed unit’s improved heat loss credentials are largely negated by the reduction of warmth created by sunshine. The solution would be to increase solar gain by using Low Iron glass, which is much more translucent than the traditional variety but can be considerably more expensive.

Any of our glass specifications can be combined with a 6.8mm laminate pane, which further lowers both the U- Value and solar heat gain and offers increased noise reduction of 30-32db. Shield boasts additional benefits including significantly reducing UV light entry through your glazing, greatly reducing fading of your interior furniture and flooring. In well-insulated homes, however, windows become a key element in energy efficiency, making triple glazing a worthwhile investment. For homes with less insulation, double glazing provides the best balance of price and performance before you need to consider other costly upgrades to walls and roofs. Glazing’s energy efficiency can also be improved by opting for low emissivity glass (aka Low-E glass).
The cost of double glazing can vary depending on several factors, such as the size and type of the window, the material of the frame, the type of glass used and the installation costs. As a general guideline, the cost of double glazing for a standard-sized window can range from a few hundred to a few thousand pounds, depending on the above factors. But it's important to note that the cost can be higher for larger or more complex windows, or for windows made from premium materials. If you’re in a position where money isn’t as much of a concern, and you’re purely considering double glazing as a practical option, then it’s almost always the best choice. The added heat loss reduction and acoustic insulation it provides improve the quality of interior spaces immensely. If this is the case, then often double glazing is entirely worth the additional expenditure.

As cold air hits the external pane of glass, the pane of glass transfers the temperature to the Argon gas layer. Also, without support, the glass can quickly slump and fail in the extreme heat of a fire. If you have any particular paint colours or newly decorated joinery, we will need to match that same paint to paint the areas we disturb when we complete your installation. With that in mind, you will need to provide us with paint details (make and colour) if you require us to supply paint.