Double Glazing

Double and triple glazing vary when it comes to design, function and performance. Double glazing is a sealed unit, consisting of two glass panes with a spacer bar installed between the two. The glazing is sealed together into a single unit, with air and insulating gas trapped in the gap between the two panes. In comparison, triple glazing is made up of three glass panes and features two ‘gas and air pockets’ instead of one. It reduces drafts, and it’s a vast step up from single glazing – which involves a single pane of glass alone acting as a barrier between the inside and outside worlds. As anyone with single glazed windows likely knows, during the cold months, these lone panes can act like chilling units inside a home.
To make the website accessible and usable for all users, our website has been designed with a number of accessibility features. For a horizontal effect the maximum height is restricted to 1320 mm due to manufacture  orientation. If a vertical effect is required then the maximum height is limited to 2140 mm. Pilkington Texture Glass Warwick™ is a random pattern which has implications when cutting the glass down into finished sizes. If a pane is small enough, potentially there could be no evidence of the pattern at all.
If you find cheaper like for like uPVC windows elsewhere, we'll match the price. Our products are made from start to finish in a British factory by skilled craftspeople. Terms & Conditions.We continuously wish to improve and we kindly inform you that all incoming and outgoing phone calls may be recorded for quality and training purposes©2025 Duration Windows. Duration Windows is one of the UK's leading specialist aluminium trade manufacturers. Choose to have your Retro Panes professionally fitted by our team, or opt to install them yourself using the provided instructions, our video guide, or contact us for instant support. Our survey team will schedule a visit to assess and measure your windows.

Glazing directly impacts energy efficiency and comfort of your inner spaces. It does so by retaining warmth in the colder months and reflecting heat in the summer, removing or reducing your need for air conditioners or heaters. Low E glass and toned glass will give better temperature control within interiors while a double-glazed or triple-glazed model will assure an energy-rated home. Of course, the ‘best’ double-glazed windows often comes down to personal choice. So, it’s worth considering your budget, style and the practicalities of your consent windows before you make a decision. With so many types of windows to choose from, it can be confusing to know which style of double glazing is the best option for you.

We use only the highest grade, strongest and most durable aluminium to produce secondary glazing units of unparalleled quality. They are all crafted and engineered at our state-of-the-art manufacturing facility in Sheffield, incorporating best-of-British workmanship. Windows are the biggest cause of heat loss in residential buildings, with period properties having the highest percentage of single glazing in the country.

This coating reflects the heat generated inside the home back into the room, rather than allowing it to escape through the window. At the same time, it allows optimum amounts of sunlight to pass through the window. Our Advance glass Extension boasts a neutral appearance and a centre pane U value of 1.1W/2mK. Whilst a G value of 50% still allows for maximum solar heat gain into the property through the glass. Advance comparable thermal benefits to triple glazed sealed units but is much lighter meaning less strain on hinges and moving mechanisms and is a much more cost effective solution also. Secondary glazing enhances thermal insulation, reducing heat loss by up to 70% and improving energy efficiency The amount of heat saved depends on factors like the quality of installation and the type of material used.
They're ideal if you're looking for the most window for the price and if you love big panes that bring in lots of light. Mondrian glass extensions framed with steel profiles to create a Bauhaus style glazed extension. Ring beamThe beam above the window frames of the conservatory supports the roof. Lean-to conservatories are quick and easy to install and can be a practical and less expensive solution.
Silver coating must be enclosed within the glazing unit so that oxidation doesn't cause the degradation of the silver over time. With hundreds of options to choose from, Everest windows are designed to meet your needs. We use the best components to make quality windows that look good with attention to detail. At the core of everything we do, we're committed to developing the most energy efficient windows on the market with the lowest U-values in the UK. For large windows, such as 1200mm x 1200mm or bigger, you can place a couple of screws immediately below the secondary glazing panel to add support and prevent the chance of it slipping or detaching.

Using structural glass to create long runs of glass, connected together with silicone joints. Using minimal glass systems to create Juliet Balconies in a variety of designs. Revolutionary glass balustrade design with laminated glass top for a clear handrail design. Structural walk on frameless glass that can be spanned across an open space to create a bridge. Using structural glass to create large glass walls of any size and specification.
If measured and fitted correctly, it will essentially form a double glazed solution for your windows - that in turn helps with heat retention, condensation reduction and security. Secondary glazing should always be fitted on the interior side of your window. Triple glazing is generally more efficient at reducing heat loss than double glazing, but it may not always be necessary or cost-effective. In some cases, double glazing may be enough to meet energy efficiency standards, especially if you have other energy-saving measures such as wall insulation. If this applies to you, it’s also worth mentioning that double glazing isn’t where the buck stops when it comes to the best insulative glass options. Technology moves fast, and triple glazing is now a group of prominent Sydney businessmen began the process towards the acquisition of a professional hockey franchise for Sydney viable option on everything from small windows to large panels.