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Based in Cheddar, Majestic Designs (UK) Ltd is one of Somerset's highly recommended double glazing specialists.

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Most Energy Efficient Windows: Which is the Best Choice?

16th January 2024 |

Energy Efficiency

Aluminium DoorsOver the past few years, the UKs weather has been much more unpredictable. You are as likely to get a chilly day in April as you are in December and energy prices feel just as haphazard as the weather systems.

This means that, more than ever, your home needs to be energy efficient, versatile and ready for any weather or temperature, inclement or otherwise. By making better, more energy-efficient choices in your home improvements you can avoid excessive and costly energy bills, keep your home warm in the winter, cool in the summer and enhance your home security credentials.

For homeowners and landlords alike, replacing existing windows with energy-efficient uPVC or aluminium could be the perfect solution. Double glazed energy efficient windows, doors and conservatories improve the thermal retention of your home, as well as help to prevent annoying damp, condensation and mould.

At Majestic Designs, our range of uPVC and aluminium windows have a superior A+14 rating for energy efficiency and thermal retention, which means that our windows actually exceed the expectations of the WER scale, the system that measures and evaluates energy efficiency.

So, what are the most energy efficient windows on the market, do they work and how can they save you money in the long run?

How do energy-efficient windows work?

As the name suggests, an energy-efficient window is a window engineered for the purpose of improving the thermal retention of a home. The energy performance of a window comes down to how effectively the materials utilised can stop heat from passing through. How much sunlight can travel through the glass is also important, as well as the volume of air that is permitted to escape around the edges of the window.

A window that is deemed energy efficient is made of two or three glass panes which are sealed together in a single unit.

Double-glazed windows have two sheets of premium quality glass with a gap in between, with the total sealed unit measuring about 28mm. This consists of 4mm of glass, a 20mm ‘spacer bar’ to separate the glass panes and another 4mm of glass. Energy efficient triple-glazed windows have three sheets of glass and are engineered with two spacer bars and gaps.

With both double and triple glazing, the gaps between the panes of glass are filled with argon gas and sealed within a durable frame. Energy efficient window frames can be constructed in a variety of materials including timber, uPVC and aluminium.

A double-glazed or triple-glazed window without the addition of argon gas will not be as energy efficient, because heat will be able to transfer through more easily.

A window that offers superior energy efficiency includes:

  • Low-E glass – Low emissivity glass, also known as Low-E glass, is the most energy-efficient type of glass for use in double and triple glazing. Low-E glass has a very thin coating of metal oxide on one of the internal surfaces of the glass, for the purpose of reflecting heat back into your living spaces. This allows for the entry of sunlight and heat from the outside while also reflecting heat back into the house.
  • Pane spacers – As the name suggests, pane spacers are set around the interior edges of the glass panes within a unit for the purpose of keeping them apart. When purchasing energy-efficient windows it’s important to look for pace spacers containing little to no metal. This type of pace spacer is often referred to as a ‘warm edge spacer’ or ‘Thermoflex spacer’.
  • Frame materials – The materials used to create the window frame are equally important when it comes to securing the most energy efficient result. Both aluminium and uPVC offer exceptional thermal retention ratings, are 100% recyclable and require little to no maintenance.

How do energy efficiency ratings work with windows?

In the UK, windows are rated by the British Fenestration Ratings Council using the WER scale, also known as the Window Energy Rating scale. The WER measures energy efficiency with an alphabetical scale running from A to G, with the top-performing windows rated as A and above. The lowest-performing windows are rated G. When determining the energy rating of a window, the WER scale considers a variety of factors, including the U value, solar heat gain value (G value) and overall air leakage.

At Majestic Designs, our range of windows, doors and conservatories have an average of an A+14 energy rating. This is one of the highest possible energy efficiency ratings on the WER scale.

We offer high-quality double glazing as standard as well as using a variety of techniques to guarantee superior insulation in your home.

We design and engineer our own range of aluminium and uPVC windows with unique thermal reinforcement technology that enhances their thermal and acoustic insulation and UV ray filtering.This means your home is warmer and quieter with enhanced security and better protection from UV sun damage.

What are the most energy-efficient windows?

Chartwell Green Sash WindowsThese days, you’ll find that most energy-efficient windows are engineered from durable uPVC or aluminium. Available in a variety of different colours and styles, modern uPVC and aluminium windows are manufactured with energy efficiency and heightened security in mind with innovative double glazing, internal beading, weatherproof seals and other advanced features.

Aside from heightened thermal retention ratings, the benefits of modern uPVC and aluminium windows also include:

  • A more comfortable living space – Double glazing and other modern energy-efficient features assist your home in retaining heat. This means you’ll experience fewer draughts and cold spots, as well as warmer, drier living spaces.
  • Peace and quiet – Energy-efficient windows insulate your home against noise pollution. If you live in a busy area with high foot traffic or a busy road nearby, energy-efficient windows can transform your once noisy living spaces into a tranquil oasis. For further noise insulation, you can also opt for acoustic glass.
  • Reduced condensation, damp and mould – Windows that are energy efficient keep the heat in and the cold out. This means that energy-efficient windows can reduce the amount of condensation build-up within your home, educing instances of damp and mould.

Energy-efficient windows at Majestic Designs

How can you avoid a cold, damp home, expensive energy costs and rising fuel bills as the colder months approach?

By replacing your existing windows with energy-efficient uPVC or aluminium windows you’ll find the solution you are looking for.

Energy efficient windows, doors and conservatories will improve your home’s thermal insulation creating a warmer, drier and more comfortable living space for you to enjoy.

For more than 20 years, Majestic Designs have been engineering the very best energy-efficient windows for homes across the South West. Our range of aluminium and uPVC windows are engineered with care in Somerset in our state-of-the-art factory and boast an A+14 energy efficiency rating on the WER scale.

At Majestic Designs our fully employed team of FENSA-accredited and MTC-registered lead installers have cultivated a region-wide reputation for exceptional customer service and craftsmanship. We are proud to be widely considered the leading manufacturers of energy-efficient windows and doors here in the South West.

If you would like any more information about our energy-efficient windows and doors or are ready to book your at-home consultation, get in touch with our expert team today by giving us a call on 01934 741 294 or leaving us a message on our Contacts page.

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Customer Testimonials

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Local area installations

Serving clients across Somerset and the South West

Majestic Designs install quality double glazing products throughout Somerset. From Taunton to Yeovil and Weston-super-Mare to Wells; our insistence on quality installations and outstanding customer care remains the same. With our factories and showroom in Cheddar, we are conveniently located in the heart of Somerset, with easy access to the surrounding towns and villages. As part of the local community, we are dedicated to improving the lives of all our customers and by employing a local workforce we are investing in the future prosperity of the area.

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