Your windows are responsible for a good proportion of your home’s heat loss. This shows up directly on energy bills every winter.
Protect yourself and your savings with new energy-efficient windows.
The Advanced Group supplies uPVC windows throughout Scotland, with double and triple glazed units that carry A-rated Window Energy Ratings and U-values as low as 0.8 W/m²K.
For some of the best energy efficient windows on the marketplace, reach out to our team today to learn more.
Window energy ratings explained (WER and U-values)
Before we begin, it is important to be familiar with the two measurements that come up most often when discussing energy efficiency for windows.
Window Energy Ratings and U-values.
Both describe the window’s energy performance, but they measure it differently.
Window Energy Ratings (WER)
The Window Energy Rating scheme is run by the British Fenestration Rating Council (BFRC).
Window manufacturers submit products for independent testing, and the energy efficiency of their products is rated on a scale from G (lowest) to A (highest).
Windows with an energy rating of A are the best-performing band available from UK window manufacturers. The WER looks at the whole window (glass, frame, and seals together) and accounts for both heat loss and solar gain.
A window’s energy rating gives a practical, comparable measure of overall energy efficiency across different products.
At The Advanced Group, we are proud that our energy efficient double glazed windows and triple glazed units both carry an A-rated Window Energy Rating as standard. This gives our customers the very best on the market.
U-values explained
A U-value measures heat flow through the whole window in watts per square metre per kelvin (W/m²K).
Lower is better.
The lower the U-value, the less heat passes through the window per degree of temperature difference between inside and outside.
Our Advanced uPVC profile achieves U-values as low as 0.8 W/m²K for fantastic protection.
The most energy efficient glazing options
Double glazed windows with low-E glass
Double glazing seals two panes of glass into an insulated glazing unit with a cavity between them.
The energy efficient type of glass used in each pane, and the gas fill in the cavity, both determine how well the unit performs thermally.
Low-E glass (low emissivity glass) has a thin metallic coating on the surface facing the cavity. The coating reflects infrared heat back into the room while still letting visible light through the glazed window.
Without low-E, heat passes through the glass towards the cold side of the window and is lost to the outside.
All of our double glazed units include low-E glass as standard.
Every cavity is filled with argon, an inert gas denser than air, which slows heat movement across the cavity more effectively than air-filled units of the same specification.
Triple glazing
If you are looking for the very best of the best, consider our triple glazing products.
These add an extra, third pane and a second sealed cavity. This means heat needs to transfer between two insulated gaps to cross rather than one.
By choosing our triple glazed windows filled with dense argon gas seals, you can achieve a U-value as low as 0.8 W/m²K!
This gives you substantial savings on your heating bills.
For homes in exposed locations, under pressure from rising heating bills, or under attack by our harsh Scottish climate, this improved thermal efficiency can do wonders for your living conditions.
Window frame material and energy efficiency
The frame material affects the whole window U-value, not just the glazing.
A frame with high thermal conductivity transfers heat from inside to outside, reducing the overall energy performance of even a well-specified glass unit.
When measuring energy efficiency, the frame is always part of the calculation.
The Advanced Group’s uPVC frames
There is a reason why we are so passionate about uPVC.
uPVC has naturally low thermal conductivity, it is low maintenance, and is resistant against warping from Scotland’s ever-changing weather.
Our frame profiles add multiple internal chambers through each frame section, creating still air pockets that reduce heat movement through the frame and improve the window’s overall energy rating.
We stand behind the quality of our frames.
That’s why all of our new windows come with a 15-year guarantee, so you can feel confident in the quality too.
Installing energy efficient windows: what to expect
It isn’t just the quality of the product. For the maximum benefits of energy efficiency, they must be installed properly as well.
The Advanced Group handles installation ourselves with our team of experienced installers to ensure your quality windows are getting fitted perfectly.
Here is exactly what to expect from our installation process.
Survey and specification
We start with a free home survey.
A surveyor measures each opening, checks the existing frames, and talks through glazing options with no obligation to proceed.
The advice covers what improvement you can realistically expect at your specific property, including guidance on whether to use double or triple glazing.
After the survey, we specify the right windows for your home.
You’ll choose windows from our complete A-rated double and triple glazing range based on your priorities.
What’s more is that all our windows are backed by our 15-year guarantee period.
Made to order
Your chosen window configurations will be sent to our trusted manufacturers who share our commitment to high-quality craftsmanship.
We will provide you with an upfront lead time and organise an installation date that suits you.
Hassle-free installation
The Advanced Group’s team of expert installers will carefully remove your old windows, making sure to responsibly dispose of them on your behalf.
Your new windows will be carefully fit into your property, and the team will take their time to clean after installation is complete.
Before leaving, always take the time to show you how to work your brand new windows and provide you with your written guarantee should an issue occur.
Why choose The Advanced Group for energy efficient windows and doors
We have been providing stunning, energy efficient window throughout Scotland since 1988.
With over 38 years of home improvement expertise, we know exactly what goes into a great quality product and a fantastic fit.
We never sell items that we wouldn’t be happy having in our own home. That’s why all glazing carries an A-rated Window Energy Rating and a 15 year guarantee.
Check out our over 200 verified Google reviews to see for yourself how much we care about the service we provide!
We cover Glasgow, Edinburgh, Aberdeen, and more, with window installation throughout Scotland. If you aren’t sure whether we cover your area, give our team a call today and we will be more than happy to let you know.
Energy efficient doors
Our energy efficient doors are specified to the same standard as our windows, so you can save energy across every part of the building envelope.
Replacing old windows and old doors together helps to reduce energy loss more completely than windows alone.
But it isn’t just a great way to reduce your energy bills, it is a great way to help reduce your carbon footprint too.
Every unit of heat retained is a unit of gas or electricity your heating system doesn’t burn to compensate for what was passing through the glass.
Talk with our team today to learn more about how to reduce energy consumption.
Best windows for energy efficiency: your questions answered
What are the most energy-efficient windows available?
Triple glazed uPVC windows with low-E glass and argon gas fill are the best energy efficient windows currently available for most Scottish homes.
What is a U-value and what should I look for?
A U-value measures heat flow through the whole window. Lower is better. Building regulations in Scotland require 1.4 W/m²K or lower for replacement glazing. Our triple glazed units reach 0.8 W/m²K!
Is triple glazing better than double glazing for energy efficiency?
Yes. Triple glazed windows add a second sealed cavity and an extra pane, reducing heat transfer further than the best double glazing specification. The extra cavity makes the most difference in north-facing rooms, exposed aspects, and homes with large window areas where reducing heat loss is the primary concern.
Does the frame material affect energy efficiency?
Yes. The whole window U-value includes the frame, not just the glass. uPVC has naturally low thermal conductivity, and our multi-chambered frame profile reduces heat movement through the frame further.
Will new windows improve my EPC rating?
Yes. Replacing single glazed or old double glazed windows with A-rated energy efficient glazing can improve your EPC.
Is uPVC the best frame material for energy efficiency?
uPVC is an excellent frame material for energy efficiency. The material has naturally low thermal conductivity, so heat doesn’t transfer through the frame the way it does with higher-conductivity materials. Our multi-chambered Advanced 70+ profiles add insulating air chambers through the frame section, reducing heat transfer further.
uPVC also requires no painting or surface treatment. The frames maintain their performance and seal quality throughout the 15-year guarantee period with no gap or warping from moisture absorption, which keeps the window’s energy performance consistent year after year.
Are replacement windows worth it for energy efficiency?
Yes, particularly if your current windows are single glazed or early double glazed units from the 1990s. Replacement windows with A-rated WER and low-E glass deliver measurably lower heat loss and can cut your heating bills noticeably across a full winter.
Get a free quote for energy-efficient windows and doors
Ready to upgrade your home and living with energy efficient windows and doors? The Advanced Group is the team for you.
With a huge range of double and triple glazed products on the market, including sash windows, casement windows, bay windows, bow windows, tilt-and-turn windows, and more, you will be spoilt for choice on ways to reduce energy bills.
Come and see our range of double or triple glazing units for yourself!
Visit our Glasgow showroom, or request a free quote online. We’ll arrange a no-obligation home visit and discuss the double and triple glazing options suited to your property’s needs.
