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A guide to energy efficient windows and doors
Lots of people talk about having energy efficient homes and making sure they waste the least energy possible… but with so many options available, many are left wondering what their next steps should be.
This guide runs through the reasons that upgrading to more efficient glazing can save money and improve comfort levels, as well as the cost savings that you can make and the best ways to choose the right suppliers and fitters.
What are energy efficient windows, doors and conservatories?
An energy efficient window, door, or conservatory is one that minimises wasted heat by insulating properties. The great news is that this can be done without negatively impacting the appearance whatsoever. In fact, in many cases, it can enhance the look and value of homes.
What determines the energy efficiency of a window or glazing?
The energy performance of glazing is dependent on how well the materials prevent heat from passing through, as well as how much air is able to leak in around the window and how much sunlight is able to pass through. This is all taken into account in the energy rating of products.
Why are energy efficient windows and doors important?
Energy efficient windows and doors can be simple installations, changing inefficient, outdated versions out for new ones that reduce energy bills and lower your carbon footprint.
Top reasons to install energy efficient windows and doors include:
- Reducing energy consumption
- Saving money on bills
- Stopping draughts
- Improving home security
- Removing condensation and damp

How to make homes more energy efficient
The best way to make a home more energy efficient is to identify the key areas that you may be losing heat and addressing this. Typically, this is from windows, doors and conservatories that are no longer insulating the home as much as they should be.
From here, the process is relatively simple, noting any areas of glazing that you think could make your home more energy efficient and speaking to experts that are able to advise you on the best options.
At CRK Windows, we are always happy to help, so you can call us on 01442 244200 to ask any questions you may have, with completely no obligation.
Benefits of energy efficient windows, doors and conservatories
Benefits of prioritising energy efficiency in your windows, doors and conservatories include:
Increased comfort
Energy efficient glazing can help to keep homes at a comfortable temperature all year round, with less draughts.
Less condensation
Many people have an ongoing issue where condensation builds up around, or inside windows. If you are experiencing condensation forming inside your glazing units, this is a sign that they are no longer performing as they should and require replacing. By having energy efficient windows, you can save time and effort drying condensation, while keeping damp out of the home more effectively.
Reduced noise pollution
As well as keeping the heat in, glazing can also help to keep the sound out. Whether you live on a busy road, or just want to hear less of the outside world, this is a major benefit to investing in energy efficient glazing.
Cost savings
Last, but certainly not least, installing more energy efficient windows, doors, or any other type of glazing, can bring cost savings. This is done by reducing energy wastage and therefore requiring you to pay less to keep your home at a comfortable temperature.
How much money can you save?
The amount of money you can save by installing more energy efficient glazing depends on various factors, including the windows you choose, how well they are fitted, the position of windows and the number of windows you replace.
As a guide, installing A-rated double glazed windows in a semi-detached, gas heated property, will save around £155 per year, as well as 375kg of carbon dioxide, in comparison to a single-glazed home.
Similarly, A++ rated double glazing could save up to £170 per year, as well as 410kg of carbon dioxide.
Typically, the more energy efficient a window is, the higher the cost to manufacture, however this also comes with increased energy cost savings every year.
Choosing efficient glazing
There are many options available for glazing, with different ratings ranging in price and efficiency. It’s important to speak with your chosen supplier about the choices they have available to you and seeing how these align with your budget.
Choosing the right supplier
Another key consideration is making sure you choose a reputable supplier that you can trust to deliver on their promises.
Looking at reviews is a great place to start when choosing a supplier, manufacturer, or fitter, as this will show you others’ experiences. Similarly, it’s important to choose somebody with great products, communication, expertise and reasonable prices.

Efficient glazing designed for you
At CRK Windows, we manufacture in-house, meaning we can tailor the design to your exact specifications. We are proud to offer options that prioritise good looks and efficiency at the same time. In fact, our entire range of products has been designed to combine aesthetics with flawless performance.
Energy Saving PVCu windows
Our Energy Saving Plus PVCu windows are strong, versatile, secure, durable and practically maintenance-free. Whether you want windows to blend in with the style of your home, or make a statement, CRK Windows can design, manufacture and install the perfect option for you, giving you peace of mind with a 10-year insurance-backed guarantee.
Read more about our energy efficient windows here.
Improve the energy efficiency of your home today
To get started and begin making your home more energy efficient, call the CRK Windows team on 01442 244200 to speak with one of our friendly team, or alternatively, you can visit our showroom at 38 Mark Road, Hemel Hempstead, HP2 7BW to view some of our options in person.