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Expert Double Glazing Advice

How to Check Efficiency of Double Glazing

How to check efficiency of double glazing

How to Check for Inefficient Windows

Wondering how to check efficiency of double glazing? Double glazing windows have become increasingly popular due to their energy efficiency benefits. They are designed to reduce heat loss, improve insulation, and lower energy bills. 

However, not all double glazed windows are created equal, and it’s important to know how to check their efficiency. 

At Phair Windows & Glass, a window and door company, we install energy-efficient windows for homeowners across Leicester and Leicestershire. If you’re thinking about having your old windows replaced, get in touch with our specialists for a free quote.

In this blog, we will explore the key indicators of effective double glazing and provide you with practical tips on how to test your windows for efficiency.

What is Double Glazing?

Before we dive into the details of checking double glazing efficiency, let’s take a closer look at what double glazing actually is. 

Double glazing windows consist of two panes of glass with a gap in between, which is often filled with air or argon gas. This air or gas acts as insulation, reducing heat loss and improving energy efficiency.

The glass panes of double glazing windows are typically made of high-quality glass, which enhances the overall efficiency of the windows. 

The frame materials of double glazing windows can vary, with options like timber, aluminium, uPVC windows. Each material has its own advantages, such as good insulation, durability, or energy efficiency.

The Role of Energy Efficiency in Double Glazing

Energy efficiency plays a crucial role in double glazing windows, as it directly impacts heat loss, energy bills, and overall environmental impact. Let’s explore the importance of energy efficiency in double glazing windows in more detail.

Double glazing windows are designed to reduce heat loss, which means they help to retain heat inside your home during cold weather conditions. This, in turn, lowers your energy costs, as your heating system doesn’t have to work as hard to maintain a comfortable temperature.

In addition, energy efficiency in double glazing windows is important for the environment. By reducing heat loss, energy consumption, and carbon emissions, energy-efficient double glazing windows contribute to overall sustainability and help combat climate change.

When purchasing double glazing windows, it’s important to consider their energy efficiency rating. Look for windows with high energy ratings, such as those certified by the British Fenestration Rating Council (BFRC). These windows are more efficient and will provide better insulation, resulting in further energy savings.

Benefits of energy efficient windows in a home

Indicators of an Efficient Double Glazing System

Now that we understand the importance of energy efficiency in double glazing windows, let’s explore the key indicators of an efficient double glazing system. These indicators will help you assess the efficiency of your windows and determine if they are performing optimally.

Glass Quality

The quality of glass used in double glazing windows is a crucial factor in their efficiency. High-quality glass panes, such as low emissivity glass, enhance energy efficiency by reducing heat gain or loss.

Opt for double glazing windows with glass that has good insulation properties, such as low iron glass, which improves clarity and insulation. The thickness of glass panes also affects energy efficiency, with thicker glass providing better insulation.

Gaps between the Glass

The gaps between the glass panes in double glazing windows also impact their efficiency. Optimal gaps, filled with argon gas, enhance insulation and reduce heat loss. The width of the air gap is an important factor, with wider air gaps providing better insulation.

Properly sealed gaps are crucial to prevent moisture, condensation, and heat loss in double glazing windows. Check your windows for any signs of condensation or moisture buildup, as this may indicate a broken seal and decreased efficiency.

Frame Materials

The frame materials of double glazing windows play a role in their overall efficiency. uPVC frames offer good insulation, durability, and energy efficiency, making them a popular choice. 

Aluminium windows, on the other hand, are lightweight, durable, and energy efficient. Timber frames provide good insulation but require maintenance to ensure their efficiency over time.

Some double glazing windows feature composite frames, which combine the best qualities of different frame materials to achieve energy efficiency. 

Consider your specific needs and preferences when choosing the frame material for your double glazing windows.

How to Test Your Double Glazing for Efficiency

Now that we have explored the indicators of efficient double glazing, let’s move on to practical tips on how to test your property’s windows for efficiency. 

These tests will help you assess the overall efficiency of your double glazing windows and identify any potential issues.

Checking for Heat Loss

One of the easiest ways to test your double glazing windows for heat loss is by using a flashlight. On a cold day, turn off all lights in the room and shine a flashlight on the window glass from the outside. If you can see the light through the window, it may indicate heat loss.

Another way to check for heat loss is by placing your hand near the edges of your double glazing windows. Feel for cold air coming through, as this can be a sign of heat loss. You can also look for condensation or moisture buildup, as this may indicate heat loss in your windows.

Monitor your energy bills for any sudden increases, as this could suggest heat loss in your double glazing windows. If your heating bills are higher than usual, it may be worth investigating the efficiency of your windows.

Will new double glazed windows save energy

Assessing the Seal Quality

The quality of seals around your double glazing windows is important for maintaining efficiency. Look for condensation on the inside of the window, as this could indicate a broken seal and reduced efficiency.

Check for any draughts or air leaks around the window frame, as these can impact the overall efficiency of your windows. Use an infrared thermometer to measure the temperature of the glass on a cold day. Significant differences in temperature between different areas of the glass may indicate lower efficiency.

What if Your Double Glazing is Not Efficient?

If your double glazing windows are inefficient, there are several steps you can take to improve the overall impact of their efficiency. In some cases, you may need to consider replacing your windows, especially if they are old, damaged, or poorly fitted.

However, there are also options to enhance the efficiency of your existing double glazing windows. Adding window film or insulated curtains can provide an extra insulation layer, reducing heat loss and improving efficiency. 

Consult a professional double glazing installer or window specialist such as Phair Windows & Glass in Leicester for further advice on improving the energy efficiency of your home.

Summary of How to Check Efficiency of Double Glazing

To ensure that your double glazing is efficient, it’s important to consider factors such as glass quality, gaps between the glass, and frame materials. 

Efficient double glazing not only helps reduce energy consumption and lower heating costs but also improves the comfort of your home by reducing draughts and noise transmission. 

By investing in energy-efficient replacement windows, you’ll not only reap the benefits of lower energy bills but also contribute to a greener environment.

 Phair Windows & Glass offers industry-leading energy-efficiency products at unbeatable prices, combined with excellent customer service. Contact our team for a free quote on your new windows today.

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