Top 7 Benefits of Double Glazed Windows

Double glazed windows consist of two layers of glass, separated by a space that is either left as a vacuum or filled with an inert gas. This design helps reduce heat loss and block out noise.

Double Glazing

Sample of modern window profile on sill. Space for text

Double glazed windows are harder to smash, more energy-efficient, and better at excluding noise than single glazed windows. Find out more about the benefits of double glazing below:


It is important to know that your property is safe. Double glazed windows are tougher to smash and more challenging to break than single glazed windows. Double glazed windows are also more difficult to force open from the outside, making it harder for burglars to break-in.


Double glazed windows insulate your home more efficiently than single glazed windows: with an additional pane of glass, they don’t let as much heat escape. This makes double glazed windows great for keeping your home warm in winter.  There are also double glazing benefits for the warmer seasons, as the additional pane of glass helps prevent outside heat from protruding into your home.

Energy efficiency

Double glazed windows are more energy-efficient than single glazed windows; they provide more insulation, which reduces the amount of energy needed to heat or cool a room in your home. As a result, you won’t need to turn on the heating as often during winter and won’t use as much air conditioning during summer.

Ultimately, double glazed windows will lower your energy bills and save you money.


Double glazed windows are advisable if you live by a busy road or in a noisy area. When noise hits single glazed windows, the pane vibrates. This promotes the air on the other side of your window to vibrate, passing the sound to the ears. With double glazing, the extra sheet of glass added reduces the amount of vibration, which reduces noise.

Although double glazed windows will never be completely soundproof, they can reduce sound levels by up to 31 decibels.


If you look at your window and see water droplets, the air inside your home is warmer than the windows, which causes condensation on the window panes. When condensation builds up, window panes become mouldy. Humidity can also lead to rotting wooden window frames.

Double glazed windows reduce moisture build-up on your window panes as the airtight seal fends off the development of condensation; this reduces the risk of mouldy windows and helps avoid costly repairs to fix the damaged windows.

Aesthetically pleasing

You don’t have to compromise insulation for aesthetics. Regardless of your house’s style, whether it has a traditional or modern exterior, double glazed windows can fit all architectural profiles whilst keeping the character of your home intact.

Increased property value

Double glazed windows can add value to your property. On average, research has shown that the value of a home increases by 10% with new double glazed windows; buyers will be more inclined to buy a property with newer windows, so they don’t have to replace them.

At Britannia Glass, we specialise in double glazing repairs. If your window is damaged, we will repair it at a fraction of the cost of replacement windows. If your window is beyond repair, we will quickly install a new one.

Are you looking to get your double glazed window repaired or replaced? Get a Quotation Today here, or if your enquiry is urgent, please telephone us on 0203 305 7161.