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What is Double Glazing?

girl looking at double glazed windows

It’s quite simple: Two panes of glass are laid in a wood or plastic frame with an air or gas-filled space between them.

Although a double glazed window looks and functions no differently than a regular single glazed or single pane one, the key advantage is its insulating ability:

The air or gas between the panes of glass serves as an insulating layer that lets light through but also keeps heat in. By reducing heat loss, energy bills are lowered and a building’s overall energy efficiency is improved.

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How Double Glazing Works

A scientist examines a molecular model

The science behind this type of window is actually quite easy to understand: It depends on the fact that air or gas is a much poorer heat conductor than glass.

The layer of air or inert gas between the two glass panes of a double glazed window does not conduct heat very well, which means that much less heat will escape through a double glazed window in winter than would escape through a single-glazed window.

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Aluminium, uPVC or Wooden Double Glazing?

Open wooden double glazed window

Since it’s difficult to attach glass directly to the walls of your home, replacement windows or doors obviously need frames. The three most common choices for window or doorframes in the UK are aluminium, uPVC or wood.

If you are considering having replacement windows installed in your home, you might be wondering which option is best for you. Since each of these materials has its own advantages and disadvantages, there is no clear best choice.

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Double Glazing FAQ

Cold winter scene viewed through large double glazed windows

This is a primer all about the basics of double glazing – how it works, why to install it, how to buy it and the latest advances.

 

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All About Heat Loss – U Values Explained

Hot cup of coffee

It’s estimated that the average UK home loses about 20% of its heat through the windows. If your average heating bill comes to, say, £50 a month, chances are that about £10 is drifting out your windows! Winters can be a chilly business in this country, and with energy costs rising every year, it goes without saying that the better-insulated your home is the warmer (and richer) you’ll be.

While most of us discuss the temperature of our homes in words like ‘warm,’ ‘cold,’ ‘draughty,’ or ‘snug,’ experts rely on the term ‘u value’ to determine how much heat your home retains in colder seasons.

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Secondary Double Glazing

Historic window

Secondary double glazing, sometimes referred to as ‘secondary glazing’, simply means fitting panes of glass inside your existing single pane windows to achieve many of the same benefits as double glazing. The additional pane of glass has an insulating effect similar to that which double glazing provides, but at a much lower cost.

The greatest advantage of secondary glazing is its affordability. If you would like to lower your heating bills, reduce draughts and keep your home warmer in winter but don’t have the budget to install double glazing, secondary glazing may be the next best option.

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History and Development of Double Glazing

White cottage on windswept scottish shoreline

Although the exact history of double glazing is somewhat difficult to trace, it is commonly believed that the technology originated in Scotland in the Victorian era and made its way to the United States in the 1930s.

A century ago, heat energy was even more expensive in the UK than it is today.

Continue reading “History and Development of Double Glazing”…

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Basics

What is Double Glazing?

girl looking at double glazed windows

It’s quite simple: Two panes of glass are laid in a wood or plastic frame with an air or gas-filled space between them. Although a …

How Double Glazing Works

A scientist examines a molecular model

The science behind this type of window is actually quite easy to understand: It depends on the fact that air or gas is a much …

Aluminium, uPVC or Wooden Double Glazing?

Open wooden double glazed window

Since it’s difficult to attach glass directly to the walls of your home, replacement windows or doors obviously need frames. The three most common choices …

Features

Tilt & Turn Windows

Tilt and Turn Double Glazing

Tilt and turn frames offer an alternative to conventional casement ones. The design originates from Germany, and although they are well known throughout Europe, they …

Mind the Gap!

A section through a double glazed window showing two panes of glass with gap between them.

What you need to know about the gap. If you have decided to explore replacing the windows in your home, you will soon discover that …

Energy Efficient Glass

Picture of house with double glazing next to energy rating chart

Today more than ever, consumers are conscious of the need to conserve energy around the home. Energy costs are at an all-time high and will …

Buying

What is the Average Cost of Double Glazing?

The average cost of Double Glazing

Whether you are installing new windows or having the existing ones on your house replaced, it is useful to get an idea of what the …

How to Save Money and Get a Great Deal

Photo of piggy bank infront of double glazing

One very important reason for replacing your existing windows is to save money. Superior insulation and heat retention properties can dramatically reduce your energy bills. …

Double Glazing Sales Tactics

Pushy Double Glazing Salesman

The high-pressure sales tactics used by some representatives in the industry have gained quite a lot of negative publicity recently. While it is true that …

Legal

Double Glazing for Listed Buildings

Old listed building not suitable for uPVC Double Glazing

Renovating a listed building or a property in a conservation area can prove to be something of a headache. English Heritage maintains a raft of …

Your Legal Rights

Photo of black book with The Law written on it in gold

Choosing to upgrade the windows in your home is big investment and can be scary if you aren’t aware of the systems which are in …

How to Resolve Problems or Disputes

Businessmen arguing about double glazing

If you have a problem or dispute with the company who have installed your new windows, this article will help to detail what courses of …

Repairs

Condensation Inside Double Glazing

Condensation or ‘misting’ inside a double glazed window is a sure sign that the sealed unit has failed

Condensation or ‘misting’ inside a window is a sure sign that the sealed unit has failed. Somewhere, a point in the edge seal of the …

Broken Glass In A Double Glazed Window

Broken Glass

There are various reasons, sometimes a combination of which can cause the glass to crack or break. It is not just down to impact as …