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About Us

AboutDoubleGlazing.co.uk is owned and run by Excelsior Information Systems Ltd, a UK based Internet publishing company established in 1991.

Our Mission is to create the best double glazing website in the UK.

If you’re thinking about buying double glazing, it makes sense to do some research on the Internet before you buy. Informed consumers make better decisions, and get better deals.

But once you start researching double glazing on the web, you’re likely to discover, as we did, that there are very few sites giving high quality information and independent advice on the subject.

Most sites belong to double glazing manufacturers and installers, or trade bodies with an agenda to promote one sector of the market – eg uPVC or wooden double glazing.

So we set out to create an independent source of information for the double glazing buyer – and AboutDoubleGlazing.co.uk is the result.

Because we are a publishing company rather than a double glazing company, we have no agenda, or bias, and we can give you an honest overview of the whole market, with no hidden agendas, and no strings attached.

We’ve spent many months, and invested thousands of pounds in commissioning extensive, original research into the UK Double Glazing market, to enable us to bring you detailed, independent information to help inform your buying decisions.

Before buying, it helps to know about how double glazing works, and the different features and types available, and the advantages and disadvantages of each. It would also help to understand U Values, and the impact of energy efficient glass. Is self-cleaning glass a worthwhile investment, or an expensive gimmick?

We’ll also inform you about everything from how to deal with pushy salesmen, whether you need planning permission, and what building regulations you need to comply with. We also have detailed articles about the financial aspects of buying double glazing, as well as your legal rights when something goes wrong.

So before you jump into the (sometimes shark-infested) waters of the UK Double Glazing market, prepare yourself by reading the articles on this site. Become an informed consumer, you’ll be well prepared to make the best choice, and to get the best deal on your Double Glazing.

We hope you enjoy AboutDoubleGlazing.co.uk, and find it useful. If you have any comments or suggestions, please don’t hesitate to contact us.




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 …


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 …


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 …


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 …


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 …