CALL NOW ON 0800 158 8055

Double Glazing

  • A energy rating
  • Increased window security
  • Reduced outside noise
  • Less risk of condensation
  • Increased home value
  • Flexible finance available
Request a Quote

0% Deposit

Buy Now Pay Later

Flexible payments available. 7.9% APR Representative.

Double Glazing Suppliers You Can Trust

We specialise in providing the very best in double glazing and uPVC windows, tailored to your requirements.  Our double-glazed windows are manufactured to the highest standard and individually crafted to your requirements. This personal service means you get the perfect windows to suit your home and your lifestyle, whether you’re looking for replacement windows or building a new home. Unlike many other double glazing companies, all our windows and double glazing products are manufactured in the UK.

We cover the Midlands and Northern Ireland. With headquarters in Derby as well as offices in Leicester and Belfast, we are ideally situated for all of your home improvements needs. All our double-glazed windows are available in a choice of colours and styles. Whatever type of window frames you’re looking for, there’s sure to be one to suit. Why not arrange a design consultation with you to discuss your options. Now’s the time to transform your home.

Request a free, no obligation quote

Double Glazed Windows


If you’re looking for new double glazed windows, the choice is important. We offer a fantastic range of different window styles to choose from, from flush casement windows to tilt and turn windows. Whatever your property, you’ll find a style to suit. We can even work with older, listed and period properties. If you prefer the look of wooden windows, choose from our range of timber windows rather than modern uPVC. Our flush sash windows in particular offer a traditional appearance, with all the benefits of modern technology.

Your home’s security is always top of our minds. That’s why all our double-glazing windows have unique 14-point locking systems, approved by the Secured by Design initiative. Not only that, but they’re energy-efficient, so you’ll save money on those bills! We’re members of the Guild of Master Craftsmen, and FENSA-approved. All our products come with a 10-year guarantee from the Plastics Window Federation for complete peace of mind.

Double glazing vs single glazing

Double glazed windows are far better than their single glazed counterpart in every aspect. A double glazed unit has two panes of glass instead of one, which leaves a pocket of argon gas between them both. The secondary glazing improves heat retention and noise reduction. Single glazed windows easily allow heat to escape as there’s no argon gas to stop it, which causes your house to be colder. A single glazed window is also more prone to cracking or shattering as there’s not an extra pane of glass to strengthen the window.

Single glazed windows are also more prone to condensation, which can eventually lead to more serious issues for your house and health. In a modern world, there is no place for single glazing as it’s outdated in every way. You might argue that they’re cheaper than double glazed windows, but regular windows won’t save you money on your energy bills or add value to your home. If you have the choice, you should always opt for double glazing!

Is It Worth Replacing Old Double Glazing?

Sash windows

Yes, absolutely! If you’re worried about replacement windows cost, rest assured that replacing old double glazed units is well worth it. Old windows can become ineffective over time, and modern technology is helping to make double glazed windows better than ever. Your existing windows might be more dated than you realise.

There are many benefits to replacing old double glazed windows and doors. Window materials like low e glass help make your new windows more thermally efficient. The increased energy efficiency will reduce heat loss, lowering your heating bills and saving you money in the long run. As well as improving heat retention, having your windows replaced can also reduce external noise, giving you a quieter home. Toughened glass offers great security benefits too.

What’s more, you can increase your property value by replacing windows. New double glazed windows are desirable to potential buyers and so is a good energy rating. Upgrading your double glazing is a great investment!

Double Glazing Prices

Why not invest in your home with replacement double glazing? With a range of flexible finance options available, new a-rated windows could be more affordable than you think. Whilst we focus on high-quality and great service, we offer value for money too.

To get an instant double glazing cost, get a free quote today!

Request a quote

Help, Tips & Advice

Is triple glazing worth it? Find out if triple glazed windows will be beneficial for your home.

Do You Really Need Triple Glazed Windows?

Is condensation on double glazing normal, and how can you reduce it?

Dealing with Condensation on Double Glazing

Our Locations: Double Glazing Specialists in Derby, Leicester & Belfast

We’re renowned Derby double glazing suppliers with our head office located in Allenton, around 3 miles south of the city centre.

Derby Double Glazing Suppliers

We cover your Leicester double glazing needs from our local office on Friar Lane.

Leicester Double Glazing

For double glazing in Belfast, our Northern Ireland experts are on hand.

Belfast Double Glazing

Read these reviews and more on our Derby Google reviews page, our Northern Ireland Google reviews page and our Thomson Local logo page.

Our Accreditations

When you buy an Emerald product you can rest assured that you are in the safest of hands. We are a member of FENSA, Trust Mark, The Guild of Master Craftsmen, the PWF (Plastics Window Federation) and many more. Being part of these initiatives ensures that Emerald operate to the strictest industry standards and that no corners are cut.

Guild of Master Craftsmen
Plastics Window Federation
Secured By Design
Trust Mark

Download Our Latest Brochure

Get Quote