SAVE BIG when you recycle your old Windows & Doors with us!

castle logo

Double Glazing Edinburgh

GreenCastle Home Improvements provides custom double-glazing services in Edinburgh with high-performance windows that cut heating bills, improve security, and reduce external noise.


reviews on

SAVE BIG when you recycle your old windows & doors with us.

Find out how much your old windows are worth when you enquire online today!

Finance Options

Same Day Quotes

Quality Assured

Price Promise

Get a quick and easy quote

How many Windows & Doors would you like to Replace?
What Material are your existing Windows?

Custom Double-Glazing Services in Edinburgh

Screenshot    at

Our huge range of double-glazed windows offers many different style options that can enhance the appearance of any home. 

We offer a made-to-measure, bespoke window installation service, so we can customise your windows to your specific requirements and design preferences.


Screenshot    at

Impressive Energy Efficiency

Brown door installed by Greencastle in Scotland

GreenCastle double glazing has a high energy-efficiency rating, so it prevents a great deal of heat loss. This means lower energy bills and a reduced carbon footprint.

Our double-glazed windows can reduce heat loss (or heat gain) nearly 30% more efficiently than a single-glazed aluminium window.

Brown door installed by Greencastle in Scotland

Improved Security

Double glazing in modern Dundee home

The glass in double glazing is thicker than that of single-glazed windows, and with two layers of it, this provides better security against a break-in. 

GreenCastle double-glazed windows also incorporate cutting-edge security measures such as the Yale window locking system.

Double glazing in modern Dundee home

How it works

At Greencastle Home Improvements, we have made it easier than over to transform your home in 4 quick and easy steps.


Enter Your Details


Talk To An Expert

istockphoto  x transformed

No obligation quote

Interior Window Installed by greencastle

Get installed

Are you ready to transform your home? Fill out our 60 second contact form today!

Less Condensation

UV protective double glazing in dundee home

Condensation is a common problem with single-pane windows. Over time it can cause not only structural damage but also result in growth of mould, which can trigger respiratory problems.

Insulating gas between the two panes of double glazing reduces condensation by up to 85%. 


UV protective double glazing in dundee home

Noise Reduction

Open double glazed window

With GreenCastle double-glazed windows, your home will be a lot quieter. These windows reduce exterior noise pollution by up to 65% – 31 decibels. 

The two panes of glass and the gas between them absorb sound vibrations, which inhibits transmission of sound.

Open double glazed window

Increased Property Value

UV protective double glazing in dundee home

Our custom double-glazing services in Edinburgh can help you increase your home’s resale value.

Our double-glazed windows are a good investment because they enhance kerb appeal and home interiors, which will appeal to homebuyers.

UV protective double glazing in dundee home

SAVE BIG when you recycle your old windows & doors with us.

Find out how much your old windows are worth when you enquire online today!

UV protective double glazing in dundee home

Glazing Options

UV protective double glazing in dundee home

Besides double glazing, we can also improve old single-glazed windows by adding secondary glazing.

This is a cheaper option so could be the solution if you want to upgrade your windows on a budget.

At the other end of the glazing scale, we offer triple-glazed windows with outstanding thermal insulation.

UV Protection

istockphoto  x  transformed

GreenCastle double-glazed windows provide protection from the harmful effects of ultraviolet light from the sun entering your home.

The UV screen in our windows blocks up to 99% of UV rays. This avoids potential issues such as skin damage and furniture discolouration.     

istockphoto  x  transformed

Benefits of GreenCastle UPVC Windows

UPVC windows are now the most common types of windows, chosen by householders because of their many advantages over traditional window frame materials.

GreenCastle has over 50 years worth of experience in providing homes across Scotland with quality windows. We offer a precision, made-to-measure uPVC window installation service in Edinburgh, with multiple customisation options.

Energy efficiency, durability and low-maintenance make our windows a cost-effective and long-lasting solution. With robust security features, this ensures top protection against break-ins.

Our uPVC windows also come with various style, design, colour, and hardware customisation options.

UPVC Window Installation Services in Edinburgh

UPVC window installation services in Edinburgh provided by GreenCastle Home Improvements make homes more secure, quieter, and energy efficient to help reduce your energy bills.

Our stylish high-performance, custom double-glazed uPVC windows also provide UV protection and reduce condensation in the home. 

With little maintenance required, your windows can last for decades and add value to your property..

flush casemet window installed in scotland home

Our Customer Services 

GreenCastle provides excellent customer service with a range of value-added features.

  • Free no-obligation consultation and quote.
  • Free window style-and-design package.
  • Ten-year guarantee on frames and glazing.
  • Lifetime guarantee on window locking system.
  • Financing options, including 12 months’ zero-interest credit.

Contact Us

If you’re looking for quality custom double-glazing services in Edinburgh, call us now on 01382 671023 or contact us online to arrange a free consultation and quote. 

Why Choose our Edinburgh Custom Double-Glazing Services?

flush casemet window installed in scotland home

GreenCastle Home Improvements’ bespoke, made-to-measure double-glazed windows can be customised to match any style of home and according to your individual design preferences.

Our A-rated energy-efficient uPVC double-glazed windows are precision crafted with advanced, innovative manufacturing techniques, and they’re installed by expert double-glazing fitters.

With 50 years’ experience as a trusted Scottish window company, we’ve earned a solid reputation for quality double-glazing backed by a high standard of customer service.

Double-Glazing Edinburgh - FAQs

Most frequent questions and answers

As long as your property isn’t a listed building or in a conservation area, you generally don’t need planning permission for double-glazed windows. 

The City of Edinburgh Council says that if you’re installing double glazing in a listed building, you’ll typically require listed-building consent. 

You’ll also need planning permission if windows would alter the external appearance of a building in a conservation area – replacing wood window frames with uPVC, or changing the original design, for instance.

The lifespan of double-glazed windows depends on factors such as the quality of the installation and materials, and how well the windows are maintained.

Double glazing on average lasts around 20 years. Your windows will last longer if your property is in a sheltered location that doesn’t expose them to extreme weather.

Some double-glazed windows may last 50 years.

Regular cleaning and maintenance can make your double-glazed windows last longer. 

Clean the glass and uPVC frames and sills with a soft cloth or sponge and a mild detergent. This will remove dirt without scratching the surfaces. 

Don’t use a high-pressure hose to clean your window exteriors. This can damage the seals and cause leakage. 

Window maintenance includes checking the condition of locks and seals frequently and ensuring any necessary repairs are done promptly.

Whether you need to replace a double-glazed window or have it repaired depends on what’s causing the problem.

If the integrity of the sealed unit has become compromised, you’ll usually need a full window replacement. 

If the problem is less serious, such as small cracks in the frame or damaged hardware, these issues can often be repaired. 

The price of double-glazed windows varies depending on the size of the window, quality of materials, level of customisation, and whether preparatory structural work like opening up a wall is needed.

You can get a free, no-obligation quote from GreenCastle Home Improvements for our custom double-glazing services in Edinburgh.

casement box bay window installed in scotland

Casement Windows

Single or double-panelled windows, these are hinged from the side, top or bottom. Available in uPVC, timber or aluminium, and in a range of different colours, they can be customised with options including decorative glass, clip-on Georgian bars, and different finishes. Our casement windows offer the latest high performance technology when it comes to security. Highly energy efficient, our casement windows are A+ rated for maximum thermal efficiency.

Available in a range of colours.

sash windows installed in bedroom

Sash Windows

Providing effortless use with smooth sliding mechanisms, sliding sash windows have the appearance of timber but the functionality of UPVC.  Available  in a range of styles, including Georgian, Victorian and Edwardian, our sash windows are long-lasting and relatively maintenance-free.

Available in a range of colours.

shaped windows installed to brighten scotland home

Shaped Windows

Non-standard shaped windows provide unique design appeal to a property. These types of windows, including arch and circle shapes, can boost light coming into a property.

Available in a range of colours.

tilt turn windows installed in open room

Tilt & Turn Windows

Tilt & turn windows are highly versatile and easy to use. A perfect option for homes with young children, their tilt and turn functionality means you can conveniently ventilate your home without any risk to safety.

Available in a range of colours.

Bay window installed in scotland home

Bay Windows

Forming a bay on the edge of a room, these type of windows give your room a spacious feel. Their design allows lots of natural light  into your space and are an attractive addition to a home when viewed from the outside.

Available in a range of colours.

flush casemet window installed in scotland home

Flush Windows

A blend of classic style with modern hardware, flush windows are the perfect option for both heritage and modern properties. Their thermal efficiency and noise reduce capabilities make them a great addition, and they can be custom-made for your home.

Available in a range of colours.

scotland cottage installed with scottish style windows

Cottage Windows

Our cottage windows help retain authentic old-style charm for period properties or can even  add a vintage touch to new build properties. With a traditional design, they often feature multiple small panes and cross-bars.

Available in a range of colours.

Coloured window installed in office scotland building

Coloured Windows

Choose windows frames in colours that perfectly match your own aesthetic requirements. Ensure they match your home and stand out for the right reasons.

Available in a range of colours.

Secondary glazing installed in Scotland home

Secondary Glazing

As an alternative to standard double glazing, secondary glazing is slim additional window inside the existing one and improves thermal insulation and noise reduction.

Available in a range of colours.