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

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Quality Double-Glazed Windows in Aberdeen

Greencastle Home Improvements supplies and installs double-glazed windows in Aberdeen.

We offer a range of made-to-measure design and customisation options so you’re sure to find the right double glazing option to suit your home and budget.


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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!

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Why Choose GreenCastle?

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Greencastle Home Improvements is a leading Scottish window company that has 50 years experience in serving customers in Aberdeen and surrounding areas. We have a long-established reputation for integrity, professionalism, and competitive pricing. 

Our double glazing windows are technologically advanced, combining visual appeal with optimal functionality. They’re crafted to the highest standards and installed by specialist technicians. 

Reach our Aberdeen team directly on 0122 4600 274

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How it works

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


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

Insulation and Energy Efficiency

Brown door installed by Greencastle in Scotland

Homes in Aberdeen with single glazing or old inefficient double glazing lose a lot of heat through their windows. With a high energy-efficiency rating, Greencastle windows prevent this problem by improving thermal efficiency. 

The two panes of glass (or three if you opt for triple-glazing) and an insulating barrier of gas between the glazing mean that more heat stays inside your home instead of escaping outside. This reduces energy costs because you can keep your home warm and comfortable without having to crank up the heating too much.

Brown door installed by Greencastle in Scotland

Less Noise

Double glazing in modern Dundee home

When you install double glazing windows, you’ll soon notice how much quieter your home is. The windows significantly reduce external noise pollution – crucial if you have noisy neighbours or live near a busy road.

The double glazing absorbs sound vibrations and sound also struggles to pass through the uPVC frames. This means double-glazed uPVC windows can reduce noise inside your home by 65 percent or more.

Double glazing in modern Dundee home
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Strong Security

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Double glazing provides an important home security measure to help keep out intruders and make sure your family and belongings are safe. Unlike standard single-glazed windows, double glazing is difficult to break through without using noisy power tools – the last thing burglars want to do.

Greencastle windows come with steel-reinforced uPVC frames as standard, and these also make forced entry more difficult. As a further security measure, our windows have Yale multi-point locking systems.

Secondary glazing installed in Scotland home

Increased Home Value

Secondary glazing installed in Scotland home

Installing double glazing can be a smart investment in your home, especially if you decide to sell up at some point.

By increasing the market appeal and resale value of your property, double glazing gives you a better chance of selling your home at a much better price. It’s estimated that replacing single glazing with double glazing can increase a home’s value by up to 10%.

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UV Protection

sash windows installed in bedroom

Despite generally low summer temperatures, the Granite City still gets a lot of sun – more than 1,450 hours of sunshine in a typical year. This can cause problems as UV (ultraviolet) rays penetrate into homes through windows. These issues include premature ageing of skin and damage to home furnishings and fabrics.

With built-in UV screening, double glazing windows in Aberdeen stop up to 99% of ultraviolet rays getting into homes. 

Less Condensation

Reducing noise with double glazing

Condensation is a common issue in homes with single-glazed windows. It can result in mould growing on damp patches on walls and ceilings, and this can lead to respiratory illnesses. Over time, condensation can also cause structural damage.

The insulating gas between the two panes of double glazing dramatically reduces condensation and its associated risks – by up to 85%.

Reducing noise with double glazing

Easy Maintenance

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Taking care of your windows will be a breeze. Unlike timber window frames, uPVC doesn’t require periodic maintenance such as repainting and varnishing. You simply wipe the frames and window panes down from time to time using water and a mild detergent.

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UV protective double glazing in dundee home

Unlike some other types of double-glazed windows, GreenCastle windows are made in the UK, specifically designed to withstand our unpredictable climate. With minimal maintenance, you can expect your windows to last 20 years or longer, resisting weather-related damage despite cold, heat, rain, wind, and snow.

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!

Double-Glazing Window Styles

Double-glazed windows in Aberdeen installed by GreenCastle come in a wide range of customisable styles. These design options include:

  • Casement windows – a classic style and one of the most affordable types of windows.
  • Flush windows – elegant and sleek with a traditional aesthetic appeal.
  • Cottage windows – with a rustic charm that enhances modern homes as well as older properties.
  • Sash windows – for the elegant charm of traditional timber windows.
  • Bay windows – creating an architectural focal point.
  • Shaped windows – non-standard window designs that make homes stand out.
  • Reversible windows – easy to clean and provide good ventilation.
  • Tilt-and-turn windows – for additional child safety. 

Window Frame Colour Options

GreenCastle offers a wide choice of uPVC window frame colours, from contemporary and bold to more sophisticated shades and wood grain effects. This allows you to make a style statement that personalises your home.

Besides the standard white, your options range from tones of cream, green, blue, and red, to black, grey, and brown.

If you want interior window frames in one colour and exterior frames in a different shade, that’s no problem.

Window Hardware

GreenCastle double-glazed windows in Aberdeen have quality hardware that completes the look of the windows and helps with security and energy efficiency.

Our window hardware – such as locks, handles, and hinges – is tested to rigorous technical standards to ensure high functionality and smooth operation.

Benefits of GreenCastle Double Glazing

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Our Aberdeen double-glazing services give homeowners multiple benefits, such as: 

  • Multiple window customisation options.
  • Precision, made-to-measure installation.
  • 10-year guarantee on frames and glazing.
  • Lifetime guarantee on window locking system.
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double casement window with top light

Value-Added Services

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Our double-glazing installation service comes with a range of value-added features, including:

  • Free no-obligation consultation and quote.
  • Free window style-and-design service.
  • Financing options, including 12 months’ zero-interest credit.
  • Saving you money when you recycle your old windows with us.


Call us now on 01382 671023 or contact us online to schedule your free consultation and quote.

Double Glazed Windows FAQs

Most frequent questions and answers about double glazing in Aberdeen

You generally don’t need planning permission for double-glazing installation. However, Aberdeen City Council says that if you’re installing double glazing in a listed building or in a conservation area you’ll typically require listed-building consent or planning permission, respectively.

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

On average, they last 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 may last as long as 50 years.

Regular cleaning and maintenance can make your 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 today!

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.

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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.

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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.