We’ve installed thousands of windows over the last 34 years, take a look at what we have installed more recently.
Fitting Scotland Perfectly
New Windows Charlestown
Quality Energy Efficient Double Glazed Windows & Doors




Spotted a temperature drop in your house? Bills on the up? Or condensation forming on or inside your windows in the morning?
That familiar feeling? It’s your windows telling you something.
Older windows lose their seal over time.
The gas between the panes steadily escapes, the rubber gaskets stiffen and pull back, and what used to kept the cold out now scarcely holds it back.
Charlestown’s rain and wind can feel more common than the sun. Worn windows make a real difference to how warm and cosy your house feels.
But not to worry, The Advanced Group is here to assist with over 38 years of trusted service. Whether you want new windows for a single room or a full house of replacement windows and doors, we can guide you to the right solution and get everything fitted the right way.

Some problems are obvious, like cracked glass, rotten timber frames, and handles that won’t lock the right way.
Other symptoms, however, are harder to spot, and by the time you realise, they could have been losing you money for months or even years.

Spotting moisture or fogging between your two sheets of glass tells you the sealed unit has failed.
The seal goes, and with it leaks the argon gas that kept the insulation. The window loses a significant degree of its thermal ability.
Don’t waste money away with climbing heating bills and make sure to restore your home’s thermal efficiency with well sealed new windows.

Try holding your hand near the edges of your window on a windy day. If you can feel cold air getting through, the seals have deteriorated.
Draught proofing strips can help for a while, but they’re a sticking plaster on a fault that will only worsen as the rubber keeps on break down.

Windows that catch, jam, or won’t fasten properly are a safety risk as well as an insulation problem. Warped frames, worn hinges, and failed mechanisms all indicate the window has come to the end of its working life.
Multi-point locking systems far exceed the old single-point catches for security. Toughened glass gives extra protection.

A considerable amount of heat loss in any home comes from the windows. They act as the barrier between your living space and the outside weather.
Double glazing from the past is exactly that, in the past. The energy ratings fall significantly below modern offerings, even if the original spec was solid at the time.
Installing new double glazed windows and doors is one of the best ways to guard your property from high energy costs.

Charlestown homes vary across all forms, and the right window choice depends on your building, the room, and how you use it.
The Advanced Group provides and fits a full range of windows and doors in double glazed and triple glazed configurations, including uPVC casement, sash, tilt and turn, and top hung styles.

Possibly the most widely chosen window type in the UK, casement windows are side-hinged and open outwards, which makes them practical for ventilation and easy to clean from inside.
Perfect for most property kinds, from modern builds to traditional properties, casement windows are available in a wide range of colours and finishes, including woodgrain effects that mimic the appearance of timber without the maintenance or risk of warping.

Our sliding sash windows are designed to mirror the appearance of original wooden sash frames, while offering modern standards of thermal performance and protection.
The proportions, sight lines, and opening mechanism match the traditional design. That’s essential if your property is in a conservation area or you just want to keep its charm.

Tilt and turn windows tilt inward at the top for secure ventilation, and turn completely inward on a side hinge for straightforward cleaning.
Common in upper-floor flats. Cleaning the outside from a ladder? Not an option.
The tilt feature allows air in without the security risks of having the window fully open, which is especially useful if you’ve got young children.
Top hung windows are hinged at the top and open outward from the bottom. This makes them a smart choice for ventilation while working to keep rain out.
They’re often used in bathrooms, kitchens, stairwells, bay window setups, and other spaces where privacy and airflow are just as valued.

Think of them as full-length windows that open outward, exactly like French doors. That’s French windows for you.
They work well in pairs and can be combined with sidelights to cover a wide opening with glass and natural light.

uPVC frame materials. That’s what The Advanced Group focuses in, and the reasons are sound.
uPVC frame materials are particularly well suited to the unforgiving Scottish climate, delivering durability and resilience to harsh, windy, and wet weather. Unlike timber frames, uPVC won’t suffer from the same warping or rot problems.
uPVC is low maintenance too.
Just a simple wipe with soapy water and it looks as good as new!
Energy performance is where our uPVC windows really shine. Multi-chambered uPVC construction, U-values as low as 0.8 W/m2K on some frames, and a proper difference to the energy performance of your property.
And the better bit? uPVC double glazing is the most cost-effective option on the market.
So you can often fit higher-specification glazing and still stay within budget. We supply glazed uPVC doors too, including uPVC doors, composite doors, and patio doors to match.
For a good part of the year, Scotland’s climate is cold, wet, and windy.
In that weather, the energy rating of your windows makes a noticeable difference to how much you shell out on heating and how pleasant your property feels day to day.
U-value. That’s the measurement that reveals you how well-insulated a window truly is.
The lower that figure, the less heat escapes through your glass and frame. Scottish building regulations currently set a maximum U-value of 1.6 W/m2K for replacement windows.
Our standard double glazed windows reach 1.2 W/m2K, and our premium options can hit values as low as 0.8 W/m2K. That’s superior double glazing and triple glazing that works twice as well as the regulatory minimum.
The difference shows up on your energy bills.
A-rated windows and doors. Argon gas filled sealed units. Low-E glass coatings. Heat bounced back in, light still getting through.
If you’re coming from old single-glazed sash windows or early double glazing from the 1990s, you could see a genuinely significant drop in your heating costs within just the first winter!
While many double glazing companies in Charlestown provide standard products, few can compare with the standard of the windows and doors we supply.

Our trusted installers often get asked about our triple glazing products.
An extra pane of glass sets triple glazing apart. It delivers better insulation and better noise reduction compared to standard double glazing.
If your property is in an exposed location, at a high altitude, facing north, or near a busy road or flight path, The Advanced Group would be more than glad to guide you through the advantages of triple glazing.

We fully understand that new windows are an big purchase, and paying for them all at once isn’t always doable.
0% APR. Up to 4 years interest free credit. That’s what we offer.
The windows you deserve, with the cost spread in a way that suits for you. That’s what 0% finance allows.
Over 38 Years in the Business
1988. That’s when we first started installing double glazing across Scotland.
That’s 38 years of figuring out what performs best, building great relationships with partners, and training window fitters who truly take care in what they do. And honestly, our experience comes through on every single job.
Covered by a 15-Year Guarantee
Every window installation comes with a 15-year guarantee that covers both the product and the workmanship, which is genuinely comforting!
The reason our guarantee goes beyond that of our competitors is our total confidence in the quality of our windows and the expertise of our installers.
If anything happens, just ring us and we’ll put it right.

As Scotland’s top supplier of energy-efficient double glazing products, we present an outstanding range of styles, frames, colours, and finishes.
You are encouraged to visit our showroom, where we will be more than happy to personally talk you through our complete range.

Thinking about new windows or doors for your Charlestown house? The Advanced Group would be more than pleased to help.
We’ll arrange a home survey when it suits you. Size up. Talk through your options. Give a written quote. No obligation. No pressure.
Should you wish to view our selection of windows and doors in person before making a decision, you are invited to visit our showroom.
Contact our helpful team today for your free quote or home survey.
Get a Quote
It only takes 30 seconds!
By clicking ‘Send Now’ I consent to the Advanced Group’s data policy and allow them to contact me with the information provided above.












