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 Dumbarton
Quality Energy Efficient Double Glazed Windows & Doors




Maybe you’ve picked up on a change in temperature around your home. Heating costs rising. Or condensation collecting on or inside your windows each morning.
That familiar feeling? It’s your windows letting you something.
As windows get older, they gradually lose their seal.
The gas between the panes escapes out, the rubber gaskets go hard and contract, and what once kept the cold now barely slows it down.
In a place like Dumbarton, where rain and wind are sometimes more frequent than sunshine, worn windows have a real impact on how warm and cosy your home feels.
But there’s no need to worry, The Advanced Group is here to lend a hand with more than 38 years of trusted know-how. Whether it’s new windows for a single room or a full house of replacement windows and doors, we’ll help you find the right option and have everything installed correctly.

Some problems are hard to miss. Cracked glass, rotten timber frames, handles that won’t fasten the way they should.
Some signs sneak under the radar though, and by the time you pick up on them, they’ve been silently losing you money for months or even years.

If you notice moisture or fogging between the two sheets of glass, this is a clear sign that the sealed unit has broken down.
Once the seal has broken, the argon gas that provides insulation seeps away, and the window loses a considerable portion of its thermal efficiency.
Don’t throw money away with climbing heating prices and make sure to recover your home’s thermal performance with properly sealed new windows.

A windy day reveals you a lot. Hold your hand near the edges of the window. Cold air coming through tells you the seals have worn away.
Draught proofing strips? They’re a temporary fix. The issue only deteriorates as the rubber keeps break down.

Windows that catch, won’t lock right, or refuse to budge are both a security risk and an insulation issue. Warped frames, worn hinges, failed mechanisms. The window has come to the end of its functional life.
Modern windows have multi-point locking systems that are far more safe than the single-point catches on older frames. Options like toughened glass give additional protection too.
Windows contribute to a large share of heat loss in any property. They are the bridge between you and the outside weather.
Your old double glazing? It’s had its day! The energy ratings are well below what’s on offer today, even if the original specification was solid when first installed.
High energy costs don’t have to be the default. New double glazed windows and doors help protect your house and bring those bills down.

Dumbarton properties vary across all styles and types, and the right window style depends on your property, the room, and how you occupy it.
The Advanced Group delivers a full range of windows and doors in both double glazed and triple glazed specifications, including uPVC casement, sash, tilt and turn, and top hung designs.

The most widely fitted window type in the UK. Side-hinged, opening outwards. Ideal for ventilation and easy to clean from inside.
Casement windows work with most property styles, from modern houses to traditional villas, and are offered in a wide range of colours and finishes, including woodgrain effects that replicate the look of timber without the maintenance and fear of warping.

The traditional look of wooden sash frames, recreated in every detail. That’s what our sliding sash windows deliver, along with modern thermal performance and protection.
Every proportion, sight line, and opening mechanism follows the traditional design. Whether your property sits in a conservation area or you simply want to hold onto its personality, these windows do the job.

Tilt and turn windows tilt inward at the top for safe ventilation, and turn completely inward on a side hinge for simple cleaning.
They’re particularly well-liked in upper-floor flats, where getting up a ladder to clean the outside of the glass is not practical.
The tilt function provides you airflow without the safety risks of a fully open window, which is particularly helpful for families with young children.
Top hung windows are hinged at the top and open outward from the bottom, making them a practical choice for ventilation while helping to keep rain out.
They’re often installed in bathrooms, kitchens, stairwells, bay window arrangements, and other spaces where privacy and airflow are equally needed.

French windows work just like French doors but are full-length windows that open outward.
Ideal in pairs. Combine them with sidelights to open up a wide opening with glass and natural light.
The Advanced Group’s speciality is uPVC frame materials, and this choice is backed by good reasons.
uPVC frame materials are particularly well suited to the harsh Scottish weather, offering durability and resistance to harsh, windy, and wet weather. Unlike timber frames, uPVC won’t have the same warping or rot issues.
And here’s another bonus: uPVC is incredibly low maintenance!
Soapy water and a wipe. That’s all it needs to get uPVC looking as good as new.
Perhaps most importantly, our uPVC windows provide high levels of energy performance. Built with multi-chambered uPVC, some of our frames achieve a U-value as low as 0.8 W/m2K, helping to recover energy efficiency throughout your home.
And the better part? uPVC double glazing is also the most cost-effective option out there.
So you can often choose premium-grade glazing and still stay within budget. We also stock glazed uPVC doors too, including uPVC doors, composite doors, and patio doors to match.
Scotland is cold, wet, and windy for a significant chunk of the year.
With weather like that, the energy rating of your windows makes a noticeable difference to what you spend on heating and how warm your house feels day to day!
The thermal performance of any window is measured by its U-value.
Lower number, less heat getting out. Scottish building regulations currently demand a maximum of 1.6 W/m2K for replacement windows.
Standard double glazed windows: 1.2 W/m2K. Premium range: as low as 0.8 W/m2K. That’s twice as good as the regulatory minimum.
That performance gain is visually shown 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 upgrading from old single-glazed sash windows or 1990s double glazing, you could spot a significant drop in your heating costs within the first winter.
While many double glazing firms in Dumbarton offer basic products, few can match the calibre of the windows and doors we install.

We get asked about triple glazing a lot.
Triple glazing includes an extra pane of glass, which delivers enhanced insulation and noticeably improved noise reduction.
If your property is in an exposed position, at a greater altitude, facing north, or near a busy road or flight path, The Advanced Group would be more than willing to walk you through the benefits of triple glazing.

We understand that new windows represent a considerable spend, and paying for them in full all at once isn’t always feasible.
That’s why we offer 0% APR and up to 4 years of interest free credit, to make the purchase much less stressful!
It means you can get the windows you need by helping you spread the cost of your new windows and doors in a way that suits for you.
38 Years of Experience
We’ve been installing double glazing across Scotland since 1988.
38 years teaches you a great deal. What lasts. Which manufacturers to work with. How to train fitters who take real pride in their work. And it is evident on every job we complete.
15-Year Guarantee Included
15-year guarantee on every installation. Product and workmanship included.
Our guarantee beats the competition. We’re completely confident in our windows and our installers.
If anything goes wrong, you can trust us to sort it right.

As Scotland’s premier provider of energy-efficient double glazing products, we have an unmatched range of designs, frames, colours, and finishes.
You are welcome to visit our showroom, where we will be more than pleased to personally guide you through our entire collection.
If you are considering the installation of new windows or doors in your Dumbarton home, The Advanced Group would be more than pleased to support you.
Whatever your window and door plans are, we’ll set up a home survey at a time that works for you, take measurements, discuss your choices, and provide a written quote with no obligation and no pressure.
Should you wish to see our range of windows and doors in person before making a choice, you are invited to visit our showroom.
To book your free quote or home survey, please contact a member of our welcoming team today.
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.












