What is Double Glazing?
Double glazing comprises two panes of glass separated by an insulating gap filled with air or inert gas, such as Argon. The sealed gap reduces heat loss and helps maintain a comfortable indoor environment, making the unit more energy-efficient.
Our 28mm-thick double glazing can be installed in a huge range of uPVC window styles, including:
Double glazing also suits composite doors, uPVC sliding patios and French doors, providing consistent performance across your home.
Why Choose A-Rated Energy Efficient uPVC Double Glazed Windows?
RePlace Windows installs durable double-glazed glass windows manufactured to the highest standards, fully compliant with Scottish Building Regulations for energy efficiency and safety. We assess the effectiveness of our modern double-glazed windows based on their U-value energy rating.
Our high-performance, low-emissivity (Low-E) double-glazed glass windows use the latest thermally insulating technology. The thin, microscopic coating effectively reflects long-wave heat radiation into the room, minimising heat loss while maximising natural light and solar heat retention.
Energy Efficiency
With their low U-value, our energy-efficient windows minimise heat transfer, creating an outstanding thermal barrier that requires less energy and reduces heating bills.
Increased Security
The solid construction of our double-glazed windows forms a strong, secure barrier against forced entry, with visible security features that deter intruders.
Improved Comfort
Double-glazing materials help reduce condensation, providing a consistent temperature that eliminates cold spots and draughts.
Meet UK Building Regulations
Fully compliant with the latest UK building regulations, our double-glazed uPVC windows help you play your part in reducing our carbon footprint.
Reduced Noise Pollution
Our double-glazed acoustic windows reduce noise pollution, with the gap between the two panes of glass providing a shield that weakens sound transmission.
Increased Property Value
Double glazing can increase your property’s value, as its energy efficiency and thermal insulation make it more desirable for many potential buyers.
No pitch · No strings · No pushy people. Get in touch with us to book your free, no-obligation, half-hour consultation to find out if our double glazed windows are right for your home.
Born in Germany · Made in Glasgow
⭐⭐⭐⭐⭐ 5 Star Reviews across Google, Which?, Yell & Facebook.
10 Year Guarantee
RePlace Windows is known for its high quality window installation service in Glasgow, but don’t just take our word for it — our customers testimonials speak volumes about our customer service.
We also offer a full 10 year guarantee on our products to give you added peace of mind.
We provide a fully comprehensive 10-year guarantee that covers the glazing, moving parts, sealants, and all the internal work for every window we install so we are accountable for any faults.
- Maximum Energy Efficiency
- Bespoke Designs
- Durable uPVC & Glass
- Optimum Safety And Security
⭐⭐⭐⭐⭐ across 5 review platforms
Frequently Asked Questions
Find answers to common questions about double-glazing uPVC window units here.
Double-glazed windows suit most property types, including:
- Homes
- Tenements
- Residential Apartments
Note: Some older properties may require specific types of glazing or may not be suitable for this treatment.
Yes. With our coloured uPVC windows, you add style and personality to your home while keeping all the performance benefits of modern double-glazing.
Our wide range of durable frame colours includes:
- Anthracite grey
- Black
- Golden Oak
- Rosewood
Colours are available across all our popular window styles. For a bespoke finish, you can even choose premium or dual‑colour options.
Double-glazed uPVC windows combine two panes of glass with a durable, low-maintenance frame.
Key details include:
- Secure hardware
- Excellent Insulation
- Lasting Performance
They suit a huge range of new window styles and are easy to maintain.
In contrast, wooden windows offer a classic, natural finish and good insulation but require regular upkeep, such as painting or sealing, to prolong their lifespan. Both materials can accommodate double glazing, so the main differences are maintenance, style and price.
Bottom line: uPVC windows offer effortless performance and security, while wooden alternatives appeal if you want traditional aesthetics and character.
Yes, new double-glazed windows are worth the upfront price. Here’s why:
- The multiple layers of glass help reduce heat loss, maintaining a comfortable internal temperature and keeping energy bills low, saving you money.
- Double-glazed glass windows block over 90% of UV light, reducing sun damage to carpets, furniture and artwork.
- The two glass panes of a replacement double-glazing window can help reduce noise pollution from outside, resulting in quieter homes with acoustic insulation.
- If you live by a busy road or in a noisy urban area, double-glazed windows can help traffic and neighbour noise feel softer inside.
With proper maintenance, new windows can last up to 20 years or more. However, the lifespan of your replacement double-glazing windows can vary depending on factors such as:
- Installation quality
- The type of frame and glass
- Environmental conditions
Spacer bars sit between the two panes of glass in double-glazed uPVC windows to maintain a stable gap and ensure the unit seals properly. This gap traps air or insulating gases, improving thermal efficiency while reducing heat transfer.
Modern warm-edge spacer bars are made from low-conductivity materials that limit heat loss at the glass edge, reducing condensation forming on the inner pane. They also contribute to the uPVC window’s structural integrity and long-term performance.
To maintain double glazing, it is essential to:
- Keep the frames and glass clean
- Regularly lubricate any moving parts
- Check for any signs of damage or wear
- Ensure that any seals or gaskets are intact and in good condition
Visit our Showroom
31 Fairfield Place, East Kilbride, G74 5LP
Get in touch with our double glazing installers in Glasgow to discuss your needs in more detail.
We are so confident in our double-glazing fitters that each installation comes with a complete 10-year guarantee. Our finishing touches include professional airtight sealing and a thorough clean-up, ensuring a perfect result every time.
Expect no surprise with our transparent pricing. What we quote is what you pay. Your quote clearly covers all materials and installation, giving you peace of mind.
Spread the cost of your new windows with flexible repayment plans from 3 to 10 years. Our flexible finance options make upgrading your home easier and more affordable.
We conduct a free heat-loss survey to recommend the best double-glazed windows for your home.
Our expert team oversees the installation process from consultation to final fit, ensuring your windows are installed efficiently, professionally and without hassle.
Trusted by hundreds of Glasgow homeowners, our Google Guaranteed service has earned 5-star reviews, reflecting reliable workmanship and satisfied customers.
Other Products
Need enhanced protection? Explore our windows with triple glazing. If you’re looking for an entirely different window style to complement your home, we also supply and install high-quality uPVC bay windows.
Casement
Beautiful energy efficient casement windows.
Tilt & Turn
Available in double, triple and acoustic glazing.
Coloured Windows
A wide range of beautiful colours available.
Bay Windows
Best quality, care and research on Bay Windows.
Triple Glazing
A collection of the best triple glazing.
UPVC Windows
Unplasticised Polyvinyl Chloride, commonly known as uPVC windows, is an insulated glazing that comprises two or more glass panes. This strong and low-maintenance plastic is used to minimise heat transfer. We provide a wide range of window styles and colours to complement your home. Our team also offers professional advice on your options and customised specifications to fit your property.
The various uPVC window styles offer several key advantages, including:
- Energy efficiency: UPVC windows provide very good insulation, which helps to keep homes warm in the winter and cool in the summer, reducing energy bills.
- Low maintenance: uPVC windows require very little maintenance compared to other materials such as wood, which needs regular painting or staining.
- Durability: Double glazing uPVC windows makes the product more durable and long-lasting, with a lifespan of up to 30 years or more.
- Security: They are very secure, with multi-point locking systems and toughened glass, providing peace of mind.
- Noise reduction: Very effective at reducing outside noise, making homes quieter uPVC more peaceful.
- Aesthetics: Available in a range of colours and styles, allowing homeowners to choose a design that complements their home's style.
- Eco-friendly: uPVC units are recyclable, making them a fantastic choice environmentally friendly choice for new windows.
- Improved home value: A uPVC double glazed window fitting can increase the value of a home, making it more attractive to potential buyers.