A-Rated Energy Efficient uPVC Double Glazed Windows
Double glazing windows ensures your house stays warm, cosy and energy-efficient throughout the year.
RePlace Windows installs durable double glazed windows manufactured to the highest standards. We can evidence each specification and even evidence the glass in your installation. We assess the effectiveness of our A-rated double glazing in U-value. This is the same language used in the Scottish Building Regulations.
The high-performance, low-emissivity (Low-E) glass we use for our glazed windows incorporates the latest thermally insulating glass coating technology. The microscopically thin coating effectively reflects long-wave heat radiation into a room, minimising heat loss while maximising natural light and the retention of solar heat.
What is Double Glazing?
Double glazing comprises two panes of glass separated by a gap of air or an inert gas like Argon. The gap is an insulating layer, reducing heat loss and making the unit more energy-efficient.
Our 28mm thick double glazing can be installed within a wide range of windows, including casement windows, tilt and turn windows, bay windows, and sliding sash windows. Double glazing is also suitable for composite doors, patio doors, and french doors.
Read about the benefits for double glazing for Scottish climates.
Energy Efficiency & Lower Utility Bills
With their low U-value, our energy-efficient windows minimise heat transfer, which creates an outstanding thermal barrier. This means less energy is required to heat the home in winter, which means lower energy bills.
Increased Security
The solid construction within the multiple layers of our double glazing forms a strong, unified barrier to prevent forced entry. Visible security features are also a strong deterrent, as intruders often target easier entry points.
Improved Comfort
Double glazing helps reduce condensation, making the home more comfortable. The consistent temperature throughout your living space eliminates cold spots and drafts, creating a more pleasant environment year-round.
Meet UK Building Regulations
Our double glazed windows improve the energy performance of your home in line with the latest UK building regulations. We consider all factors and ensure your house is compliant while reducing your carbon footprint.
Reduced Noise Pollution
Double glazed windows, like acoustic windows, can help reduce noise pollution from outside the home. The gap between the two panes of glass acts as a sound barrier and reduces the transfer of sound waves.
Increased Property Value
Double glazing windows can increase your property’s value because improved energy efficiency and thermal insulation make a home more desirable for many potential buyers in colder climates like Scotland.
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 all our double glazed windows to give you added peace of mind.
Our fully comprehensive 10-year guarantee 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
We’ve answered some of the most common questions about double glazing windows below.
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 layers of glass used for glazed windows help to reduce heat loss in the home, maintain a comfortable internal temperature, and keep energy bills low, which can help you save money on heating.
- Double glazing blocks over 90% of UV light, which reduces sun damage to carpets, furniture, and artwork.
- The two glass panes of a double glazed window can help reduce noise pollution from outside, resulting in quieter homes. If you live by a busy road or in a noisy urban area, double-glazing can help traffic and neighbour noise sound 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
Still have questions? Get in touch with our installers and we will happily answer your questions.
Visit our Windows Showroom
31 Fairfield Place, East Kilbride, G74 5LP
Here are some other reasons why homeowners across Scotland trust us as their local double glazing installer.
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
Our glazed uPVC windows are available in various styles to ensure you find the right replacement window for your home. We also manufacture and install triple glazed windows. Browse our other windows below.
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.