Trusted Window & Door Installations in Lanarkshire
Lanarkshire is known for its cold climate, with cool summers and long, wet, windy winters that make proper insulation a priority. We supply energy-efficient, German-engineered windows for improved thermal insulation.
RePlace Windows is a leading installer of double and triple glazing across Lanark and the wider Lanarkshire area, having built an excellent reputation through competitive prices, reliable service and quality products. All new windows are fitted to the highest standards and personally inspected by our directors.

Our uPVC Windows
Our uPVC windows are made of Unplasticised Polyvinyl Chloride, a recyclable thermoplastic that appeals to energy-conscious homeowners. All our frames are fitted with state-of-the-art VistaTherm glass for optimal insulation, an affordable way to boost your home’s energy efficiency while enhancing its exterior look.
We offer a variety of styles, including:
Casement windows open outward for maximum airflow and flexible ventilation. Built from durable uPVC with strong locking systems, they withstand daily wear and changeable weather.
Tilt & Turn windows tilt inward for ventilation or turn fully for easy cleaning. This multi-point system balances versatility, security and thermal comfort, ideal for high-rise buildings.
Sash windows use two framed panels that slide over one another, replicating a traditional look while adding modern energy efficiency, ventilation control, security and ease of use.
Bay windows project outward with a large central pane flanked by two angled side windows, adding light, airflow and space. A timeless choice, popular in Lanarkshire's period and traditional properties.
Window Colours
We offer a huge range of colours, with popular picks including white, black, rosewood and anthracite grey. Not seeing your colour? Get in touch and we’ll show you the full range or discuss custom options.
Get in touch with our uPVC window installers in Glasgow for advice about the best PVC windows for your needs.
Born in Germany · Made in Glasgow
⭐⭐⭐⭐⭐ 5 Star Reviews across Google, Which?, Yell & Facebook.
The work done was immaculate and they were really helpful. Couldn’t fault them, highly recommend.Checkatrade Review | Coatbridge
This company was recommended to myself and I have recommended to others.Checkatrade Review | Coatbridge
Extremely clean and tidy, would have them back in a heartbeat if I had any more work.Checkatrade Review | Glasgow
Much better finish and a more professional job than the other windows which were replaced a few years ago by the top firm at the time. Excellent work.Facebook Review | Marion
Really nice to deal with. Would definitely recommend to others. Looking forward to using them again for future work.Checkatrade Review | Glasgow
Was a quick and good quality window replacement!Facebook Review | Lewis
Our Double-Glazed Doors
Our doors come with multi-point locking and a choice of double, triple or acoustic glazing, balancing style, security, thermal comfort and efficiency. We offer bespoke design and installation for uPVC front doors and uPVC back doors.
uPVC Doors in Lanarkshire
Our range of uPVC doors is durable, sustainable, easy to maintain and offers great customisation options. Alongside strong insulation, they’re fitted with an advanced multi-point locking system for added security.


Composite Doors in Lanarkshire
Composite doors are one of our most popular products thanks to a hard-wearing build combining a solid timber core, high-density polyurethane foam and GRP. Aluminium inserts reinforce the frame against warping, while the GRP outer skin stands up to rain, hail, snow and storms.
French Doors in Lanarkshire
Exterior French doors create a wide, elegant entrance that maximises airflow and access to gardens or balconies. A-rated with low-U-value double or triple-glazing, they combine excellent thermal performance and security, perfect for terraces, balconies and garden entrances.


Patio Doors in Lanarkshire
Patio doors create a seamless link between your living space and the outdoors. These large sliding doors save space while maximising natural light and airflow, balancing strong security with excellent thermal performance.
Bifold Doors in Lanarkshire
Bifold doors open up your living space with a seamless indoor-outdoor flow. Large glass panels sit within sturdy aluminium frames that fold and stack neatly aside, allowing wider openings than sliding doors, ideal for kitchens, garden rooms and balconies, with double or triple glazing for year-round comfort.

Glazing Options
As Lanarkshire’s trusted double and triple-glazing specialists, we design glazing solutions built to handle whatever the weather brings.

Double Glazing in Lanarkshire
RePlace Windows provides premium double glazing for windows and doors across Lanarkshire. Double-glazed windows are a smart investment, offering superior thermal regulation, noise insulation and security for homes that can be prone to weather-related decay. Our REHAU frames are built for maximum durability and resilience, providing warmth and comfort through Scotland’s harshest weather.
Triple Glazing in Lanarkshire
Triple-glazed windows add an extra panel of glass for superior insulation, soundproofing and security compared to double glazing, resulting in a warmer, safer home with lower energy bills. At 42-44mm thick with an ‘A’ energy efficiency rating, these units fit various uPVC window and door styles across Lanarkshire.


Acoustic Glazed Windows in Lanarkshire
Our acoustic glazed windows absorb sound waves, cutting external noise by up to 40 decibels. They deliver excellent sound insulation without blocking your view, ideal for homes near busy roads in Lanarkshire.
Double Glazed Aluminium Windows in Lanarkshire
Our aluminium windows combine a sleek, contemporary look with lasting durability, corrosion-resistant and low-maintenance for Scotland’s oceanic climate. Thermally-efficient polyamide breaks support double or triple glazing, while slim sightlines maximise light and multi-point locking boosts security.

RePlace Windows: Quality Double Glazing in Lanarkshire
At RePlace Windows, we’ve been supplying and installing high-quality windows and doors across Scotland since 2014, combining expert craftsmanship with personalised service from design through installation.
Our priority is to ensure a relaxed, transparent and friendly service. We supply replacement windows across Lanarkshire and continue to build a trusting client base due to our professional service and high-quality products.
Here are just some of the reasons why Lanarkshire residents trust us for their window replacements:
- Trusted local installers with over 30 years of combined experience
- Comprehensive 10-year guarantee for peace of mind
- Transparent pricing and a supportive, customer-first process
RePlace Windows are trusted window replacement specialists in Lanark and greater Lanarkshire. Contact us today to find the right double glazed uPVC windows for your Lanarkshire home.
Frequently Asked Questions
uPVC windows are frames made from unplasticised polyvinyl chloride, a rigid, durable plastic widely used in construction across Lanarkshire. They’re one of the most popular window choices in the UK thanks to their low maintenance, energy efficiency, durability and range of traditional and contemporary designs. Modern uPVC is also fully recyclable, making it a sustainable option for local homeowners.
Also read our guide about the Difference Between PVC & uPVC.
uPVC windows are known for their affordability, though the style you choose will affect the overall price. For Lanarkshire homeowners, the average cost for a new uPVC window typically falls between £500 and £1,500, making them a cost-effective choice for local properties.
uPVC windows are well suited to Lanarkshire’s cold, wet weather. Their insulated multi-chamber frames create a tight seal against draughts and water leaks, while built-in drainage channels guard against moisture build-up. This design delivers strong energy efficiency and long-lasting weather resistance for homes across the region.
High-quality uPVC windows fitted by trained professionals can last 25 to 35 years, standing up well to Lanarkshire’s weather without warping, fading, peeling or rotting. Regular cleaning and maintenance still helps keep them efficient and smooth-running. Simply wipe them down with a damp cloth and lubricate moving parts.
Also see our guide for How Long Do uPVC Windows Last?
Yes. Older uPVC windows in Lanarkshire homes can be upgraded with double or triple glazing, multi-point locking systems and improved insulating seals. RePlace Windows can retrofit your existing frames without a full replacement, giving you better security, energy efficiency and thermal comfort with minimal disruption and cost.
Contact our PVC installers to find out more about our retrofitting service.
Common signs include draughts, sashes that jam or are difficult to open and close, condensation between glass panes, and cracked seals or frames. Given Lanarkshire’s damp winters, it’s worth checking regularly to catch moisture damage early.
We can conduct a free site survey and heat loss test to determine if it’s time to replace your uPVC windows.
Book your free survey online today.
Have more questions? Our team can answer them.
Visit our Showroom
31 Fairfield Place, East Kilbride, G74 5LP
Our Work
Have a look at our case studies to see some of the work we’ve done in Glasgow and across Scotland. See some of our completed work in our gallery.























































