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Welcome to Pendragon Home Improvements Specialists in Replacement Windows & Doors

Transforming Your Home with Style and Efficiency

At Pendragon Windows & Doors, we specialise in providing high-quality double glazing in Cardiff as well as replacement windows & doors that not only enhance the beauty of your home but also improve its energy efficiency. Located in the North of Cardiff, we understand the unique character of the properties in this area, ranging from charming Victorian homes to modern builds. Our range of UPVC windows, composite doors, & aluminium products are designed to complement the diverse architectural styles found in Cardiff, adding both style & value to your property.  So if you are looking to replace your existing double glazing please get in touch.

Our Products

UPVC Windows

UPVC windows are a popular choice for homeowners in Cardiff due to their durability, low maintenance & energy efficiency. Available in a variety of styles, including sash, casement, flush casement and tilt & turn, our UPVC windows can be customised to suit the architectural features of any property. Whether you’re looking to preserve the traditional look of a Victorian terrace or update a contemporary home, our UPVC windows provide the perfect solution. If you’re looking for the perfect double glazing in Cardiff, our UPVC windows provide outstanding insulation, helping to reduce energy bills and keep your home warm during the chilly & wet Welsh winters.

Horned Sash uPVC Box Window

UPVC Doors

Our range of UPVC doors offer a combination of security, style & energy efficiency. Available in a wide selection of designs & colours, these doors are an excellent choice for Cardiff homeowners looking to enhance their property’s kerb appeal. UPVC doors are particularly suited to the varied architectural styles in the area, offering a versatile solution that fits both traditional & modern homes. With multi-point locking systems and robust construction, our UPVC doors provide peace of mind while adding a welcoming entrance to your home.

Elbrus Composite Front Door with Side Panel
Elbrus Composite Front Door with Side Panel in Anthracite Grey

Composite Doors

For those seeking an entrance that exudes elegance & superior performance, our composite doors are an ideal choice. Constructed from a blend of materials, including a timber core, heat reflective skin & uPVC frame, composite doors offer the best of both worlds – the appearance of a traditional wooden door with the low maintenance & durability of modern materials. These doors are available in a range of styles, from classic to contemporary, making them perfect for Cardiff’s diverse homes. With excellent thermal efficiency & enhanced security features, our composite doors from Endurance are designed to keep your home safe & warm.

Aluminium Windows

Our Aluminium double glazed windows are the epitome of modern design, offering sleek, slim frames that allow for larger glass areas, maximising natural light. These windows are ideal for Cardiff homeowners looking to add a contemporary touch to their property. Aluminium is inherently strong, meaning our windows are highly secure & durable, withstanding the harshest weather conditions Cardiff has to offer. Available in a range of colours, aluminium windows can be tailored to suit any home, providing a stylish & energy-efficient upgrade.

Sliding Patio Doors in UPVC & Aluminium

Bring the outside in with our sliding patio doors, available in both UPVC & aluminium. These doors are perfect for Cardiff homes with beautiful gardens or panoramic views, offering easy access to outdoor spaces & flooding your home with natural light. UPVC sliding doors offer excellent thermal insulation & are available in a range of finishes to match your windows. Aluminium sliding doors, with their slim profiles and larger glass areas, provide a contemporary aesthetic while maintaining high energy efficiency and security standards. Both options are designed to glide smoothly, providing a seamless connection between your indoor & outdoor living areas.

Aluminium Sliding Patio doors

Aluminium Bifold Doors

Aluminium bifold doors are a popular choice for homeowners looking to create an open-plan living space that blends seamlessly with the outdoors. Perfect for Cardiff’s modern homes, these doors fold back to create a wide opening, ideal for entertaining or simply enjoying your garden. Our aluminium bifold doors are available in various configurations & finishes, allowing you to customise them to suit your home’s style. With excellent thermal performance & robust security features, these doors not only look stunning but also enhance your home’s energy efficiency & safety.

uPVC French Doors in white with georgian bar detail opening up into garden

French Doors in UPVC & Aluminium

French doors add a touch of elegance and charm to any home. At Pendragon Windows & Doors, we offer French doors in both UPVC & aluminium, catering to the diverse styles of properties in Cardiff. UPVC French doors are a popular choice for traditional homes, providing a classic look with modern performance benefits such as energy efficiency & low maintenance. Aluminium French doors, with their slim profiles & contemporary designs, are perfect for newer properties or those looking to add a modern twist. Both options provide excellent thermal insulation, security & durability, making them a stylish & practical addition to your home.

Why Choose Pendragon Windows & Doors?

We pride ourselves on delivering exceptional customer service & high-quality products tailored to the specific needs of our clients in Cardiff and the surrounding areas. Our experienced team will guide you through the process, from selecting the perfect windows & doors to professional installation, ensuring a hassle-free experience. All our products are designed to withstand the unpredictable British weather while enhancing your home’s aesthetic & energy efficiency.

Transform your home with Pendragon Windows & Doors – where quality meets style. Contact us today for a free consultation & discover how we can help you create a beautiful & energy-efficient home.

Recent Projects

Some recent projects that we have completed for clients.

Looking for Further Advice?

If you are looking for Advice about chosing your replacement uPVC or aluminium windows or doors then check out the rest of our Advice Centre which is packed full of handy information

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What our Clients Say

"Jules, Kay, and the rest of the team are outstanding. Customer service from beginning to end went above and beyond. Every stage was explained and communicated so that we knew exactly what was happening and when. Some minor issues during fitting were resolved without any fuss and we now have some fantastic looking windows and a much warmer house! Pendragon are definitely changing the face of the window industry with the high quality service they are providing. I cannot recommend them highly enough." - Gareth, Risca
"Grate customer service and aftercare, friendly family run business. It’s was a quick turnaround from ordering to installing! Very pleased with my new windows and door. Highly recommended if you want a hassle free friendly experience 5*****" - Chrissy, Machen
"Thrilled with our new Endurance Door from Pendragon! Jules was great from start to finish, patiently guiding us through design ideas until we settled on the perfect fit. Communication couldn’t have been better throughout process and the installers were professional, tidy and did a great job. Highly recommended!" - Felicia, Chepstow
"I had an excellent service from Pendragon. Great advice from the start and helpful and considerate. The installation of my windows happened so quickly and smoothly with no fuss or mess and I know it was no small job removing the old windows so 10 out of 10 and thank you!" - Toby, Hereford
"Had a wonderful experience with this family owned and run business. Polite,curteous and helpful all the way through. Came and measured up,listend to what I required,provided a detailed quote and waited for my response,no pressure sales,kept me fully informed throughout the process. Windows and doors are made to measure,bespoke to your property and look amazing. And Wow the front door is stunning and the icing on the cake is that they were not even the most expensive company out there. A wonderful experience with a stunning end result. Definately recommend using Jules and his team. First Rate Company" - Lesley, Newport
"Excellent experience with Pendragon Home Improvements. Ordering was easy, kept us informed all through the process. Door was delivered quicker than expected. The fitters were polite, efficient, did a top class job and cleaned up any mess. Highly recommend this company." - Julia, Pontprennau Cardiff
"The prospect of having all my windows replaced was daunting. Firstly trying not to get completely ripped off and secondly delay and fit issues. For once I made a really good decision. I replaced all my window. 15 windows and two sets of sliding doors. The whole process was exactly as promised. Jules and Kay are great business owners and offer a genuine local service without trying to con you like all the others who quoted. Get them to quote you and make your mind up for yourself. I have also received my Guarantee and Fensa certs so all necessary paperwork is complete. My house is quieter less drafty cleaner looking and thermally more efficient. Thanks." - Lewis, Cyncoed, Cardiff
"Gwasanaeth grêt, cyfarthrebiad dda trwy gydol y gwaith, a phris resymmol iawn. Dwin adorchmynnu galw ar Jules a Kay os wyt ti angen newyddu ffenestri neu drysau yn y tŷ.

Great service, good communication throughout. I can recommend calling Jules and Kay for anyone wanting to renew their windows and doors." - Barry, Pontypridd

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Need Inspiration for your Next Project?

Take a look at our gallery of home improvement projects for some inspiration

uPVC Flush Casement Windows in Chartwell Green full house inspiration
uPVC Flush Casement Windows on Heritage Property
Composite Door with double sidelight
Aluminium Sliding Patio Doors AluK Optio BSC94 Inspiration (1)
uPVC Flush Casement Windows in Black Heritage Cottage full house inspiration
uPVC Flush Casement Windows in Black Heritage Cottage full house inspiration
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Double Glazing Cardiff

Composite Doors Cardiff

Endurance Doors Cardiff

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©2025 Pendragon Home Improvements Ltd.

Unit 16c, The Rombourne Business Centre, Moy Road, Taffs Well, Cardiff, CF15 7QR

Pendragon Home Improvements Ltd is an Introducer Appointed Representative of Ideal Sales Solutions Ltd T/A Ideal4Finance. Ideal Sales Solutions Ltd is a credit broker & not a lender (FRN 703401). Finance available subject to status. The rate offered is always provisional & will depend upon your personal circumstances, the loan amount & term.