We offer premium quality, locally manufactured, high security A-Rated uPVC windows to suit all property styles. All of our windows are Energy Rated, attractive and all installations are covered by a 10 year guarantee.

Whether you require Patio, French, Bifold, uPVC or Composite doors, we have the product for you. You can even design your own GRP Composite Door on our website and try out different styles, colours and options.

If you are suffering from misted units, cracked glass or condensation you may not require a new window. We are happy to provide replacement glass units at a fraction of the cost of replacing your windows.

The best windows South Wales has to offer!

We are a FENSA registered double glazing company with over 30 years of experience and an extensive knowledge of installing windows, doors and conservatories. We are happy to help you design and plan the layout, colour and style of your new windows and doors and are happy to advise you on energy ratings. 


Here at Principality Windows we aim to make all your home improvement projects run as smooth as possible, from the initial meeting through design and final installation. We are able to cherry pick the best quality products that are available within the industry, which ensures our clients can rest assured that they are having the best products at competitive prices.


We provide a first class professional service to the people of South Wales and surrounding areas. If you would like to enquire about home improvements to your home please visit our Contact page and send us a message. Alternatively please call the Office on 01685 884 960, Kevin on 07875 051 169,  to arrange a free, no obligation quotation.


A chat costs nothing, and could save you being overcharged by larger companies who charge you for their commissions and advertising!

double glazing south wales

South Wales windows at their very best!

Principality Windows in South Wales are windows at their finest. Whether you are looking for uPVC or Aluminium windows in Caerphilly, uPVC or Aluminium windows in Aberdare, uPVC or Aluminium windows in Bridgend, uPVC or Aluminium windows in Cardiff, uPVC or Aluminium windows in Newport, uPVC or Aluminium windows in Swansea, uPVC or Aluminium windows in Brecon or new windows anywhere in South Wales, Principality Windows are here to help. Our South Wales team of professional window fitters care about the services we offer to our customers. We may be a small team but we can deliver with jobs and projects large and small!


We can provide Aluminium or uPVC Vertical Sliding (Box Sash) Casement, Bay, Tilt & Turn, Arched, Round and Angled windows. Composite Front, Back, Stable style, Patio, Bi-folding, and French doors. We can also take care of repairs and glass replacement for your existing windows or doors.


We always offer a no obligation quote and in most cases can provide a full quote within 24 hours.

Best priced Composite Doors in South Wales

What is a composite door?


Composite Doors are extremely robust, secure and attractive entrance doors with the appearance of wooden doors. They do not posses the same negative qualities of wooden doors, in that they will not warp, rust, peel or fade, and they do not require painting.

Distinction Doors offers an extensive range of stunning GRP composite doors, with over 30 door styles, 40 colours and our stunning new glass designs to choose from, you can create a bespoke Distinction door that is unique to your home.

The woodgrain finish on a Distinction GRP composite door is developed from oak tree wood grain, creating a beautifully authentic appearance and superior performance that is only available on a Distinction door. Our range of colours, styles and glass options will make your door truly unique and by ensuring that we perfectly match the colour, wood grain and moulding on the glazing cassettes, you can guarantee a flawless finish.

All of our Distinction Glass designs complement our door styles and colours and are triple glazed and laminated as standard for extra security and energy efficiency.

10 Year Insurance Backed Guarantees

home pro insurance backed guarantee

The HomePro Group has specialised in the home improvement industry for over thirty years and has become one of the UK's leading providers of deposit protection and insurance backed guarantee products in the home improvement sector.

All supply and fit jobs that we perform will be covered by a 10 Year Insurance Backed Guarantee, including deposit protection.

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Copyright © 2018 by Principality Windows Ltd

Registered in England and Wales. Company Registration No 9989841. VAT Registration No 252264716


01685 884 960

07875 051 169












South Wales Valleys

Llantwit Major


double glazing installers
FENSA Aberdare
rehau authorised partners
home pro insurance backed guarantee