New windows can really enhance the look of your home, both from the inside and out.

We offer a wide range of styles to suit both traditional and new build properties. Opt for traditional white frames, or a natural woodgrain effect in golden oak, rosewood or mahogany. Then decide if you'd like Georgian, stained, diamond lead or bevelled glass. Whatever style you go for, you'll find our windows aren't just pleasing on the eye, they're practical too. Minimal maintenance means their good looks will last well into the future. 

We are installers of REHAU windows. REHAU is a premium worldwide brand supplying polymer based windows to professional installers, including Principality Windows Ltd. Their products are market leaders and are unrivaled in quality, technology innovation and exceptional design.


Our 70mm window system offers a range of styles crafted using PVCu which guarantee maximum energy efficiency and performance for your investment. There are two aesthetic options to choose from in our casement window range, chamferred and fully sculptured. If you would like one of our helpful, experienced members of staff to arrange a quotation for your window replacements please let us know. We are not salesmen and are happy just to be able to offer you our best prices

Casement Windows

The most popular window style installed within the UK, comprising outward opening, side or top hung vents. Either standalone or combined with fixed lights to produce combination frames. Casement windows can also be coupled to produce bow and bay windows. 

Tilt & Turn Windows

This features a dual opening mechanism for security, safety and practicality. By twisting the handle 90 degrees the vent tilts inwards to provide gentle ventilation. When turned to 180 degrees the side hinges engage to enable the window to be fully opened for cleaning & fire escape. 

Sash Windows / Vertical Sliders

Whether you are replacing existing timber sliding sash windows in period buildings, or adding character to any new development, box sash windows, or vertical sliders, offer an elegant, secure and thermally efficiant way to add character to your deserving property.

Using a combination of casement windows, tilt & turn windows or sash windows, bow or bay windows can add character whilst increasing the floor area inside your property. Bay windows are a great way of allowing more light to fill up your room as well.

Free no-obligation window quotation

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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
Double & Triple Glazing

Tell us the style you are looking to achieve or let us advise you on the best way to enhance to the appearance of your property. Triple glazing give greater benefits to sound proofing and heating your home.