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Replacement Windows

Replacement Windows – The perfect way to add more value to your home.

In addition to being stylish and secure, our PVCu Window Systems boast a ’Green Guide’ A-rating. This will help their owner to shrink energy bills – giving them a warm feeling which will last as long the windows! Throughout their long lifespan, they’ll remain efficient, attractive and virtually maintenance-free as they were when they were fitted.

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PVCu Window Systems

Image of beautiful replacement leaded windows

We specialise in helping our customers to make their homes more secure and more beautiful.

We achieve this by making PVCu windows and doors of an exceptional standard. Our track record proves that to ‘replace’ really can be to ‘upgrade’. So whether you’re looking for more of a wow factor, more security or to add more value to your home, we can help.

Image of a cross-section of a PVCu replacement window

Our PVCu replacement windows are as long-lasting as they are beautiful – and as elegant as they are energy efficient. They’ll make your rooms quieter, safer and more secure. Plus they’re available in a wide range of colours: White, Woodgrain, Antique Oak, Cream, Rustic Cherry or one of our 10 other Artisan colour options.

Our windows have achieved accreditation from the British Board of Agrément, the organisation that decides which building products are fit for purpose.


We don’t take chances with your home security

At J. Moon Home improvements, we won’t cut corners by using inferior home security locks and fixings. We use Yale door and window security products because since 1840, Yale has been leading the way in the locking industry, continually pioneering new products to keep people and property safe. Their brand name is known worldwide for quality, innovation and steadfast security.

Our Yale door and window security products come with a 10 Year Security Guarantee.




We understand that every house has its own unique character.

Image of lead window decorationThis character can be sympathetically enhanced by the addition of the perfect windows – windows which make a statement (subtle or bold, restrained or dynamic), we will work with you to ensure that whatever your choice of ‘style’, the statement that your windows will add will be ‘quality’.

By selecting windows and doors manufactured from PVC-U rather than other alternative framing materials, you can be confident that these products will never flake, peel, rust or rot and they will provide beautiful good looks and maintenance freedom for many years to come.

Not every replacement window system comes with the BS 7950 standard to demonstrate a superior security performance. Ours do.

With a wide range of colours and hardware options to choose from – and even our new self-cleaning glass or triple glazing if you’re looking for the ultimate energy savings and noise reducing windows, J. Moon Home Improvements can transform you’re home.

Bay & Bow Windows

A brilliant way to add a little extra space is to simply by replace existing windows with our bay or bow window systems.

Bay windows elegantly extend the footprint of the room slightly and add so much extra light and functionality to the room. See picture on left below.

Bow windows (built out from existing walls) cleverly extend room space by adding a whole new dimension to the house. See picture on right below

With our choice of White, Woodgrain or 13 beautiful Artisan colours our bay and bow window range not only delivers a wide choice of styles and colours, but also provides peace of mind, with our advanced locking system – and more peace and quiet, thanks to the sound-reducing advantages of double glazing.

Images of Bay and Bow Window replacements


Replacement Windows – Colour options


In addition to White, we offer three woodgrain shades with our windows and doors – elegant Mahogany, warm Golden Oak and gorgeous Cherrywood.

Expressing yourself with these colours isn’t limited to just one selection. For example you can specify White on the inside and your woodgrain colour of choice on the outside.

So your PVCu windows and doors will look great from every angle.

All of our colour options deliver the practical advantages of PVC-U windows – energy efficiency, security and low maintenance.

Artisan woodgrain collection

Want to live life in full colour? Now you can do exactly that, with a bigger choice of colours for your replacement windows and doors.

13 eye-catching Artisan shades are available, gorgeous, striking colours like Green, Grey and Cream, or our sumptuous selection of woodgrains such as Rustic Cherry, Irish Oak, AnTeak and Antique Oak. You decide.

Our woodgrain finishes are so fine that it’s almost impossible to distinguish them from the real thing!

Specify dual colour if you want to enjoy the brightness of white on the inside frame faces and a striking colour finish on the outside.

Alternatively for added impact, bring the colour indoors by opting for your chosen colour on both sides.

Our Artisan range really lets you make a design statement. Coupled with all the long-lasting quality and exceptional security of PVC-U windows and doors, it’s proof that quality and beauty belong together.

To create added impact with your replacement windows and doors, just add a splash of colour!

Image of conservatory colour options

Vertical Sliding Window Systems

Our elegant ‘CONSERVATION GRADE’ vertical sliding PVCu sash windows provide all the benefits of period charm while retaining the high technology of PVCu at a cost-effective price.

Our Heritage range uses PVCu over timber ensuring superior thermal retention properties, excellent weathering performance over time and very low maintenance for the end user, without losing the character of a sash window.

Image of young woman opening a replacement sliding sash window

This is arguably the best vertical slider design configuration on the market:

  • Now available with run through sash horns
  • 9 colourways available including the new Irish Oak
  • Period vertical sliding sash window look
  • High energy efficiency
  • Frames designed for high security
  • High quality hardware
  • Multi-tilt opening for ease of maintenance

image of a vertical sash window installation in Norfolk

Image of colour chart for replacement PVCu sash windowsVertical Sliding Window Systems Colour options


In addition to White and Cream, we offer three woodgrain shades with our vertical sash windows – Irish Oak, Golden Oak and gorgeous Cherrywood.

Hardware options

Image of a replacement window security locking handleWe offer an extensive choice of operating hardware for our replacement windows and doors.

These practical fine details that can make all the difference between a nice change to a home – and a truly stunning one.

You’ll find exactly the right match for your particular taste and preferred style. We have hardware options in Gold, White or Chrome finishes. Choose easy-to-use locking mechanisms that feel just right.

Get your hands on our shapely window and door handles that will finish your any window installation to perfection.

Image showing how self-cleaning glass works

Self-Cleaning Glass

Our range of self-cleaning and solar control glasses are the perfect choice for customers looking for the ultimate in glass solutions.

Every glass unit incorporates true, dual action self-cleaning glass. This breaks down dirt and washes it away as illustrated in the diagrams shown opposite. The water does not form into droplets on its surface! This means that you can see clearly out of your windows even when it is raining. Additionally, when the water evaporates it doesn’t leave behind the usual dirty water droplet marks. The result is that windows stay cleaner for longer!

The self-cleaning coating is also applied as the glass is actually being manufactured. This means that it is fused into the surface and therefore lasts the lifetime of the pane of glass. Superior to the spray on ‘easy-clean’ coatings which wear off after a period of time and need to be re-applied.

How self-cleaning glass works:

  • Actively breaks down organic dirt.
  • Water sheets across its surface to wash dirt away.
  • Clear vision even when it’s raining.
  • Dirty water droplet marks are all but eliminated.
  • No need to re-apply the self-cleaning coating.

Internal picture of WarmCore warm aluminium windows installation in Norfolk UK

NEW… See our WarmCore warm aluminium windows