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Kitchen Extensions

Find everything you need in one place

Making your dream home a reality

Creating an open plan living space is a popular choice for homeowners, with many opting to extend their current house to add a kitchen extension or combining existing rooms into one large space.

National Plastics can provide everything you need to create your dream kitchen extension, from sleek aluminium bifold doors, roof lanterns and a myriad of roofline products.

Take a look at our product ranges in more detail and discover how National Plastics can take the hassle out of sourcing what you need for your kitchen extension project

internal view of an installed roof lantern

Windows & Doors

Bifold Doors

Enjoy unobstructed views of your garden and create a seamless transition between the indoors and the outdoors with a bifold door.

Our range of PVC-u and aluminium bifold doors are the must-have addition to any kitchen extension project, designed to create the perfect space for entertaining, relaxing or spending time with family and friends

Achieve open spans of up to 6.5m, each set of bespoke bifold doors are configured to suit your requirements with left, right and both sides stacking.


Our wide range of made-to-measure PVC-u and aluminium windows are available in a plethora of different styles including casement, Tilt and Turn, Fully Reversible and Vertical Sliders.

All are available in the colour of your choice and with the selection of finishing touches, hardware and glazing. Ensuring that your new windows and doors are perfect for your home.

Our Window and Door Gallery


Our aluminium & PVCu roof lanterns have a wealth of features

From stylish, envy-inducing looks to the highest level of performance our roof lanterns are the perfect choice for any flat roofed extension.

  • Clip on features – for fast, straight forward fitting
  • Simple, stylish design – perfect for every style of home
  • Less bars than other lantern roofs – minimal design to maximise natural daylight
  • High thermal performance – to ensure longevity and performance

Roof Lanterns
EPDM Rubber Roofing

EPDM Rubber Roofing

Our EPDM rubber roof range is perfect for both new-build and refurbishment projects. This maintenance-free waterproof membrane is the perfect partner to any flat roof kitchen extension.

Crucially, it does not crack, split or rot so you can rest assured that your beautiful extension will be safe from the elements. Its one piece installation removes the need for any joins, often the source of leaks and water ingress.

No specialist tools are required to install our EPDM rubber roofing and we stock the full range of adhesives, trims and seals in your local National Plastics branch.


extensive range of Roofline products

Our wide range of roofline products

We are leading suppliers of a full range of plastic roofline products to enhance your kitchen extension


No kitchen extension is complete until you've turned your attention to your outdoor area. Your garden is a continuation of your living space and the addition of a decking area brings a new meaning to open-plan living.

With the look of traditional timber without any of the hassle, our eco-friendly composite decking comes in two distinctive styles and are the ideal low-maintenance choice that doesn't compromise on aesthetics.

Choose from either our reversible ribbed and grooved boards or our woodgrain effect boards, both of which are:

  • 3600mm x 136mm x 21mm
  • Available in 5 colours
  • In Stock

Not sure how much decking you need for your project? We've created a handy calculator here.

We also offer free samples so you can take a closer look at the different styles and colours for your garden improvement project.

picture of composite decking installed with two garden chairs and an outdoor fireplace
National Plastics is a trading name of Specialist Building Products Limited, a wholly owned subsidiary of the Epwin Group Plc. Specialist Building Products Limited is registered in England & Wales. Company Registration number: 1268689. Registered Office: 1B Stratford Court, Cranmore Boulevard, Solihull, B90 4QT VAT Registration No. 864 4507 10