• PVC casement Windows External Doors online
  • Smarts Aluminium Casement Windows
  • PVC Casement Windows
  • Smarts Aluminium Casement Windows External Doors Online

PVC & Aluminium Windows


With ever rising energy bills, our high quality our Thermally Efficient PVC & Aluminium Casement Windows are the perfect choice for your home. Capable of achieving a U-Value of 0.8 and available in a wide variety of colours and finishes as standard, transforming your home whilst reducing energy bills has never been easier. Choose between traditional casement, modern flush sash and versatile tilt & turn windows to create the perfect aesthetics for your home.

PVC Casement Windows

Key Features

U-Value â–· 1.2 (standard)

Energy Rating â–· A+ Rated (standard)

Triple Glazed Upgrade â–· 0.8 u-value & A++

Security â–· High Security Standard (PAS24 available)

Warranty â–· 10 Years

From £45 inc VAT - free delivery

PVC Flush Sash Windows

Key Features

U-Value â–· 1.2 (standard)

Energy Rating â–· A+ Rated (standard)

Triple Glazed Upgrade â–· 0.9 u-value & A++

Security â–· High Security Standard (PAS24 available)

Warranty â–· 10 Years

From £65 inc VAT - free delivery

PVC Tilt & Turn Windows

Key Features

U-Value â–· 1.2 (standard)

Energy Rating â–· A+ Rated (standard)

Triple Glazed Upgrade â–· 0.9 u-value & A++

Security â–· High Security Standard (PAS24 available)

Warranty â–· 10 Years

From £65 inc VAT - free delivery

Aluminium Casement Windows

Key Features

U-Value â–· 1.6 (standard)

Energy Rating â–· A Rated (standard)

U-Value (upgraded double glazed) â–· 1.4

Security â–· High Security Standard (PAS24 available)

Warranty â–· 10 Years

From £110 inc VAT - free delivery

Aluminium Flush Sash Windows

Key Features

U-Value â–· 1.6 (standard)

Energy Rating â–· B Rated (standard)

U-Value (triple glazed) â–· 1.4

Security â–· High Security Standard (PAS24 available)

Warranty â–· 10 Years

From £160 inc VAT - free delivery

Aluminium Tilt & Turn Windows

Key Features

U-Value â–· 1.5 (standard)

Energy Rating â–· B Rated (standard)

U-Value (triple glazed) â–· 1.1

Security â–· High Security Standard (PAS24 available)

Warranty â–· 10 Years

From £160 inc VAT - free delivery

PVC & Aluminium Windows Explained

From parts, options and components, to measuring and installation guides, click through the tabs below to learn everything you need to know before placing your order.

Safe & Secure

At External Doors Online, we understand the importance of keeping your home safe and secure. Our range of PVC & Aluminium Casement windows are high security as standard, fully fitted with insurance approved multi-point locking bolts and multi-point locking keeps. With the option to upgrade any of our casement windows to PAS24, you can rest easy knowing that your home is safe and secure for years to come.

PVC Casement Window Cream Trickle Vent
PAS24 External Doors online

Thermal Performance

With ever soaring energy costs, it’s important to choose the right windows for your home. Our extensive range of casement windows are manufactured using state-of-the-art machinery and the highest quality materials, to ensure that they offer they help to insulate your home and reduce energy costs. As standard all of our casement windows are supplied with double-glazed argon filled units, and you have the option to upgrade these to triple glazed argon filled units, for even greater thermal performance.

Energy rating external doors online

How to Measure

Measure the opening outside on both the height and width. Always measure the exact brickwork opening and not the old window frame.

Measure brick to brick in at least three different places and deduct 10mm from both the final height and width measurements to allow for 5mm fitting allowance around the new window frame. This will enable you to ensure the new frame sits plumb and square once in the aperture. Spacers and filler will then be required to secure the frame into place and fill any gaps.

PVC Casement Window width
PVC Casement Window Height

Please remember:

Do not measure your existing window or frame, but measure the brick opening.

Measure in at least three different places and deduct 10mm from both the final height and width measurements - we do not make any fitting allowances on the sizes you provide.

Measurements will need to include the frame, cill and any frame extenders/add on’s required.

All dimensions to be supplied in metric and all styles viewed externally.

Transom Drop

The transom drop is measured from the top of the outer frame and down to the centre of the horizontal bar.

Mullion Width

The mullion is measured from the outer edge of the frame to the centre of the vertical bar

**Please note that measuring guides are for guidance purposes only. Specifications within the guides may differ. Measuring should always be carried out by a qualified or competent individual. External Doors Online do not accept responsibility for any errors during measuring.

Eurocell PVC Windows

PVC casement window woodgrain colours

With any of our PVCu products, you can choose a colour that suits your property perfectly and that gives it that first
impression you’ve always dreamt of. As standard, our windows and doors come in a smooth white finish, although
because every home is different, we offer a large range of different colours in both a smooth and woodgrain finish.


Our PVCu windows and doors are available in 26 colours from stock. By choosing a woodgrain foiled finish
you are able to bring your windows to life with a glossy, freshly painted, realistic timber effect.

Smarts Aluminium Windows

Aluminium Casement Window Colour

At External Doors Online, our Aluminium Casement windows are available in three standard powder coated colours, with the option of choosing a different colour for the interior to help you create the look that is perfect for your property.

The standard colour combinations are as follows; grey out / grey in, white out / white in, black out / black in, grey out / white in & black out / white in.

We can also offer our aluminium windows in a bespoke RAL colour code of your choice.

PVC Window Brochure

Click the image below to download

Alitherm 400 Brochure

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Alitherm 800 Brochure

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Tilt & Turn Brochure

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Contact us to speak with one of our customer service experts

01484 613104

Monday - Friday 8.30am | 5pm Saturday 9am-2pm

Calls may be recorded for training purposes


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