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A Plus Windows fits "A+ Windows" as standard.


At Plus Windows, we install windows of the highest quality and energy efficiency at a reasonable price. Based in Bristol we specialise in a comprehensive window service that involves seamless design, survey and installation process. From our initial visits, quotes, and measurements to helping you to design your windows and taking care of the final installation, you’ll find our team professional and hardworking as well as friendly and easy to communicate with.

Team of Experts

Our professional designers and surveyors are widely experienced in domestic and commercial projects, as well as working alongside building contractors, new builds, extensions and renovations. We install across Bristol, Bath, Gloucestershire, Somerset and Wiltshire, using quality Swish UPVC windows manufactured in the West. As authorised installers for Swish, we are proud to be a local  along with a British product to help with investing in the local community.

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Casement Windows

Our casement window is a window attached to its frame by 1 or more hinges at the side. If there is limited access to your house, you may also choose fire escape hinges on your windows as a means of escape. The easy-clean hinge option can also lower your window cleaning bills by enabling you to clean the first-floor windows without the use of a ladder.

Spoiled for Choice

Bring you complete flexibility in terms of design, we offer you an incredible choice of styles and looks, such as: 

  • Casement Windows
  • Bay Windows
  • Bow Windows
  • Top and Side Openings
  • Plain Styles
  • Patterns
  • Coloured Styles
  • Leaded Glass 

The latest high-performance, maintenance-free UPVC windows will keep you warmer in winter and cooler in summer, making your home feel comfortable all year around. With energy prices rocketing, they’ll cut your fuel bills and carbon footprint too.

Contact us in Bristol and the South West, for further details regarding our window services and replacements.

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Energy Efficient

Various Energy-Rated Windows


All A Plus windows are energy A+ rated as standard - the highest official energy rating in the UK, and as endorsed by the BFRC (British Fenestration Ratings Council). A Plus Windows’ double-glazed units are manufactured in the UK, using the world-leading Planitherm™ high-performance, energy-efficient glass. 

Multiple Colours Available


Our foiled coloured windows come in a wide range of colours incorporating our standard Rosewood and Antique (sometimes referred to as ‘Golden’) Oak colours as well as our wide range of special foiled colours. UPVC windows do not only come in white!

You can choose from our range of 17 colours of woodgrain-effect PVCu windows. Additionally, you can select a colour on the outside and have the inside white to make your home bright and airy. These colours also apply to our conservatories.


Legislation is in place that states that from October 2010, windows installed into existing dwellings need to comply with Approved Document Part L of the Building Regulations. In order to comply, the installed products need to achieve a window energy rating Band of C or above and/or achieve an overall U value of 1.6 W/m2k. The window installation company must be able to demonstrate compliance by having its own window energy rating certification.

Our standard double-glazed casement window achieves a whole window U Value (Uw) of 1.4 W/m2.K, with a centre pane value of 1.2 W/m2.

Our triple-glazed casement window achieves a whole window U Value (Uw) of 1.1 W/m2.K, with a centre pane value of 0.76 W/m2.

Toughened, anti-shard glass is fitted where required (such as bathrooms and doors) in accordance with BSEN12150.