Mock Sash uPVC Windows

Quality Mock Sash uPVC Windows

Charismatic and functional mock sash windows

Our quality uPVC mock sash windows are individually produced at Sheerwater Glass, offering the luxury and aesthetics of traditional sash windows without the draughts, leakage or poor security of their traditional counterpart. This modern take on the traditional sash window is available in an array of styles, colours and finishes, forming an excellent focal point for your property.

We supply both Vertical Sliding Sash uPVC windows and Mock Sash uPVC Windows. Browse our range below or contact our friendly team for advice and information on 01932 344 415.


  • Long lasting and energy efficient
  • Modern alternative to traditional counterpart
  • Available in an array of styles and finishes

Fensa Registered Company

FENSA is an acronym for the ‘Fenestration Self-Assessment Scheme’. Set up by the Glass and Glazing Federation, it allows double glazing companies to self-certify compliance with Building Regulations. There are several reasons why you should check for the FENSA logo when looking to have new windows and doors fitted in your home.

BSI Kitemark - Window Installation

Sheerwater Glass is one of only a handful of companies that has achieved the industry’s highest standard, BS 8213 for the survey and installation of windows and external door sets.

QA National Warranties

The insurance intermediary company QANW is responsible for protecting consumers through insurance policies. QANW has been in the business for over 25 years and has formed close associations with various building contractors and trade associations throughout the UK.

City & Guilds - Level 3 Qualified

The educational organisation City & Guilds are known for their vast levels of assessment, offering employees and workforces with the skills they require for many years. This seal of approval provided through their accreditation gives customers the confidence they require. Two of our employees, one in management and the other in our service department are qualified to City & Guilds level 3. This level of accreditation is highly sought after, with City & Guilds working with some of the leading brands of various sectors to offer the highest standard of training. The accreditation offered by City & Guilds is valued significantly, showcasing a business’s expertise, dedication and knowledge. In achieving this level of qualification, customers can feel assured that they are receiving the highest standard of work and customer service. City & Guilds and the City & Guilds logo are trademarks of the City and Guilds of London Institute and used under licence.

Checkatrade - Proud Members

Finding a tradesman is not always an easy task, especially when you’re unsure whether he or she is trustworthy. After all, you’ll be inviting this person into your private home, so you need make sure that they are reliable.

GQA Qualified

GQA Qualifications is an Awarding Organisation for specialist sectors and occupational roles. Qualifications cover the Glass, Construction, Coating and Print industries.

PASMA Tower Trained

Our team are fully trained in the assembling, dismantling, moving and inspecting mobile access towers and working at height.

BFRC Rated

Our products are BFRC rated, an independent verification of the energy efficiency of our windows and doors. BFRC rated energy efficient windows and energy efficient doors carry a ‘rainbow’ label.

  • shield

    Security

    Finding a window solution that you can rely on may seem like a tough task, but not with Sheerwater Glass. Our mock sash uPVC windows have excellent security features as standard, so you can rest assured your home, family and possessions will remain safe and secure. We only install high quality products, so you know you can depend on our mock sash uPVC windows. 

  • energy-efficient

    Energy Efficiency

    Our mock sash uPVC windows offer excellent energy efficiency, helping to cut the cost of your household bills. As well as keeping the warmth in during those winter months, they also perform well in summer to help keep your home just the right temperature. We only install high quality products to ensure all our customers receive mock sash uPVC windows that will continue to perform to a high standard.

  • pegasus-lock

    Innovative Technology

    We don’t believe in cutting corners. Which is why we source and install only high quality products that you can rely on. With all of our windows featuring innovative technology, there is something to suit every budget and style at Sheerwater Glass. We take pride in keeping up to date with the latest window solutions so that we can continue to offer our customers excellent products and value for money. 

Browse our range by material or by style...

We have a wide variety of colours available to choose from.


Available Colours

  • Agate Grey
    Agate Grey
  • AnTeak
    Anteak
  • Anthracite Grey
    Anthracite Grey
  • Basalt Grey
    Basalt Grey
  • Black Brown
    Black Brown
  • Brilliant Blue
    Brilliant Blue
  • Chartwell Green
    Chartwell Green
  • Cream
    Cream
  • Dark Green
    Dark Green
  • Dark Oak
    Dark Oak
  • Dark Red
    Dark Red
  • Golden Oak
    Golden Oak
  • Hazey Grey
    Hazey Grey
  • Irish Oak
    Irish Oak
  • Light Oak
    Light Oak
  • Mahogany
    Mahogany
  • Natural Oak
    Natural Oak
  • Rosewood
    Rosewood
  • Rustic Oak
    Rustic Oak
  • Sienna
    Sienna
  • Signal Grey
    Signal Grey
  • Slate Grey
    Slate Grey
  • Slate Grey Finesse
    Slate Grey Finesse
  • Steel Blue
    Steel Blue
  • Swamp Oak
    Swamp Oak
  • Walnut
    Walnut
  • White
    White
Get a Free Quote