Slimline Windows

Sheerwater Glass supply and fit Slimline Windows throughout Surrey and the surrounding areas.

Slimline Windows are exclusive to Sheerwater Glass

Combining the performance of casement windows with spectacular design, our slimline range has a low proportion of frame to glass. This results in a sleek and impressive window, ideal for both modern and traditional properties.

With the opportunity to tailor your new windows to suit your home, our team of experts can help you to design and execute a truly bespoke window project.

Our installation service is carried out by a team of expert installers with wide ranging experience in window installation.

Our friendly team are available to answer any queries you have. Call us today on 01932 344 415 or visit our contact page.

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.

  • a+energy

    Energy Efficiency

    Awarded an energy index rating of A+, our exclusive slimline windows are extremely energy efficient. This impressive energy rating ensures that your home stays warm and dry, cutting the cost of your household bills while your home remains warm and cosy. With a low proportion of frame to glass, our exclusive slimline range are as energy efficient as they are impressively designed.

  • shield


    A multi-point, shootbolt locking mechanism makes our Slimline windows exceptionally safe. We source and install only the highest quality products and materials, giving you that peace of mind that your home and family are safe and secure. We don’t cut corners, which is why we don’t compromise on safety when it comes to our exclusive Slimline window range.

  • custom design

    Bespoke Design

    Undergoing a new window project can be incredibly exciting! Our team of glass and glazing experts are on hand to help you find the perfect bespoke window design to suit your property’s style. Tailor your new Slimline windows to create a flawless, contemporary look. Our exclusive Slimline windows are available in a range of colours to suit every property, whether modern or traditional.


    Exclusive to Sheerwater Glass

    You won’t find our Slimline UPVC Windows anywhere else. With an outstanding finish, variety of colours, fantastic security and energy efficiency, they are unparalleled. Our friendly team are just a phone call away to help you find the perfect Slimline window solution to suit your home.

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
  • Anthracite Grey
    Anthracite Grey
  • Basalt Grey
    Basalt Grey
  • Black Brown
    Black Brown
  • Brilliant Blue
    Brilliant Blue
  • Chartwell Green
    Chartwell Green
  • 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
  • Natural Oak
    Natural Oak
  • Rosewood
  • Rustic Oak
    Rustic Oak
  • Sienna
  • Signal Grey
    Signal Grey
  • Slate Grey
    Slate Grey
  • Slate Grey Finesse
    Slate Grey Finesse
  • Steel Blue
    Steel Blue
  • Swamp Oak
    Swamp Oak
  • Walnut
  • White
Click to view additional information

Technical details of our Slimline uPVC Casement Windows

Did you know…

  • Windows account for up to 30% of your home’s total heat loss, contributing to increasing energy fuel costs. Which is why it is important for you to choose an energy-efficient double glazed window.
  • The minimum “Window Energy Rating” (WER) required of all windows, in accordance with current legislation, at this time is a ‘C’. Each WER rating (A, B & C) has varying degrees of standards.
  • These variances are highlighted by testing authorities providing tested windows with an Energy Index. The higher the Energy Index number, the more efficient the window is at retaining generated heat.

Our exclusive Slimline Window

  • The Sheerwater Glass Slimline Window has undergone vigorous testing by ‘BFRC’. Awarding our window with an Energy Index of +11. This proves how energy efficient the Sheerwater Glass Slimline Window is in comparison to other leading brands.


  • Security is of great importance to you, your home and your family. So rest assured in the knowledge that Sheerwater Glass Slimline Windows are fitted with Trojan multi-point, shootbolt locking mechanisms. We are very proud to announce that this locking mechanism has achieved a BS7950 status.
  • Our Slimline Windows are also fitted with security glazing to prevent the intact removal of glass units, along with hinge protection, as standard features of the product. Nothing is impregnable but our Slimline Window has foiled all attempts of forced entry (excluding the breakage of glass) that we are aware of to date.
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