Double Glazing Replacements

Sheerwater Glass are a Surrey-based glass and glazing company specialising in replacement double glazing.

We’ve been operating our glazing services for four decades. In this time we have built a reputation for a professional and reliable service to meet all manner of fenestration and glazing requirements.

If you’re looking for replacement double glazing in Surrey, Hampshire, Berkshire or Middlesex, we can help.

8557629336 Glass Accreditations

What is failed double glazing?

If you have double glazed windows that are ‘misted’ and displaying reduced visibility, this is a sign that they have failed or broken down.

Essentially, this means that the seal around the edge of the glass has failed and is allowing moisture to leak into the space between the panes of glass in your double glazed unit.

The extend of this moisture build-up will depend on how badly the window seal is damaged. You may only be able to see ‘misting’ of a double glazed unit as the light shines through the window.

As air pressure changes, the moisture inside the window builds up and water will be visible inside your windows. As well as being extremely unsightly, failed double glazing reduce visibility and effectively cause the double glazed window to become redundant.

Why does double glazing fail?

Doubling glazing should always be installed by professional glazing experts. A reputable glazing company will always assign a professional fitter to your project, providing plenty of industry experience and knowhow to ensure your double glazing is fitted correctly.

Choosing a glazing company that supplies high-quality materials will also ensure the longevity of your double glazing.

There are a number of reasons that the seal of a window breaks down, including:

  • Inadequate manufacture of the sealed unit
  • Inadequate manufacture of the framework
  • Incorrect fitting of the unit into the framework

  • There are also implications of both severe weather and harsh chemicals on double glazing.

    Our expert fitters will be able to investigate your failed window unit by removing the window from its frame. We will then be able to offer advice and guidance on future-proofing your replacement double glazing. We’ll advise you on how to clean and maintain your new windows to minimise any risk of the window seal deteriorating in the future.

    How to fix broken double glazed windows

    Unfortunately, once a window seal has been compromised and moisture has seeped into the unit, the window will need replacing.

    This usually involves removal of the window whilst keeping the framework in-tact, where possible. Glass sealed units are generally designed to be easily removed and replaced.

    Our replacement double glazing

    Sheerwater Glass have 40 years experience in glass and glazing services. Established in 1972 as a family-run Glass Shop, we have expanded our offering significantly over the years.

    We stand out against out competitors. Despite our growth and capacity to take on large scale projects, we have remained true to our family-run roots and pride ourselves on a friendly, personal service. We commit ourselves to excellent customer service; a commitment that has earned us a high rate of recommendations and referrals.

    Visit our 7818642824 to find out more about our work.

    Why Choose Sheerwater Glass?


    Our professional, expert glazing services are reliable and efficient. We’ll manage your replacement window installations from start to finish with efficiency and professionalism.

    Quality materials

    With many years of industry expertise behind us we’ve researched the very best window products that will help to prolong the life of your replacement windows as much as possible. We ensure we only supply our customers with products that we know will perform extremely well, giving them total peace of mind.


    We welcome any queries that you might have relating to double glazing, or any of our other products and services. If you need help or guidance at any point throughout your double glazing project, we’re here to help. Talk through your requirements with a member of our specialist team, and we’ll make recommendations - if required - on the best double glazing to suit your family and home.

    We supply and install a wide range of replacement windows in Surrey and throughout the surrounding areas. Whether you require replacement uPVC, uPVC timber alternative (timber effect), wood grain foiled windows, timber windows or aluminium windows. We have a huge range of materials, styles and finishes to create a truly bespoke window solution for your home.

    Our 4-step process to your replacement double glazing installations

    Double glazing installation should be easy. With the right expertise, precision, manpower, materials and project management, your window installation will run smoothly from start to finish with us.

    Our 4-step process takes you from your enquiry through to measuring up, receiving a free no-obligation quotation and installation.

    We are proud to be fully accredited and local-authority approved. Visit our main website for more information on our accreditations.

    Replacement Double Glazing | More Information

    Our friendly team are just a phone call away if you’d like to speak to us. Just call 01932 344 415.

    Alternatively, make an enquiry online by visiting our contact page, or email us at

    Follow us online

    Our glazing blog features articles, advice and industry insights into windows, doors, conservatories and much more.

    Find us on Facebook and Twitter. We regularly post photos of the work we undertake, so like and share our page and follow us to keep up-to-date!

    Glass Accreditations

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    One of our team would be happy to have chat with you about your requirements, measure up at a time that suits you and provide you a free, no obligation quote.

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    or call: 404-930-1006

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    Check to see if we work in your area

    We provide services across Surrey, Guildford, Woking, Middlesex, West Sussex and North Hampshire.

    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 has been providing employees and workforces with the skills that they need for many years, and with the seal of approval that it provides via its accreditation, companies are able to provide consumers with the confidence that they require.

    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.