Hazlemere Window Company Limited is ISO 9001:2015 registered and this underpins their entire approach to client servicing and business management. Hazlemere Windows are also Constructionline Gold accredited for Health & Safety, plus are Members of the Glass and Glazing Federation.

In addition, Hazlemere Commercial is an EXOR accredited contractor, holds the Contractors Health & Safety Accreditation (CHAS), is Constructionline Approved, and is an approved supplier of the London Housing Consortium (LHC). Hazlemere are also accredited to ISO 14001 for waste management and have been members of FENSA since its conception in 2002 (FENSA membership number 10589). Whats more, Hazlemere Window Company Ltd are "Authorized and Regulated by the Financial Conduct Authority".

Hazlemere are Certified as compliant with the British Standards Institute (BSI) window energy rating scheme. In 2007 Hazlemere became the first UK company to design, manufacture and install an aluminium "A" rated dual frame window under the British Fenestration Rating Council's (BFRC) window energy rated scheme (WER).

Hazlemere Commercial’s installation at Lane End School, Bucks, won the Quantal 2008 Commercial Installation of the Year Award (Education Sector Category). Hazlemere Commercial Windows and Doors are also the proud holders of an RICS award in connection with the prestigious Yamanouchi-led design and construction of replacement fenestration at Littlemore Park Hospital, Oxford.

In 2010 Hazlemere Commercial designed, manufactured, supplied and fitted £2.4m worth of aluminium windows, doors and curtain walling for the award winning £44m sustainability redevelopment of Bideford College in Devon.

In 2011 Hazlemere Commercial undertook a £1.7m refurbishments of River Gardens residential blocks by the River Thames in Fulham, next to Craven Cottage. In 2012 Hazlemere Commercial replaced every single single glazed window at County Hall in Aylesbury for Buckinghamshire County Council with £2.3m of specially designed bespoke aluminium tilt in windows to enable them to be cleaned from the inside. In 2013 Hazlemere Commercial replaced £2.5m worth of casement aluminium windows with Sapa aluminium windows at Merton Civic Centre in Morden, completing the project in the Spring of 2014. They were also awarded several school fenestration refurbishment contracts by Hampshire County Council.

On 22nd April 2015 Hazlemere became members of the Glass and Glazing Federation, since which one of their Directors, Mark Austin was twice elected as Chairman of the GGF Windows and Doors Group, and is currently the GGF President and Chairman of the Group GGF Board.

FENSA Registered Installers

Hazlemere Window Company Ltd have been members of FENSA (Hazlemere's FENSA Registration No. is 10589) since it's inception in 2002. FENSA is the leading body providing homeowner protection in the double glazing industry for double glazed windows and doors. You can contact FENSA to confirm Hazlemere Window Company's credentials by calling FENSA on 020 7645 3700 or by visiting

ISO Quality Management Systems

Quality Policy and ISO 9001:2015 Accreditation

The company has produced a Quality Manual containing detailed mandatory systems & procedures to ensure compliance with its ISO 9001:2015 registration.

Together with elements of our Mission Statement, these form the backbone to our company Quality Policy, which is:

In order for our company to maintain its current market position and build upon the strong foundations already laid, we shall:

  • accurately assess the requirements of our customers regarding our provision of products and services, and strive to exceed their legitimate expectations wherever possible
  • use our systems and procedures as a team, in order to always provide quality products that are delivered on time and to the complete satisfaction of our customers, and in strict accordance with all statutory and legislative requirements
  • recognise that the company is a single entity, with no single person or department having greater importance than any other person or department; and that everyone contributing to the company’s success, at whatever position they hold, is a valued asset
  • maintain sufficient levels of profitability to secure our future stability, thereby providing long-term job security for everyone associated with the company
  • provide a harmonious balance between work and home life for everyone contributing to the company’s success

In order to achieve these objectives, our Quality Policy and all supporting procedures, systems and resources, as enshrined in our Quality Manual, are regularly reviewed at top management level as part of our commitment to continual improvement.

Finally the above Quality Policy also forms the basis of all staff development and training reviews, which are conducted regularly.

Glass and Glazing Federation Members

The Glass and Glazing Federation (GGF) is a Government approved body who exists to assist both UK homeowners and their members. The GGF represents over 60% of the home improvement industry by turnover. The GGF's opinion is also regularly sought by Government on Regulation and Consumer issues.

Seven Reasons why you should use a GGF Member

1. Deposit Indemnity Scheme

Deposits placed with GGF Members who were also paid up members of the GGF Fund Ltd up to 31st March 2020 are protected by the GGF's independent Deposit Indemnity Scheme, which up to that date safeguards deposits up to £12,500 or 50% of the contract price, whichever is lower. Hazlemere Windows also provide every windows and doors customer with a ten year IBG (Insurance Backed Warranty) as part of their package which is underwritten by the Glass and Glazing Federation. From 1st April 2020 customers are strongly advised to pay any deposit by creditcard or via a credit finance agreement under section 75 as of 31st March 2020. Please check for yourself, but under Section 75 of the Consumer Credit Act 1974, the credit card company and/or credit finance company is jointly and severally liable for any loss of deposit up to a maximum of £30,000 if the company no longer exists.

2. All Companies are Vetted

All our Members who supply, fit or install replacement windows, double glazing, Energy Efficient windows, doors and conservatories have been trading for at least three years and are vetted to ensure quality of service: this vetting process includes making a site visit to the company's premises, checking two years of their accounts and taking up trade and consumer references.

3. Companies work to a GGF Code of Good Practice & the GGF Glazing Manual

All our Members work to the Glass and Glazing Federation's Code of Good Practice and to the Technical Standards laid out in the GGF Glazing Manual.

4. Customer Charter

GGF has a Customer charter offering consumers:

  • advice on where to buy
  • advice on what to buy
  • safeguarding of purchases
  • quality service at all times
  • continued customer care.

5. FREE Conciliation Service

The GGF also provides a FREE Conciliation Service, should a domestic customer and a Member company not see eye to eye over work carried out. In the rare cases that this does not work, the GGF has an independent arbitration scheme run by the Chartered Institute of Arbitrators.

Note: The GGF has no authority regarding compensation, and so we are unable to provide assistance on this issue. In addition, we are an independent third party and will not be drawn into litigation between the customer and the Member. Consequently if litigation was being used, or threatened then we could not intervene.

6. Conduct is monitored and regulated

The Glass and Glazing Federation monitors and regulates the conduct of its Members to ensure that customers are treated fairly.

7. Your installation will comply with the Building Regulations

All GGF Members will comply with the Building Regulations when replacing your windows and doors, this includes ensuring safety glazing is installed in critical locations as well meeting the thermal performance requirements for the replacement products. All replacement windows and doors installed within England and Wales need to be registered; this can be done in a number of ways - through registration with a self-certification scheme such as FENSA or through your Local Building Control. A certificate of compliance will be issued, this is required whenever there is a legal transfer of the property by your solicitor.

One of Hazlemere Window Company Ltd's Directors, Mark Austin (who signed up to work at Hazlemere back in 2007), in 2018 was elected by the GGF Home Improvement Executive to be the GGF Vice-President. He was subsequently also then elected as the Glass and Glazing Federation President and GGF Board Chairman and served from 1st January 2020 to 31st December 2020. Both roles were totally voluntary, with no remuneration payable.

Hazlemere Window Company Ltd is Authorised and Regulated by the Financial Conduct Authority

Following a detailed submission to the Financial Conduct Authority for full FCA approval back on 14th December 2017, the Financial Conduct Authority granted Hazlemere Window Company Ltd full authorized approval on 2nd March 2018.

Hazlemere Window Company Limited is therefore officially “Authorized and Regulated By the Financial Conduct Authority”. This enables the company to offer consumers Credit Finance via an FCA approved Credit Finance Provider.

Find out about the Credit Finance options offered by Hazlemere Window Company Ltd via Hitachi Personal Finance

National Federation of Glaziers Members

The National Federation of Glaziers (NFG) was founded in 1991 to promote best and fair practice in the United Kingdom Glazing Industry, and is a Trade and Consumer Federation. As it states on the National Federation of Glaziers website all "members are thoroughly vetted before acceptance and may be relied upon to provide proper and professional advice on all aspects of glazing, and to carry out glazing work to the highest standards."

The National Federation of Glaziers offers advice on all aspects of the glazing and glass, including Codes of Practice, difficulties with payments, installations, contracts etc. to both the general public and its Members. Hazlemere Windows became Associate Members of the NFG in July 2017.

The National Federation of Glaziers updates its members with up to date information on legislation and regulations and requires each of its members to comply with its Code of Installation Practice in full as a condition of being National Federation of Glaziers members.

British Standards Institute (BSI)

The British Standards Institute (BSI) set up Kitemark Window Energy Ratings in 2010 in additional to the existing Window Energy Ratings Scheme previously established by the British Fenestration Rating Council (BFRC).

Under either scheme double glazing and triple glazing systems manufacturers and suppliers are able to apply to join if they can fulfil stringent criteria, to ensure that the products they supply and fit confirm to the current Building Regulations, and are given an accurate independent rating.

BSI Kitemark Window Energy Ratings is therefore a third party product certification scheme which results in the certification of the energy rating of a double glazing manufacturers windows. In order for any particular combination of window frame, system, polyamide strip, gaskets and glazed sealed unit to receive an energy rating the manufacturer must a) obtain simulations from a BSI accredited simulator and b) demonstrate their ability to manufacture the windows defined by the simulations by controlling the supply of components and fabrication processes. This is enforced by continuous independent assessment by a BSI assessor every 6 months.

BSI simulations define the potential thermal performance of the window, taking into account the U value of the materials used, the solar gain (g value) and air leakage of the window design.

Hazlemere Window Company Ltd were awarded their BSI Kitemark Licence in 2010 in respect of Window Energy Ratings. Their Kitemark Licence Number is KM 566333 and each Hazlemere Windows customer who have double glazing or triple glazing installed by Hazlemere receive a BSI Certificate for their particular combination of products stating its Window Energy Rating (A, B or C).

Window Energy Ratings (WER's)

The British Fenestration Rating Council (BFRC) and British Standards Institute (BSI)

Window Energy Ratings or WER's were introduced by the British Fenestration Rating Council (BFRC) as an independent means of determining the performance of double glazed and triple glazed windows, to ensure that both UK property owners, builders and developers installed high performance fenestration products that do conform to the Building Regulations in England and Wales as required by law. 

The A-G rating system was first introduced last decade, before the substantial changes to the Building Regulations on 1st October 2010 when the minimum standard for a replacement or new build window was a Window Energy Rating of "C". Similar to the energy rating for fridges and freezers WER's are a trustworthy guide for consumers as to the energy performance of a product. 

In 2007 Hazlemere became the first company in the UK to design, manufacture, supply and install a dualframe aluminium green window system that achieved an ‘A’ Window Energy Rating. Their products use the latest, state-of-the-art materials to ensure they provide homeowners with the best, most technologically advanced thermally efficient, energy saving, environmentally friendly windows. 

Hazlemere's Eco-friendly energy rated windows (aluminium and UPVC) systems have previously been endorsed by the Energy Saving Trust and the British Fenestration Rating Council and are now endorsed by the British Standards Institute, and all achieve the equivlent a WER of ‘C’ or above, so customers can be assured it will offer superb thermal performance that will help them save energy and money on their heating bills.

Pilkington energiKare

Pilkington Glass manufacture high quality float, toughened and laminated glass to enable the double glazing industry to produce energy saving windows and doors.

Aluminium and UPVC windows using Pilkington energiKare are all rated C or above by the British Fenestration Rating Council as they significantly reduce the amount of energy you use to heat your home. When you are choosing replacement aluminium or UPVC windows, products that carry the Energy Saving Recommended logo (an Energy Saving Trust initiative backed by Government), such as those containing Pilkington energiKare, have achieved a Window Energy Rating C or above. Aluminium or UPVC windows carrying the Energy Saving Trust Recommended logo confirm that they particularly energy efficient, and that the double glazing installer has adhered to strict guidelines.

Energy Saving Trust

Hazlemere Window Company Ltd and the Energy Saving Trust

The Energy Saving Trust was formed in 1992, the same year High Wycombe based Hazlemere Window Company Ltd set up it's commercial windows, doors and curtain walling division. The Energy Saving Trust is at present a not-for-profit company limited by guarantee.

The Energy Saving Trust's "mission is to find the best ways to change people’s behaviour and to introduce energy-saving measures into homes." They do this "by providing expert insight and knowledge about energy saving, supporting people to take action, working with business, government, local authorities and others to drive improvements in the energy-saving market, and by providing quality assurance for goods, services and installers."

According to the Energy Saving Trust, nearly a fifth of heat lost from un-insulated homes is through the windows. Investing in Hazlemere’s heat saving windows will make a significant contribution to reducing this, which in turn helps to keep your home warmer and saves you money as well.

Make your house a home! Let Hazlemere take care of it for you – get in touch with us today and see how we can help.

Get a free quote

or call us today on 08000 825 825.

Customer Reviews


Find your nearest Hazlemere showroom

Request A Quote Request a brochure DESIGN YOUR NEW DOOR

© 2021 Hazlemere Window Company Ltd.

Credit is subject to status and affordability. Terms and conditions apply. Finance on windows & doors is available to a maximum loan value of £50,000 with zero deposit. Finance on conservatories is available to a maximum loan value of £30,000 with a 15% deposit. £1,000 minimum order value applies to all finance options. Authorised and regulated by the Financial Conduct Authority. Hazlemere Window Company Limited (VAT No. GB 135 5828 01) at Cressex Business Park, Wellington Road, High Wycombe, Buckinghamshire HP12 3PR (Financial Services Registered No. 796507) is a credit broker and is authorised and regulated by the Financial Conduct Authority. Credit provided by Hitachi Personal Finance, a trading style of Hitachi Capital (UK) PLC, authorised and regulated by the Financial Conduct Authority (Registered No. 704348).