ISO 9001 & ISO 14001

Crittall Windows operates a Quality Management System compliant with BS EN ISO 9001 requirements.

The ISO 9000 series standard is an internationally recognised quality management system requirement developed by the International Organisation for Standardisation (ISO). ISO9001, the most comprehensive Standard in the ISO 9000 series, covers design, manufacturing, and installation systems.

Crittall’s modern ISO 9001 certified factory is unparalleled in its engineering and production capacity.

Crittall was one of the earliest manufacturing concerns to obtain ISO certification and has continuously maintained and upgraded systems accordingly.  A copy of the Quality Policy is available upon request.

Crittall Windows operate within the constraints of a recognised international environmental management system ISO 14001 and set targets on solids, liquids, gaseous emissions and waste generation.

Crittall reviews its key suppliers and contractors and record the results on the register of approved suppliers and contractors.

Crittall makes a commitment to continual improvements of its products, processes, services and environmental effects and provide them in a manner which protects human health and the environment.  A copy of the Environmental Policy is available upon request.

Constructionline Gold

Constructiononline Gold – Crittall Windows


Constructionline is the UK’s leading procurement and supply chain management service that collects, assesses and monitors standard company information through a question set that is aligned to PAS 91 (Standard pre-qualification questionnaire developed by BSI to reduce duplication within the construction industry).

The aim of Constructionline is to provide efficiency savings to public and private sector buyers and the construction industry as a whole through streamlining procurement procedures and improving the supply chain management processes by reducing risk, creating cost efficiencies and helping buyers engage with new suppliers, including SMEs and local companies.

Crittall hold a Constructionline Gold Membership as of 2018. Gold status is now demanded as a pre-requisite to securing work by an increasing number of large and medium-size contractors.

Made In Britain


Made in Britain brings together the British manufacturing community, united with the use of the registered collective mark. The mark is protected and can only be used by members of Made in Britain that meet the criteria set to guarantee the member is a British manufacturer.

Crittall have been manufacturing in Britain for over 170 years, maintaining a true British heritage, reinforced by Made in Britain.

The Contractors Health and Safety Assessment Scheme

CHAS – Crittall Windows

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CHAS is the Contractors Health and Safety Assessment scheme which has been in operations since 1997 with the aim of improving health and safety standards across Great Britain

CHAS assesses applicants:

  1. Health and safety policy statement;
  2. Their organisation for health and safety;
  3. Their specific health and safety arrangements to a standard acceptable to our buyers and to others.

Therefore having a CHAS accreditation provides assurance that the core health and safety policies are complied with.

Builder’s Profile

Builder’s Profile – Crittall Windows

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Builders profile is an open-access common database service providing compliance and PQQ information to the construction industry.

The Builder’s Profile addresses the costs, complexities and communication overheads of multiple PQQs. Subscribers use a common database, the construction-industry standard that also integrates with and complements any: main contractor, Audit Partner or Industry Procurement & Supply Chain Management service.

Photography: Manolo Llera, Courtesy of Selldorf architects


Fensa – Crittall Windows


You can be assured that an installation by Crittall Windows Ltd meets the UK Government Building Regulations.

Crittall Windows Ltd is registered with FENSA – the most successful of all competent person schemes in the UK, across all industries.

FENSA stands for the Fenestration Self-Assessment Scheme. It has been set up by the Glass and Glazing Federation (GGF), and other industry bodies, with government approval, in response to the changes to the building regulations for England and Wales

From 1 April 2002, all replacement glazing in dwellings came within the scope of the Building Regulations. From that time, anyone who installs replacement windows or doors has to comply with improved thermal performance standards.

FENSA enables companies that install replacement windows and doors to self-certify compliance with Building Regulations.

When having their windows and doors replaced, homeowners must ensure that they get a certificate from Local Authority Building Control, or have the work completed by a FENSA registered company.


NBS – Crittall Windows

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Royal Institute of British Architects, Continued Development Programme

RIBA – Crittall Windows

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RIBA CPD assists professionals working in the design disciplines to manage their own development of skills, knowledge and experience on an ongoing basis. RIBA-approved CPD material from members of the RIBA CPD Providers Network has been rigorously assessed by the RIBA .

Crittall has launched two RIBA-approved CPD (Continuing Professional Development) modules aimed at architects and designers. One presents ‘A strong case for specifying exterior steel windows and doors’, while the other addresses ‘Inspirational interiors – specifying steel partitions and screens.’

As the world’s longest established manufacturer of steel windows, with a history dating back to 1849, Crittall is in a unique position to impart detailed information about the use of steel fenestration and its continued evolution to meet exacting modern glazing requirements while offering design solutions across all market sectors and relevant to both restoration of historic buildings or state-of-the-art new build.

The prestigious RIBA CPD Providers Network logo may only be used by Network members who have RIBA-approved CPD material.