ISO 9001 & ISO 14001

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FM 37264                     EMS 515017


Crittall Windows operates a Quality Management System which complies with the requirements of BS EN ISO 9001

The ISO 9000 series Standards 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 the systems accordingly.

A copy of the Quality Policy is available upon request.

Crittall Windows operates 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.


Fensa – Crittall Windows

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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.

Construction online

Constructiononline – 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.

The Contractors Health and Safety Assessment Scheme

CHAS – Crittall Windows


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


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