Please click on the logos to visit the relevant website       Charlesworth Northern have been trained and certified by Polyroof, who also regularly inspect our work to ensure it remains at their exact specifications.         The products installed by Charlesworth Northern have been tested by the British Board of Agrément and are a holder of agrement certificate No 90/2604. If you wish to inspect the particulars of this certicate contact the BBA via their information line 01923 665400.         Charlesworth Northern are registered with the United Kingdom Register of Qualified Construction Services. Constructionline qualify firms with the skills and expertise they need to work on public sector projects.       The quality administration systems of Charlesworth Northern have been assessed and approved by QMS Quality Management Systems Ltd to the following quality administration systems, standards and guidelines:- BS EN ISO 9002:1994