E & S W Knowles are an Industry leading manufacturer and supplier of internal doors solutions and joinery since 1923. Special ... ising in fire, acoustic and security doors in an extensive range of high-quality finishes and styles. Throughout the generations of the Knowles family, we have continuously developed to suit the needs of the construction industry. We now offer products that are FSC certified, this non-profit organisation works to promote the sustainable management of the world’s forests. Sustainable materials are important to us as ever-growing concerns over sustainability shape the world of British and European manufacturing. read more