National Association of Rooflight Manufacturers Code of Practice All Full and Associate Members of the National Association of Rooflight Manufacturers are: Focussed on quality and have obtained, or are working towards, BS EN ISO 9001:2000 Registration. Committed to staff training and development. Able to offer balanced advice on the use of rooflights, rooflight materials and rooflight systems without misrepresentation. Dedicated to customer satisfaction through the development and supply of quality rooflights, rooflight materials and systems. Supplying only those products which comply with relevant UK and European Standards and Building Legislation. Promoting good business practice and publish clear statements on terms of sale and product warranties.