Granada is a specialist designer, manufacturer and installer of aluminium secondary glazing. Our discreet internal windows le ... ad the fight against noise pollution, whilst delivering improved building energy performance and efficiency. As the UK's largest manufacturer of secondary glazing, we support a huge variety of award-winning construction and renovation projects – specialising in heritage and listed buildings. This considerable experience is backed up by accreditation from both the Achilles Building Confidence and Constructionline schemes, in addition to longstanding BBA, CHAS and ISO 9001 awards. read more