The first issue of AJ Focus, the replacement for "Products in Practice" examines in detail windows and glazing . Commences with a case study in which R.Wilcock looks at the construction of the curtain glass walling at Blackburn leisure centre and an entrance canopy which uses a standard glazing system at the Holywell Sports Centre ; S.le Roith describes how his team chose the glass for the Lloyd`s building in the City of London; B.Keyworth describes improvements in timber windows and D.Button advises on glass specification with a table detailing characteristics of different windows; the design data section analyses in tabular form the basic types of glass used in construction, the types and performance of solar control glass and sizes for sealed double glazed units ; a comparison is given of life cycle costs of different windows over a 30 year period prepared by Davis Belfield and Everest ; concludes with sources of information.