Inglasade balkonger - Definitioner och möjligheter

Sammanfattning: This report is about glazed balconies and intends to answer following questions: • Does glazed balconies have a “grey area” – i.e. is it free for interpretation? • Are better definitions for glazed balconies and its aspects needed? • Can our research expand the possibilities with glazed balconies from an aesthetic and practical view? The report will be processing different types of definitions and how it works today in practice and in standards. The purpose is, through surveys of different aspects concerning definitions, create an entrance for expanding the possibilities with glazed balconies and figure out if clearer definitions are needed. The aspects which will be investigated are mainly fire safety, area measurements, economy and daylight. A case provided by Fojab Architects has been used to apply certain investigations. The case consists of a glazed balcony with a folding wall in glass that faces the balcony. To investigate the fire aspect has some fire departments in Sweden answered our questions, and requirements and designs regarding fire requirements have been studied. Area measurement is largely due to definitions, and actors such as certified area surveyors and property developers have been interviewed as to whether the area for a glazed balcony should be measured as BOA (1) or BIA (2) according to Swedish Standard. Economic aspects is taken into account, the difference between condominiums and rented flats with balcony glazing. Is it beneficial for the developer to always build balconies with a glazing from a financial point of view? A comparison to other reports of the value of balconies is performed and put in the context of the market prize for a balcony. Also daylight calculations are performed, as today’s standard is from the 1980’s. With help from the program Velux daylight visualizer a comparison between our case, with a folding wall in glass, and existing standard balconies is done. The survey shows that a balcony according to the case study, i.e. with a folding wall in glass towards the balcony, meets the requirements with a larger margin than a traditional open balcony with a balcony door and a window in the facade wall to the balcony. The conclusions are: • The term “glazed balcony” is undefined and are an area free for interpretation. • A balcony can be measured and defined as BOA1 or BIA2, which means that it can be insulated and still be named as “balcony”. • The boundary when a balcony is defined as a room is up to the one that measures the area. • With the balcony we examined the daylight factor meets todays requirements up to 50 % shielding angle, a higher value than a standard glazing. • To get an unified view of what a glazed balcony is, there is need for a more specified definition. (1) BOA consists of spaces above ground set up for accommodation. (2) BIA consists of spaces set up for side functions for accommodation and for spaces fully or partly under-ground set up for accommodation.