BS 5250:2021 EXCOMM

Full Description

This revision of BS 5250 comes at a time when climate change is putting buildings underincreasing stress from moisture for two complementary reasons:

Directly, owing to increased driving rain, more frequent, deeper and longer lasting flooding, and increased atmospheric humidities.
Indirectly, through risks associated with energy conservation measures, including reduced ventilation (which, unless carefully managed, will increase internal humidity levels), and extra thermal insulation (which will make the outer layers of the fabric colder in winter). Energy saving retrofits of traditional buildings may also disturb their established equilibria with the ambient climate, and allow moisture problems to develop in the structure.

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