These are detailed documents drawing on knowledge and experience from within NARM’s influential Technical Committee, as well as independent research.
NARM NTD01.3
An introduction to natural daylight design through rooflighting: A broad based guide to factors affecting rooflight specification in all building types
Updated November 2021
NARM NTD11
Understanding the differences between ‘non-fragile’ rooflights and ‘walk-on’ rooflights for deliberate foot traffic
