Regulation on classes of performance in relation to air permeability for rooflights and roof hatches

This regulation sets specific performance classes for how air leaks through rooflights and roof hatches. By establishing these technical standards, the EU ensures that building components are energy-efficient and consistent in quality across the single market.

This affects manufacturers of construction products and building contractors. It ensures that roof installations meet minimum air-tightness requirements to improve energy efficiency in buildings.