We sleep in a loft conversion that has one dormer window facing the garden. It is hot and stuffy and dark so we are thinking of installing two Velux windows on the sloping roof above the bed. Thing is our house is on a busy road with bus stop opposite and I am very noise sensitive. Does anyone know whether the Velux windows - when shut - would let in more noise than the roof does now? Roof fitter bloke says no, definitely not.