In this case, the antenna should not stick out more than 60 centimetres above the highest part of the roof, or above the highest part of the chimney stack, whichever is lower.
Os felly, ni ddylai’r antena ymestyn mwy na 60 centimetr uwchlaw rhan uchaf y to, neu uwchlaw rhan uchaf y corn simnai, pa bynnag un sydd isaf.