If you want to carry out repairs on or re-cover less than 25 per cent of the area of a pitch or flat roof, you will not normally need to submit a building regulations application.
Fel rheol, os ydych am atgyweirio neu ailorchuddio llai na 25 y cant o arwynebedd to ar oleddf neu do gwastad, ni fydd angen ichi gyflwyno cais o safbwynt rheoliadau adeiladu.