He succeeded to the family estates in Normandy, as Sire du Ponteaudemer, Seigneur de Veulles, Pre'aux, Torville, and du Ponteaitorf, and Seigneur de Beaumont. By his marriage he greatly increased the possessions and prestige of the family, and he rose to be one of the most powerful feudal noblemen of his age in Normandy. When William the Conqueror invaded England in 1066, Roger furnished sixty armed vessels for the fleet. He was left in charge of the government of Normandy by the Conqueror. He endowed the Abbey of Pre'aux, where late in life he became a monk.