Doors to rooms that you have to pass to get to an exit from your property, with the exception of bathrooms and toilets, should provide 20 minutes fire resistance.
Dylai drysau i ystafelloedd y mae'n rhaid i chi fynd drwyddynt i adael eich eiddo, ac eithrio ystafelloedd ymolchi a thoiledau, allu gwrthsefyll tân am 20 munud.