If a light has buckled, glass has broken, or the lead cames are showing signs of corrosion, contact a professional stained glass artist with conservation experience for advice.
Os yw ffenestr wedi byclu, os yw gwydr wedi torri, neu os oes arwyddion o rwd ar y rhimynnau plwm, cysylltwch ag artist gwydr lliw proffesiynol sydd â phrofiad ym maes cadwraeth i gael cyngor.