A person who thatches roofs with straw or reeds to create a waterproof covering.
From Old French 'chaume' meaning straw or thatch, derived from Latin 'calmus' (reed). The suffix '-er' denotes one who performs the action.
Medieval roof thatchers were essential village workers—a good chaumer could make a cottage weatherproof for decades, and their skill was so valued that different regions developed their own distinctive thatching styles.
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