Absolutely nonsense I had guy come refused wear mask because hes hot!!@ I made complaint landlord They now all wear mask stay out our way,my husband shielding. The landlord said did speak staff disciplined them. That none contractors exempt, They only hire ones able comply covid restrictions. You can phone agency ask workman who will comply giv build safety covid guidelines. Mask is mandatory in someone's home exempt doesn't apply due to health safety gov legalisation.