Ice and frost appeared on Vietnam's highest peak Fansipan, also known as the Roof of Indochina, from 8 p.m. Monday as temperatures dropped to minus degrees Celsius. A layer of frost covered the ...
A: The frost is the result of water vapor condensing. As the air in the attic cools, it can no longer hold the same amount of moisture. Cold surfaces, such as the back side of roof plywood, and any ...