Term: Trough-roof (logging)
A roof on a logging camp or barn, made of small logs split lengthwise, hollowed into troughs and laid from ridge-pole to eaves. The joints of the lower tier are covered by inverted troughs. View more information about logging elsewhere at wisconsinhistory.org
View pictures relating to logging at Wisconsin Historical Images.
[Source: Sorden, L.G. and Isabel J. Ebert. Logger's Words of Yesteryears. (Madison, 1956)]