tarpaper

[tahr-pey-per]

noun

a heavy, tar-coated paper used as a waterproofing material in building construction.

Origin of tarpaper

An Americanism dating back to 1890–95; tar¹ + paper

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

The walls will be of shiplap, covered with matched siding, with tarpaper between.
Neighbours
Robert Stead
Outside, the rain fell in great silvery sheets, so that the noise on the tarpaper roof of the barracks was almost deafening.
Three Soldiers
John Dos Passos
The roof will be of two thicknesses of boards, bent to a gentle oval over a stout ridge-pole, and again with tarpaper between.
Neighbours
Robert Stead