weather back
Any application to or treatment of the back of a wall to render it more impervious to wind or water, as back plastering, coats of tar or asphaltum, layers of sheathing paper, etc. (Sturgis, 1900)
Any application to or treatment of the back of a wall to render it more impervious to wind or water, as back plastering, coats of tar or asphaltum, layers of sheathing paper, etc. (Sturgis, 1900)