Pasteboard (strawboard or juteboard) may be used for the roof.
The strawboard also takes the place of wood-pulp for smaller paper boxes.
The cheapest grade is the strawboard, for which there is no place in library work.
A piece of wood can then be glued on to the strawboard along the pencil line at the back and another at the end.
Barrels or boxes of wood, or strawboard lined with water-proof paper, should be used in packing for shipment.