Rasukatto (ラスカット) – n – literally “lath-cut” in a Japanese accent. Rasukatto is structural plywood with an initial layer of water-resistant membrane over which there is a rough cement-based layer to which mortar, plaster, stucco, etc, can be applied. Caulking is used to seal all joints, after which one of the above finish materials are typically applied.

Exterior Rasukatto Wall Base

Mortar over Rasukatto

Rasukatto with Joints

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