damp-proof

A damp-proof course has been introduced consisting of a thin sheet of lead sandwiched between layers of asphalt.

This is accomplished by putting under the foundation a solid bed of concrete, and under the foundation walls damp-proof courses.

Joan looked up from the damp proof sheets of the society layout for Sunday.

The good points of concrete are manifold; it forms a strong, fire-resisting, and damp-proof structure.

The base of the cavity should be taken down a course or two below the level of the damp-proof course.