damp course

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  • noun

Synonyms for damp course

a course of some impermeable material laid in the foundation walls of building near the ground to prevent dampness from rising into the building

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References in periodicals archive ?
You will often be told that dampness in the base of the walls is rising dampness caused by a defective dampproof course or that there is no dampproof course.
Sub-floors such as concrete, asphalt, vinyl, quarry or similar tiled should be covered first with a plastic-film moisture barrier (a damp-proof membrane), in addition to any dampproof course that may be present in the sub-floor."
However, the work done by the builder was later examined by an expert who found that the pointing unsatisfactory and insufficiently deep, while a dampproof course was not needed.
And if there is a weak spot in the dampproof course, the water will soak up into the upper wall.
"Plus, there were several small holes where the render didn't quite match after a dampproof course was put in.
The initial thought was that the cavity tray dampproof course, set into the original side wall above the flat roof level, wasn't working and water was seeping down from the exposed upper wall and showing up on the internal lower wall.