damp course

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damp course

[¦damp ‚kȯrs]
(civil engineering)
A layer of impervious material placed horizontally in a wall to keep out water.

damp course, damp check, dampproof course

In masonry, an impervious horizontal layer of material (as tile, dense limestone, metal, etc.) to prevent the capillary entrance of moisture from the ground or a lower course, but used also below copings, above roof level in chimneys, and elsewhere to stop downward seepage.
References in periodicals archive ?
Here the damp from the ground simply bypasses any built-in damp-proof course and soaks across the wall.
Please remember it isn't either or, damp-proof course or plaster, it's both and don't try to save money by not doing the plasterwork.
A normal damp-proof course is fitted just above ground level and its sole purpose is to stop dampness rising out of the ground and into the building.
The idea is that any water soaking through the outer wall drains down into the foundations or is stopped by a damp-proof course, then channelled back out through the wall to the outside.
If in doubt, you should replace the damp-proof courses before you reset the window.
These precautions include slotting a damp-proof course into the junction between the two leaves of walling to provide an effective barrier which prevents the water soaking from the outside to the inside.
The window frame should be fixed into the opening behind this damp-proof course or at least overlapping it.
Traditionally, windows and doors were all set back at least 75mm (3in) to bridge the damp-proof course.