DPC Problem

[Harry Bloomfield]

No idea what you are trying to say .

But
hygroscopic

1. (of a substance) tending to absorb moisture from the air.
   • relating to humidity or its measurement.

Moisture from below gound, is (often) prevented from rising up through brickwork, by a DPC. If that DPC is bridged, by a material such as mortar, or plaster, or failure of the DPC - the moisture can be drawn to bypass the DPC. Often that is described as 'rising damp'. I myself, have a tiny issues, where there is some 'rising damp', which needs addressing.

 

[foxhole]

Moisture from below gound, is (often) prevented from rising up through brickwork, by a DPC. If that DPC is bridged, by a material such as mortar, or plaster, or failure of the DPC - the moisture can be drawn to bypass the DPC. Often that is described as 'rising damp'. I myself, have a tiny issues, where there is some 'rising damp', which needs addressing.

What draws the moisture up? certainly not gravity.

 

[Harry Bloomfield]

What draws the moisture up? certainly not gravity.

I'm sure you know, or ought to know, capillary action. Dip the corner of anything absorbent, like plaster, cloth, or etc. in water, and the moisture will be drawn up to wet the rest of the item.

Capillary action - Wikipedia

en.wikipedia.org

 

[foxhole]

I'm sure you know, or ought to know, capillary action. Dip the corner of anything absorbent, like plaster, cloth, or etc. in water, and the moisture will be drawn up to wet the rest of the item.

Capillary action - Wikipedia

en.wikipedia.org

Bricks are not absorbent, stick one in an inch of water and wait for the water to rise to the top, it never will [an experiment doing just that was used to test the theory of rising damp, every common brick in use was soaked for 2years, zero rising damp observed]

 

[Harry Bloomfield]

Bricks are not absorbent, stick one in an inch of water and wait for the water to rise to the top, it never will [an experiment doing just that was used to test the theory of rising damp, every common brick in use was soaked for 2years, zero rising damp observed]

However, I never mentioned moisture rising up via the bricks, but rather through mortar and plaster. However2 - why do you suppose they include a damp course at all in a building?