damp course question

[Softus]

Chlorides, sulphates, and nitrates, and they come up from the ground with the moisture, ie rising damp.
The levels of the various salts can easily be checked by a lab analysis.
There are varying degrees of each of these in different parts of the country.

Thanks.

Why?

You know me - I'm just collecting information.

 

[noseall]

below the dpc, the cavity might be filled with concrete.

That would be a poor method of construction, and isn't the type of bridging I had in mind.

all cavities should be filled with lean mix concrete to within 225mm of the dpc. in other words 75mm lower than external ground level.