On 10/03/2020 14:25, Bert Coules wrote:
Andy Bennet wrote:

An IR camera works - different thermal characteristics of the morter v
the blocks.

Thanks very much for that.Â* Am I right in thinking that it would be
necessary to remove any obstacles such as shelves, empty bookcases and
the like away from the wall to get a meaningful result?

And experiment with the heating of the room and waiting before
examining. You will also need a camera where the thermal window can be
adjusted (you may only want to look at temperatures, say, between 15 and
30C and have these displayed as full scale so that you can see minor
temperature differences.

It may not tell you much if the wall has been subsequently
plaster-boarded and then skim plastered etc.







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