Overboarding Lime Walls

[keyplayer]

There's no shortage of advice hereabouts regarding the folly of replacing lime plastered wall coatings with gypsum products, invariably with reference to the breathing of said walls. So, what's the consensus, if indeed there is one, with regard to battening and overboarding the same said walls? Obviously there will be a gap of at least the batten thickness between the board and the plaster (or bare brick/stone), but should the space be vented (internally)? And should the walls be sealed for dust controlling purposes prior to overboarding?

 

[peaps]

There's no shortage of advice hereabouts regarding the folly of replacing lime plastered wall coatings with gypsum products, invariably with reference to the breathing of said walls. So, what's the consensus, if indeed there is one, with regard to battening and overboarding the same said walls? Obviously there will be a gap of at least the batten thickness between the board and the plaster (or bare brick/stone), but should the space be vented (internally)? And should the walls be sealed for dust controlling purposes prior to overboarding?

Overboard is an option but to seal the lime wall is a no-no and if you can add a vent to promote air flow then it would be a good thing.