On Friday, 15 November 2019 15:55:01 UTC, Andrew wrote:
On 15/11/2019 14:50, The Natural Philosopher wrote:
On 15/11/2019 08:11, Tricky Dicky wrote:
On the internal walls dry-lining as you suggest is not a problem but
on the single brick exterior walls you would have to be sure there
was no damp penetration from the outside.

Wrong. The plasterboard contains a vapour barrier. It is designed for this.



Only some variants do, intended for upstairs ceilings.

Most PB is not water vapour impermeable.

As long as there is a DPC in the wall, I would seal the
outside with breathable water repellent sealant intended
for this purpose.

Classic mistake. Net flow of water vapour is from interior to exterior, if you block its exit the wall is likely to get damp, very gradually.


NT