When to plasterboard a cold damp wall

[Workingonit]

Hi everyone,

This is the first time I have posted on a forum so please excuse me if I make any mistakes. We have a 1934 semi which has a very cold wall in the lounge downstairs. It has come to light over this last winter when the wallpaper started to come off the wall. The outside has been rendered with Protectacoat and although we found some cracks, which we have since covered in Sandtex High Build we think the problem may be inside. We have removed all of the plaster from that wall and the bricks are wet. We have put a dehumidifier in the room and it seems to be drying it out but my questions start here.
Will the bricks ever dry out?
We want to baton the wall and use moisture resistant plaster board do we need to wait for the walls to be completely dry?
Do we need to insert any sort of thermal material between the wall and the new plasterboard?
Do we need to have ventilation in the space between the brick and the plasterboard?

We have added an extra couple of airbricks to increase the ventilation under the floorboards.

Thanks in advance,

[ultimatehandyman]

Hi and welcome to UHM



Lest see if we can help with your questions-

Will the bricks ever dry out?

It depends if the problem that is making them wet in the first place is fixed or not!

Is it a single brick wall or a cavity wall?

Do you know if the moisture is rising damp or penetrating damp




We want to baton the wall and use moisture resistant plaster board do we need to wait for the walls to be completely dry?

It is best to wait until it is completely dry if possible.


Do we need to insert any sort of thermal material between the wall and the new plasterboard?


You could use thermal plasterboard if the wall is cold.



Do we need to have ventilation in the space between the brick and the plasterboard?


Not normally, there is normally just an air gap.

[Workingonit]

Hi,

Thank you for such a quick reply!!

There is no rising damp, it is a double brick wall with approx 2cm cavity. We think it is probably condensation that has never been remedied so we are doing our utmost to sort it now.

Thank you for all the info, very useful.