Damp inside the wall

[TooMuchRain]

We have a single skin wall and had it inspected a while ago for damp and no problems were found apart from caused by condensation. To deal with the condensation, we have improved the ventilation but when we drilled right through the wall we discovered that it is damp inside. There is no damp actually inside the house, probably because it has been tanked, and there is no damp visible on the outside which has render.

I realise we are going to have to get another inspection done, but in the meantime just wondering if anyone has any ideas / experience of this?

After you stop the condensation, it will dry out at about one inch per month, if it can breathe on both sides. If it is painted or tanked it will take much much longer as water vapour cannot escape.

Look at it during rain to see if water is spilling from a gutter or downpipe.

That is very helpful, thank you. So, if it's 'old' damp (it could also be because the previous owners had a problem with the roof about a year ago), would we be able to speed up the drying by removing the render for instance? Or would that just allow more damp to penetrate the wall? Sorry if this is a stupid question...

If it is a cement or lime render, it will eventually dry out. But if it is cracked or gappy, rain may penetrate and make it worse. It won't dry out much until next summer.