Victorian House - Damp or Condensation

[racirach]

I moved into a victorian semi detached house earlier this year and had a damp survey undertaken which has recommended further air bricks in the cellar. A couple of less reputable companies said a full new damp course.

The house has a knocked through lounge to diner. However having lived in the house a while now it seems that the corner of the room which are on external walls keep getting a lot of moisture internally like condensation, which if I don't wipe off turns black/to mould. Is it likely to be rising damp or condensation?

Also a 1st floor bedroom seems to get the same in one corner (I have had the guttering replace to ensure water isn't seeping in from leaking guttering) Furthermore in the same room there are two areas on the external wall where the paint keeps bubbling, a bit like with rising damp except there is no salt to sand off. A builder said it was possibly likely to be due to the plaster being painted before it was fully dry in the past. Is this true????

Any advise appreciated

Rachel

 

[big-all]

dry washing indoors??
was the damp there in the summer

 

[racirach]

yes I do, do you think that is the likely cause?
I've dried clothes indoors in previous houses and never had this problem.

What about the corner of the bedroom wall though, that is no where near where I dry the clothes

 

[big-all]

hot air rises
warm air holds lots off moisture
cooling air drops moisture on the coldest surface
look in the wiki for the condensation link its all there

//www.diynot.com/wiki/building:condensation_in_houses
good luck