I am having a nightmare trying to work out where all the condensation is coming from in my flat and it's been suggested that I may have dampness in my external stone wall that I can't see but is coming into the house and causing all of the condensation and streaming windows.
I wanted to get double glazing as my house always seems cold with single sash and case, but was advised by the guy who came out that double glazing wouldn't solve the problem and that I may have dampness. he didn't want to charge for double glazing when the original windows were fine and he suggested I have dampness, and once that goes the house may be warmer.
It's an old house that's been turned into 3 flats and I'm on the ground floor. the external walls are large stone but the inside are plasterboard attached at various points so sounds hollow to tap. This means I can't get to the walls to see if there's damp - to be honest I'd not really know what to look for anyway.
Areas that don't get much air movement get slight black spots in corners of the rooms, and plastic storage boxes that don't move for ages under the bed had like a musty film at bits. From what I've read this is caused by condensation? Plus every single window in my house streams with water from the minute I get up until I go to my bed. I can wipe the water and it's back pretty quickly.
Should I get someone out to look at damp proofing, should I get one of those meters and try to get through to the stone wall behind the plasterboard then get the hole repaired. I'm not sure what to think, the more I try to look it up the more confused i become.
I'd be really grateful if someone could help or point me in the right direction. I don't want to get charged a fortune for someone to come and do work that's unneccessary.