I've had a rising damp problem in my 1900s end terrace since I've moved in. I had a company out 12 months ago to inject DPC cream but it's not resolved the issue. I'm pretty sure that the issue is salts on the plaster drawing in moisture rather than external water ingress as the more humid it is, the worse it is. Anyway I've got the company back out to take a look and they're currently reinjecting the external walls. I doubt this will resolve the issue as I don't think it's the root cause but as I think I making a section 75 credit card claim, I want to give them a chance of fixing the issue. The fact they're reinjecting the external walls free of charge is them acknowledging that the original work hasn't worked, so hopefully that works in my favour.