Where exactly is the cause of moisture?
It is not just damp walls. In "Properties" is rising soil moisture is the most common cause of moisture. Some symptoms I have enumerated above. But there are other causes of damp walls.
The moisture analysis and consultation is important for you to escape a bad investment, to save much money, so you can save your nerves and do not make too much work!
Only when we know exactly the cause, I can recommend the best solution for you and can do the right thing, however. When I go is, you know what going on: According to the motto.
Usually from "experts" 300, - €, often much more charged for this service. Here you get them to günsitgen flat rate of only 149, - € within a radius of 50km from Cologne - no hidden additional costs!
Take my recall: As your local field, I will call you back within the next few days - so you are no costs associated.