Last winter, I had serious dry and wet rot issues in the basement. The reason seemed to be that the wall was not watertight. This has been corrected and repair works were carried out by professionals (changing the ceiling of the basement/floor of the ground level and finishings).
A few months later, it seems dry rot is coming back:
I'd like to prevent it from spreading, and I see three possibilities, but need help to make up my mind:
- Installing a fan to take air from the basement outside; can take moisture out, but I'm afraid it only removes the air which is the center of the room, not the air close to the dry-rot.
- Installing a heater in the basement, but I'm afraid the heat helps the rot spreading out.
- Installing a dehumidifier with a pump, but it's hard to reach a outlet pipe because there is no basement under the kitchen.
I have read quite a lot about this but professionals do not seem to agree on the solutions. What solution would you recommend? At this point, getting rid of the mold matters more than the cost.
This is the average temperature/rain in the location of the property, which is in the UK a few miles away from the sea: