Any ideas what could be causing the speckled wet/damp? (see pictures)
A bit of back ground, I recently moved and discovered the ensuite shower had been leaking due to failed sealant. I believe this must have been going on for years judging by the chipboard under the lino. (ive had a dehumidifier on for the last month drying this out). However in the adjoining bedroom I have found these speckled patches under the carpet &underlay, the areas appear to be where the previous owner had furniture. There are no damp patches on the walls near by.
The property is under 10 years old, and i have the ground floor flat. I have now cleared a number of air vents outside that were covered by planting etc. Im not sure how well ventilated the flat was.