Report Damp & Mould In Flat, Only Been There 4 Weeks in All about renting Posted February 11, 2012 Hello My girlfriend and I moved into a private rented flat on 14 January 2012, being managed through local estate agent. When we viewed the property 3 weeks before, the carpets had just been cleaned and a cleaner gave the place a quick once over just before we moved in. There was however a heater plugged in and a dehumidifier running, when we got the keys. Within 2 weeks the external walls were damp at the top, and within 3 weeks mould had started to appear. We have been running the dehumidifier and the flat is suitably heated (sat here in just a tshirt) and airing the property whenever possible, but the problem is getting worse. I have no experience with damp, could we of caused it so quickly? Is it more likely to be that after the carpets were cleaned and the property was left cold for 3 weeks that the damp set in? I have phoned and advised the agent who suggested I clean it with a mould killer spray. This has been done, and photos were taken before and after. I suspect that the property has always had a damp problem due to the look of the walls and that the landlord/agent knew but did not let us know. Where do I stand? Is this something the landlord should be fixing? Sorry for the long post, but thanks for reading.