Damp Proofing

Mould on Carpet following laying of screed floor

Anonymous user 03/03/2024 - 2.55 PM

In May/June we had repairs done to our property including brickwork repairs, laying of a screed floor on top of an existing concrete base and redecoration to our dining room. Since that time we have noticed areas of mould (white, furry patches or darker dust like patches) on the carpet in this room. Since the work was completed the room has been empty of furniture, the curtains have been put back up and the room hasn't been used. A fortnight ago I went in there to find these patches on the carpet. I immediately vacuumed them up, went on holiday for a fortnight, have come back and mould has regrown but not as extensively as it was a fortnight ago. There isn't any evidence of mould anywhere else in the house and is only on the carpet in the room, and we haven't had this issue prior to the work being done. Logic tells me that it is to do with the floor. The screed was laid 18 days prior to the carpet and underlay being relaid. I don't know much about the screed other than it contained fibres and was like a dry cement substance. Any advice? Since this posting, we have now lifted the carpet and underlay and there isn't any sign of mould either on the back of the carpet, underlay or on the surface of the screed! We have now a hygrometer and humidity in the room at the moment is around 67% and going up. As the only thing new is the floor, what should our next step be? There are obviously raised moisture levels in that room causing mould to grow on the surface of the carpet. As this work was done as part of an insurance claim, we are not sure what our next steps should be. The builder who the insurance company appointed arranged for the carpet to be lifted and is now happy that there is no obvious sign of moisture. However, from our part this problem has only arisen following the laying of the floor. Any further advice for me?