Mould after new damp proof course

Condensation is a common cause of mould so it could potentially be something else in your house I.E from windows, doors etc. You should keep the air moisture to a minimum, dry any condensation that could be gathering on walls, window ledges, callings etc or install a dehumidifier to remove the moisture from the air. If this doesn’t work then the problem is most likely to do with your DPC course and would need to be re done professionally.

Condensation is common in many different properties. People regularly confuse condensation and damp. It’s possible that your issue was indeed condensation and not damp at all. You rely on the so called expert to advise. Generally they’ll go for the better profit job. Then come back for another dip in your wallet to deal with what was the original issue. Condensation can be treated by increasing the ventilation of your property. Stop drying clothes laundry inside. Fitting PIV vents or PIV units to loft will quickly eradicate moisture. Dehumidifier waste of time. Only good for removing moisture in x1 room where situated although as quickly as you take out the moisture it’s replaced by other moist air. I suggest a reputable qualified damp surveyor take a look and diagnose.

Hi if you have a accessible loft space. Fit a positive input ventilation system. Problem solved overnight you will obviously just have to do a mould kill and clean on existing mould. Leave internal doors open.. to allow air movement. Black Mould only grows when moist air comes in contact with a cold surface.

If they only put a damp course in and didn't remove the plaster that's a no no . Was the mould there prior to works. Its possible it wasn't rising damp but a condensation problem causing damp walls. Just sounds lovely like it hasn't either bin done properly or wrong treatment.

Your low level condensation issue has come straight back and was the likely cause of similar low level damp issues before. Unfortunately, all damp proofing contractors like to lie and advise (never prove) to you that you have a 'rising damp' problem rather than really having a humidity/temperature/ventilation issue. Condensation on the surface does not mean rising damp, but to all these chemical sales people it sure does. Awful, fraudulent industry. But whenever there is a lot of money to be made...