我和我的丈夫拥有一层2床上平在维多利亚时代的转换。我们最后两套租户已经发现他们的衣服和鞋子模具。我们得到2潮湿专家:一个建议把机械通风口,没有提到上升的潮湿。另一个发现上升的潮湿在卧室和厨房里的一小部分。所以建议去掉2内置衣橱和dpc课程。还提到一个玻璃没有帮助保持温暖的地方,是导致凝结。我们删除内置的衣柜,所以也不得不re-carpet和油漆。把新的双层玻璃窗户,所有这些在一个月内被通知租户的问题!以上工作是2021年11月至2021年12月完成的。我们3月支付一个独立验船师检查属性。 The first thing he said that we didn't need to replace the windows! Found that the vent in the bathroom was not extracting enough (no window) and thought that it was not extracting out but just into the internal wall. The solution was to get a new inline ceiling fan with a humidistat which would need to be ducted through the rear bedroom and out of the rear wall. Found that the kitchen was not ventilated enough and so the bedrooms. Also, said that the external rendered black plinth was serving no useful purpose and so to remove it. The rendered plinth was bridging the physical damp proof course and was causing moisture to bridge the existing dpc. So great, we have a true independent surveyor who is not try to sell any products. In April my tenants serve their notice to leave. We want to get the flat sorted for good and before the new tenants move in as we do not want to go through this nightmare again. We got the contractor to carry out all that was recommended in the surveyor's report. He looked at where the fan in the bathroom was extracting to and if it was indeed extracting into an internal wall. He was certain that the current fan was extracting out so he had to lift the carpet and floorboards in the bedroom to see if there was a connection to pull the air out... yes, the fan was ducted all across the bedroom and out through the brick vent of the external wall. We got a better vent. He removed the rendered plinth, installed a passive vent in each bedroom and a kair heat recovery ventilator K-HRV150 in the kitchen. All as recommended by the surveyor. Job finished and we have new tenants moving. I made them aware of what issues we had but we had done all the work and feel confident the problem is sorted. They move into the property in May and 3 weeks ago whilst I was at their flat to collect some mail I decided to check on the walls and they were covered in mould! The 2 walls where the mould is growing are cold and wet. These are external walls but there is no sign of water ingress. Before doing the dpc, should these walls be insulated, if so how? Thank you.