I have recently moved into a 100 year old bungalow. Started renovating kitchen and have found mould behind kitchen cupboards, but only on one wall (external wall, North West facing).
Have had 2 people round to look and had 2 different solutions suggested. The first chap said he suspects damp cavity wall insulation and his remedy would be cut into the wall, remove insulation and seal back up. (There's no obvious ingress point for water so I think he is guessing)
Second chap thinks it's condensation, and suggested a positive input ventilation system.
The kitchen is poorly ventilated (windows steam up very quickly when cooking) so condensation seems likely. We are intending to put better extraction in anyway.
From the way the mould has grown, is there any definitive way to tell which cause is most likely?
Have had 2 people round to look and had 2 different solutions suggested. The first chap said he suspects damp cavity wall insulation and his remedy would be cut into the wall, remove insulation and seal back up. (There's no obvious ingress point for water so I think he is guessing)
Second chap thinks it's condensation, and suggested a positive input ventilation system.
The kitchen is poorly ventilated (windows steam up very quickly when cooking) so condensation seems likely. We are intending to put better extraction in anyway.
From the way the mould has grown, is there any definitive way to tell which cause is most likely?