Damp Proof Vents

[Manymoves]

Has any body got these vents fitted to a bungalow? The company's that offer this is Holland or Schiver. I have asked for a recomendation in Bristol so I could talk to an end user but they only offer properties on the outskirts.
Can some help me please

[The Builder]

How old is the bungalow? I doubt if you actually need them.

[Manymoves]

My bunglow was built in 1930's. I have lowered the outside ground, and installed a trough about 30cm away from the outside walls about 30cm deep and added a dpc membrane covered with shingles. This was done by the builder I employed

[The Builder]

I'd be very surprised if it's not a cavity wall construction. If so, then although everything you've done around the building is fine, but won't address what I assume to be a damp problem on the inside.

If damp is visible, then it's most likely condensation. Water vapour on a cold surface. Do you have cavity wall insulation?

[Manymoves]

The property is single brick. I have checked it out. If there was a cavity I would not have this problem. The Mould is just above the skirting board on the square bay. If it was condinsation I would see it on the window and have water on the window cill?