Damage caused by sub floor ventilation and errors with dampcourse levels from builders.

This video displays what happens when you put sub floor ventilation under a house that hasn't been properly protected first. Before putting sub floor ventilation in, you should treat any exposed brickwork that has rising damp in it before they're installed.
If this property continues to have rising damp and they did not turn their fans off the damage to the house will cost tens of thousands of dollars to repair. They'll I need to rectify walls and Piers below their house.
With our rising damp injection system we would inject all walls and peers at ground level to prevent any moisture exiting the ground into the substrate of the building.
You can also see in this video that have installed the damp course to high in the brickwork. If the damp course was installed to the correct levels then installing subfloor fans and ventilation would not be an issue but because there's moisture in the bricks and salt is being drawn out of the ground into the bricks, installing sub floor fans with expediate the damage that is occurring in the house.
www.risingdamp.sydney

[@barrymichaels2663]

Pastic paint on buildings is a big no as it traps moisture.

[@foxfff37]

So what's the best way to fix this issue?

[@vbroder15]

He doesn’t know

[@meteora8888]

Wouldn't a hygrometer help adjust to get the right level?

[@michaelbalfour3170]

Wait, too much ventilation? I can see the logic, the logic being that the ventilation dries the bricks out, but then moisture from the ground osmotically rises up the bricks again only to be pulled out a again, essentially (and ironically) increasing the movement of water through the brick and with an increase, minerals from the brick/mortar. I feel really bad for the owners. They are kinda stuffed at this point. Hope insurace can cover it.

[@TheSuperdodgy]

Incorrect ventilation. Too high, which is why all the bottom bricks and footings were damaged. The damp was going up as far as the ventilation. It should be at ground level. The whole idea is to have the air flow go across the ground, not 1-1.5m from the floor.