What could be the source of moisture on external bricks?

[bluewave1]

Good evening all,

Was hoping to see if anyone has had similar experience with the question above.

Bit of background - we’ve recently noticed that the bricks on our driveway have started to become moist. It’s pretty much on both sides of our front foyer (our entry way is elevated with a few steps). It also appears to become larger and larger. Photo attached for reference.

Approximately six months ago, we did a DIY wood sleeper retaining wall (5mx400cm, on the other side) as our block is slightly sloping. We made sure that the weep holes remain exposed and sit above the soil line. 

We are concerned and hoping that it is not too serious as we’ve just moved in. In the meantime, we are trying to organise a building/leak inspector to see where the moisture is coming from. Also looking to get a proper landscaper redo our DIY and possibly put a drain when the retaining wall is rebuilt.

I suppose before we go through all the above options (anticipating huge costs involved), we wanted to see if this is something that we can fix.

Thank you all and hoping for some help/advice.

 

[Nailbag]

Hi @bluewave1 

You could hire an inspection camera to trace the piping to see where it leads so you at least know where the tank I situated. Or get a plumber in who offers that service.

Nailbag