On 21/01/2020 22:17, Brian Reay wrote:

Sounds like it hasnt been €˜tanked - sealed to stop ground water
penetrating. Sometimes this is done on the soil side, sometimes it is on
the inside.

And/or no damp proof course

And/or damp proof course bridged.

And/or car parking roof hasn't got a slope and/or is leaking especially
if the roof is flexing due to varying loads (with and without the car).

If the electrician fitting the fan has noticed wet bricks/blocks high up
the wall then the water is probably getting in from the top.


The property should be covered by a 10 year NHBC warranty. Contact them if
the developer wont help.

+1
Share the cost with the neighbour and get a real surveyor to inspect and
give a report giving indicative cost to repair. Don't rely on a report
by the developer or a third party.
Based on this report get the developer a chance to correct the faults
and invoke the NHBC warranty.

I would be very wary about parking a car on structure that is so wet
where some, or all, of the support is wood.


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