Our downstairs shower room had been leaking for some time (could have been months) - only discovered when the walls in the utility area became damp -the leak has been sorted - but the concrete floor in the utility area is very damp, especially in the middle - although this dries up when we have the doors open, fans on etc - also we use the dehumifider at night time, as soon as we turn off the fans etc it becomes damp again. It is now 2 weeks.
Can someone advice how long will it to take to dry completely.
To make matters worse we did have heuga german tiles in the utility area, kitchen -which actually spread the condensation to the rest of the area (kitchen)

It depends how thick the concrete is and how much water has been absorbed by it.

There is definately a DPM under the concrete isn't there?

A friend has a problem with some similarities to the above.
An otherwize dry room, in a rebuilt stone built house ~ 40 years ago. Concrete floor, with good DPC by original owner [an Architect]. Some minor cracks in the flooring at the centre of an area of high, and low, damp patches as detected with a Moisture meter.
No obvious sources of water inlet, have applied heating and de-humidifier for ~ 4 weeks. Minor improvements, but relapse when heat and de-h' removed

Solutions:
dig up the concrete and under substances ~ 16 sq m, and replace;

"bitumen" / "self leveling", over existing concrete floor.

Comments, suggestions, etc, please.

'Handy

Asphalt works well, I had this done in the house I am living in now.

At the time there were no skirting boards on, or any of the walls decorated.

I believe the fumes from the asphalt can sometimes stain the walls/ceilings in places.

_________________
DIY | Donnas dream house

^ ^ ^
Very many thanks, UHM
Given a quote of ~ £1 500 for dig out, and ~£400 for Asphalt, and "Times is 'ard, work is short, I'd go for the Dig-out Sir / Madam. The Asphalt don't work." from the builder - things are MUCH clearer.
Will bear the good news to my friends, who, if you're ever in W Yorks, will, no doubt, buy you a schooner [of Taylor's] or two.
'Handy