During some refurbishment work we have removed all the floor coverings from the kitchen, dining room and hall, in preparation for latex self levelling (All solid floor). The hall was covered with carpet under which were small wooden blocks (parquet flooring). These were stuck down with black bitumen like adhesive.
Over the weeks of refurbishment the tackiness of this black glue has been annulled by the copious amounts of dust that have been produced. However this dust layer has show up a worrying patch of what appears to be damp.
The weird thing is that it's right in the middle of the floor. It has slowly grown to about 3 inches in diameter. No sign of damp anywhere else. There are no buried pipes in the floor.
Nice pictureof the damp patch here... :-)
What should I do? Ignore it - it's not been a problem in the last
18 years :-) Or perhaps dig up the offending area and fill with an SBR & concrete mixture? Or what... ?
Thanks, Roy