Well the latest reading is 96% !!!
I am off the job now and have spoken to the client who is very understanding now. I assume he has been checking up on the info I have been giving him.
At this point I have put it in writing that I feel a carbide bomb test should be done and the best way forward will be to contact the screeder to get this sorted.
The client agrees and as I type this he is chasing them for an answer.
Just to put my mind at rest about the hygrometer I will be testing it on a section of floor in my house.....just out of curiosity .
For further jobs I will have a letter printed off, and it will say that it willl be the responsibility of the screeder or client to obtain a satisfactory test before I start tiling.
just a couple of questions before you go... I assume the screed was it heated during the testing I.e. the ufh was not on. And also, not to do with you i know, but is there an effective damp proof membrane under the screed. It should be built as substrate then 1200gauge membrane, insulation, 500gauge slip membrane, then pipes then screed.
To go the whole hog with letters it would hphe useful to get a written instruction to start which says that they have tested and it is dry... Perhaps you should get them to sign a pre printed sheet before you start.
