This quotation from Protimeter mentions the two most common causes of false high readings - “Contrary to popular belief, a moisture meter is not a diagnosis tool. Rather, it helps an inspector make an informed call about moisture’s presence within a space or material. If your meter is giving you a high reading, that merits further investigation -- dampness may not be the reason for the measurement; metals and salts cause false-positive readings.”
If the condensation hangs round long enough it can skew readings which is why you need to take a comparative reading. A lot of misdiagnosis of rising damp is caused by things like condensation. You often see videos of people lifting the plaster to find dry brickwork beneath.
This quotation from Protimeter mentions the two most common causes of false high readings - “Contrary to popular belief, a moisture meter is not a diagnosis tool. Rather, it helps an inspector make an informed call about moisture’s presence within a space or material. If your meter is giving you a high reading, that merits further investigation -- dampness may not be the reason for the measurement; metals and salts cause false-positive readings.”
#student Final question - foil backed plasterboard? 12:28
absolutely. the classic moisture meter false reading.
I have that book its very good
Great video,
Can condensation/cold spots cause higher readings to walls?
Thanks
If the condensation hangs round long enough it can skew readings which is why you need to take a comparative reading. A lot of misdiagnosis of rising damp is caused by things like condensation. You often see videos of people lifting the plaster to find dry brickwork beneath.
Foil wallpaper lining, Black Ash plaster, batteries failing in the meter, condensation on the wall all can give high reading 🎉
Was Typical Suspects the sequel to Usual Suspects film? 😮
Foilback plasterboard
Certain engineering brick from the 70s give false high readings. Brick is black in colour.