Moisture Meters.

[enduro]

I looked at a job today, bathroom walls with new plaster, the builder told me it was plastered a month ago, and he wants it starting next week, but the plaster still felt damp to me....So im going to get a moisture meter to take a reading but im not sure what the reading should be for plaster, i read for painting it should be 7.5 per cent. Anybody know how dry it needs to be for tiling.

 

[brian c]

ENDURO,if you are buying a meter it should tell you in the pamphlet.You get different types of meters there are ones with the colours red,green and amber and obviously the green light is for go.

 

[Pawelzik]

Should have been mentioned on any powdered addy bag: < 2% for cement based plaster, < 0,5 % for gypsum based plaster.

As a rule of thumb: Take 1 page of a newspaper and put it on the floor resp. against the wall and cover it with a brick. If it feels wet after 1 day the ground contains still too much moisture.