What do protimeter moisture measurement results mean?

Answer 1

When used on a

masonry substrate Electrical Moisture Meters:

• Do NOT record % moisture

• Do NOT record % saturation They record a

relative reading NOT directly proportional to quantity – they are purely QUALITATIVE

When using a

timber scale on masonry results should be expressed as ‘% WOOD MOISTURE EQUIVALENT’ (% wme)

QUALITATIVE COLOUR SCALES FOR USE ON MASONRY

Manufacturers say:

‘Green’ – no problem

‘Yellow’ – Further investigation and/or remedial works may be required

‘Red’ – remedial action required

Note: these interpretations are too low for

masonry substrates!

Probably a better level for beginning of ‘significance’ on masonry substrates would be 24 – 25% wme