What is acceptable moisture level in walls?
A range of 5 to 12 percent is considered optimal.
A reading of up to 17 percent is generally considered moderate moisture and acceptable.
Any reading over 17 percent is considered to be an indication of saturation and the need to replace the drywall and to take preventative measures against future moisture buildup..
How accurate is a moisture meter?
A high-quality moisture meter used on the right material can be accurate to within less than 0.1% of the material’s moisture content by weight. However, a low-end moisture meter can be wildly inaccurate.
What humidity is considered damp?
Once humidity levels in the home are brought down to below 60%, airborne bacteria and viruses will not only stop breeding, but will struggle to survive. To control heavier cases of condensation on windows, damp or mould, it is advisable to bring the humidity down to 40% during the winter months.
What is a normal damp reading for plaster?
Dampness readings in wood usually covers a scale from 0 – 40% maximum (average softwoods are saturated at 28% – 32%) and damp readings in masonry (brick, stone, plaster, concrete) usually range from 0 – 5% maximum.
What is a high moisture reading in plaster?
In severe conditions you may see higher readings of skirting 22%, plaster 1% – 3% and brick around 2% – 5%. Readings are taken on a reference scale as it is only a relative degree of dampness. Wood moisture scale (wood moisture equivalent ‘WME’) is the most common and is recognised by professional bodies.
Do moisture meters work on plaster?
You cannot use any type of electronic moisture meter to get a quantitative measure of the amount of moisture in masonry or plaster.