The Variability in Resistance Moisture Meter Readings obtained from Medieval Roofs
Author(s): Brian Ridout
Water is responsible for the deterioration of building timbers. Resistance moisture meters are commonly used as a survey tool to measure the moisture content. However, variations in the properties of new and ancient timbers affect the readings obtained from resistance moisture meters. This report presents the findings of research into factors affecting resistance moisture meter readings obtained from timbers in three medieval roofs in Lincoln Cathedral, Winchester Cathedral and St John’s Church in Bishopstone between 1994-1997. To avoid erroneous diagnoses, the report concludes that assessments using resistance moisture meters should include readings taken at depth as well as on the surface of timbers. Where repairs have been carried out, the moisture contents of the full range of timbers present should be compared. In addition, variations in humidity and moisture content throughout the year should be taken into account when interpreting moisture meter readings.
- Report Number:
- 207/2020
- Series:
- Research Report
- Pages:
- 103
- Keywords:
- Medieval Standing Building Standing Structure Building and Landscape Conservation Timber Moisture
