Case 1

Maintenance and Diagnostics

Whether flat roof are constructed of concrete or timber, they need to be laid to adequate falls and incorporate a vapour barrier. The generally accepted minimum fall is 1 in 80, but the latest recommendation is 1 in 40 to make allowance for any inaccuracies on the site and possible deflection of the roof structure.

Ponding occur only when there is unevenness of the slab surfaces. Regular inspection should be carried out especially after a downpour. This allow for visual inspection of possible ponding area. When ponding happen, immediate repair is needed. Apply a layer of screed so as to level the surface and take note of the fall, directing the flow of the water to the drainage area.

Diagnostics of Defect

Thermography

Thermography can be used to identify the position of water leakages on roof. The method is based on the characteristics of heat flow phenomenon, in a conductive medium of specific geometry, which is intended to model predetermined boundary conditions. Thermo tracer is a advanced equipment used in thermography technology.

The Basic Moisture Encounter Meter

Using the non-destructive technique of measuring resistance, Moisture Encounter detects moisture beneath surfaces quickly and accurately. The soft conductive electrode pads on the base of the Moisture Encounter run smoothly over the test surface and immediately identify moisture without scratching or drilling. Operation is as simple as selecting the appropriate scale, holding Moisture Encounter to the surface, and reading the meter.

Three built-in easy-to-read scales make measurement of wood, timber, drywall, roofing, plaster, and brick simple and accurate. The Moisture Encounter even detects moisture through ceramic tiles, flooring tiles, ceiling tiles, paint, wallpaper, drywall, carpet, or roofing felt.