The El-D.E.C. Scanner detects and evaluates the moisture conditions within roofing systems by non-destructively measuring the electrical impedance.
A low frequency electronic signal is generated, transmitted into the material under test via one of the two electrodes incorporated in the rubber electrode mat, and received by the second electrode. The strength of this signal can vary in proportion to the amount of moisture in the membrane, The El-D.E.C. Scanner determines the strength of the current and converts this to a comparative moisture content value. By moving the El-D.E.C. Scanner across a roof surface in a regular pattern, a continuous reading is obtained and areas that contain moisture can be readily identified.
Moisture detection testing can be done at the time of installation for warranty auditing and quality control, as part of an ongoing maintenance program, or prior to re-roofing or repair of damaged roofs.
The El-D.E.C. Scanner is a durable but lightweight instrument that is easily transported to the roof surface. Having determined a known acceptably dry area, one of three sensitivity ranges is selected, and the El-D.E.C. Scanner is ready to use. Without causing any damage to the roof surface, the El-D.E.C. Scanner is moved over the tested area giving continuous moisture condition readings, of which a moisture map of the surface can be drawn up and leaks detected and traced to the original source.
The El-D.E.C. Scanner has an integrated and adjustable calibration ability allowing for accurate comparative readings. There are 3 ranges, and they should be selected as best suits the surface under test, for example:
Range 1- Most suitable for single-ply and thin roof coverings such as PVC and other smooth surfaces where insulation is wet, and moisture is close to the surface.
Range 2- This range is most suitable for built-up and modified systems, mineral surfaced felts, along with other smooth or gravel surfaces where insulation is less wet, and moisture is below the surface.
Range 3- Most suitable for thicker roof coverings such as mastic asphalt.
Without causing any damage to the roof surface, the El-D.E.C. Scanner is moved over the tested area giving continuous moisture condition readings, of which a moisture map of the surface can be drawn up and leaks detected and traced to the original source.