Conductive underlays

Controlit GS is electrically conductive underlay, which is meant to be installed in the whole area right under bituminous waterproofing membrane. It is long lasting, strong and non-flammable material, which provides the possibility to carry out waterproofing inspections by electronic leak detection methods.

Controlit GS Single ply is electrically conductive underlay, which is meant to be installed in the whole area right under mechanically fixed and not fixed thermoplastic single ply waterproofing membrane (PVC&TPO).

The only difference between two types is intended technology of waterproofing membrane installation and additional plasma treatment (GS). That is the reason why this EPD is representative for both Controlit GS and Controlit GS Single ply.

The Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes (ELD) with Controlit electrically conductive underlays are innovative and reliable proactive technologies that offer safer and more efficient alternatives to traditional flood testing. The American Society for Testing and Materials (ASTM) has provided standard procedures for using ELD methods to locate leaks in exposed or covered waterproof membranes. These procedures are outlined in ASTM D7877-14, guidelines for utilizing ELD methods (such as High Voltage and Electric Field Vector Mapping (EFVM) / Low voltage test methods). While these methods are accurate and effective, they do have certain limitations.

For accurate Electronic Leak Detection, the deck material directly below the membrane must be conductive enough. In some cases, a concrete or steel substrate can facilitate this method. However, if the membrane is installed over electrically insulating materials like wood, insulating foam, stone wool insulation, or a protection board, it interrupts the electric path to any conductive deck. In such cases, a conductive material must be placed directly under the membrane to provide the necessary return path for the test currents.

A conductive substrate, such as Controlit underlays, is essential for the ELD technology to function effectively. Controlit solutions are suitable for a variety of roofing and waterproofing applications, such as exposed flat roofs, green roofs, blue roofs, loaded roofs and exploitable terraces, balconies, podium decks, swimming pools, and civil engineering solutions. Controlit solutions can be used as a proactive quality control and leak detection tool in the construction process, building maintenance, and warranty programs. Conductive underlays meet industry standards and specifications regarding conductivity, durability, fire resistance, thickness, flexibility, and other relevant parameters.