EIT Technique

The principle of Electronic Integrity Testing (EIT) is to introduce a controlled conductive layer within the waterproofing system, enabling the integrity of the membrane to be tested without causing any damage. During installation, a uniform layer of EIT Primer is applied to the substrate and allowed to fully cure. Once cured, the primer forms a continuous conductive base layer. The waterproofing membrane is then installed on top, ensuring a stable and reliable electrical path for testing, even if the substrate itself is non-conductive.

During testing, the Buckleys Dry Roof Pro2 applies a high-voltage DC pulse between the membrane surface and the conductive base layer (EIT Primer). If the membrane is intact, the high-resistance material prevents current from passing through, keeping the circuit open. If there are punctures or defects in the membrane, current will flow through the compromised area into the conductive base layer, completing the circuit. The instrument immediately detects this signal and provides audible alerts to guide the operator, allowing precise defect localization.

The key to this method is the uniform coverage and full curing of the EIT Primer, which ensures a continuous conductive layer beneath the membrane and eliminates testing errors caused by variations in substrate material. Inspectors can quickly and accurately identify membrane defects, providing reliable assurance for the waterproofing system’s quality and facilitating targeted repairs.