There are many waterproofing treatment options available for treating of this area some of them are conventional methods and some are advance in techniques. Before installing, we ensure that the area where waterproofing system needs to be install shall made free from all other activities that could disrupt the installation of the system. We also inspect and ensure that the substrates are free of cracks, protrusions and damage to surface integrity. We carry out all the necessary rectification and preparatory works before the installation of the specified waterproofing system. The methodology, which we commonly followed for doing waterproofing job are as under:
Cleaning and removing of dust, dirt and weak layers with wire brush/blower/ high pressure water jet wash and made free from any other contaminants (if any).
Surface shall be prepared by providing of 10-12mm thick plaster admixed with waterproofing admixture for making smooth finish to receive the waterproofing properly after casting of PCC (if required).
Choice of waterproofing systems is depends on various aspects such as requirement of site, locations, applicability of products, flexible to movement, durability and combination of layers etc. Before application, the surface should be SSD.
For better strength and reinforcement to waterproofing layers it is recommend that a suitable woven fiber mesh of 45-60 GSM shall be placed between the layers.
Protection plaster admixed with waterproofing admixture is required to cover the well-installed waterproofing systems before fixing of the reinforcements.
Grouting operation shall be done after fixing of 12mm dia GI/NMBS half the depth of the concrete section at a distance @ .75 to 1.0 Mtr C/c along the construction joints and other areas approx. 1.0 to 1.5 Mtr C/c with non-shrink expanding grouting compound.