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 loosely adhering particles with wire brush/blower/ high pressure water jet wash and made free from any other contaminants (if any).
Preparation of construction joints by opening in “V” shaped groove in 10 x 10 mm dimensions and groove shall further filled with ready to use repair mortar or polymer modified mortar.
Surface shall be prepared with ready to use repair mortar or polymer modified mortar to receive the waterproofing properly. The pipe joints shall be seal especially with epoxy mortar.
Grouting operation shall be done at construction joints at a distance @ .75 to 1.0 Mtr C/c with NSGC.
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.
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 except vertical surface.
Coving of 50 x 50 mm at all the junctions between slab and wall in CC 1:2:4 with 12mm nominal size stone ballast, under the drip coarse finish with CM in 1:3 admixed with waterproofing admixture.
Installed waterproofing shall be further protect with minimum 50mm thick M-15 grade cement concrete after providing of geotextile fabric or other suitable means.
Providing drainage systems of required height and compressive strength are depend on the uses of that particular area.