Basement & underground parking waterproofing in Bali

Our scope is the structure itself, and the systems match that. Crystalline slurries and admixtures seal the concrete matrix from within, so the wall stays waterproof even if a coating is later damaged. Swellable and PVC waterstops are cast into every construction joint, because joints leak long before concrete does. Membranes go to the external face while the excavation still allows access. And for structures already built and already wet, resin injection follows the water back to its entry point.

Every job ends with a test rather than an opinion. Lift pits, tanks and plant rooms are flood-tested over 24–48 hours with the level marked, dated and photographed. Basement slabs and walls get a documented dry-out period and a moisture survey before any finish goes near them. You receive product data sheets, batch records, photographs of every joint before it was buried, and a written warranty on the applied system.

Why underground water behaves differently here

Bali's water table moves. Through the wet season it can climb several metres in a fortnight, so a basement that stayed bone dry from June to October starts weeping in January. Add soils that hold water — the paddy clays behind Canggu, the weathered volcanic silts of the central belt — and a wall coated only on the inside is holding back hydrostatic pressure with a paint film.

The second factor is the concrete itself. Pours happen in 30 °C heat at high humidity, often at pace, and the result is plastic shrinkage cracking and the occasional honeycombed patch behind formwork. Neither is a scandal; both are water paths. That is why we treat the concrete as part of the waterproofing rather than as the substrate underneath it — crystalline chemistry inside the matrix, waterstops at every joint, and a survey that finds the honeycombing before backfill hides it for the life of the building.

Fixing a structure that is already leaking

Most of our injection work happens in buildings other people built, usually after two or three attempts with surface products have failed. The sequence is unglamorous. We chase the water back to its real entry point — rarely where the damp patch appears — then drill a staggered pattern of ports either side of the crack, flush the void, and inject polyurethane resin that foams on contact with water and stops the flow against pressure. Once the structure is dry, epoxy can follow to restore the structural knit.

All of it is done from inside, which matters when the alternative is excavating against a retaining wall your building sits on. A typical lift pit takes two days; a 30-metre run of cracked basement wall around a week. We then monitor for a fortnight through the next real rain, because the honest test of an injection is never the day it was done.