Waterproofing Across Bali: What Leaks Where

We trace and seal leaks across the southern and central belt of the island — from Canggu, Berawa and Seminyak through Kuta and Denpasar to Sanur, Jimbaran, Nusa Dua, Uluwatu and Ubud, with one guide rate for all zones. What changes from area to area is why buildings leak, and so which membrane and which detail we specify.

Canggu & Berawa: flat roofs and a high water table

The modern villa style of Canggu and Berawa means flat and low-pitch concrete roofs, where water does not run off — it ponds and works into every hairline crack and badly sealed drain, pipe or rooftop equipment mount. The second problem is groundwater: much of the area is former rice paddy, so ground-floor slabs, sunken bathrooms and plunge pools sit against wet ground all year. Typical work: flat roof re-waterproofing and damp slabs.

Seminyak: shared walls and ageing pools

Seminyak is older and densely built, with villas sharing party walls. Water that gets behind a membrane on one side can show up as damp on the other, so tracing the true water path matters more than coating the wet patch. Many private and rental pools here are well over a decade old, and shells lose their lining with age — see pool membrane and re-lining.

The Bukit — Uluwatu, Jimbaran & Nusa Dua: wind, salt and infinity pools

On the clifftops around Uluwatu rain is driven sideways by sea wind, so leaks often appear high on walls rather than at the ceiling. Across Jimbaran and Nusa Dua constant salt air degrades coatings and corrodes flashings faster than inland, and the signature infinity pool puts a weir edge and an exposed wall in the harshest conditions. The spec here is salt-resistant, UV-stable systems and meticulous detailing at parapets and overflow edges.

Kuta: low-lying ground and ageing roofs

Kuta and Legian sit low and flat near sea level. In downpours drainage cannot cope, streets flood and ground-floor rooms take water from below. Much of the building stock is older, with torch-on membranes and coatings long past their service life and layered patches that fail all at once. The lasting fix is stripping back to the slab and one fresh system, plus ground-floor damp treatment where water rises.

Denpasar & Sanur: flat commercial roofs and older villas

Denpasar has the multi-storey houses, shophouses and offices where one roof failure reaches several floors, and flat roofs cracked around water-tank stands and AC plant. In Sanur, long-established villas hide tired bathroom membranes and roof upstands laid decades ago — work often done during a renovation window. See bathroom waterproofing for wet rooms leaking into the room below.

Ubud: extreme rainfall and retaining walls

Ubud and the central highlands get far more rain than the coast, and surfaces there rarely dry out, which slows any repair that needs a dry substrate. Homes built into slopes rely on retaining walls holding back saturated soil; damp lower rooms, weeping walls and white efflorescence are the signature complaints, handled with basement and retaining wall waterproofing.

The same guide rates apply in every area — see the waterproofing price list — and the first step is always the same: photos on WhatsApp or a leak inspection, so the repair matches the real cause.

Choose your area