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Boldtura Plumbing & Construction

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Roof leakage & waterproofing.

Most of the roof leaks we’re called for in Kuala Lumpur weren’t fixed properly the first time. Membrane was rolled over a damp patch, the wrong primer used, or the real entry point was three metres away from the stain. We start every job with diagnosis.

Boldtura technician applying liquid waterproofing membrane around a roof flashing.

What this covers

From a single roof stain to a full membrane.

We don’t sell one membrane brand for every job. After tracing the leak, we recommend the right system — polyurethane for flat exposed roofs that flex with thermal movement, acrylic for pitched and terrace floors with foot traffic, cementitious crystalline for bathroom slabs and planter boxes.

  • Terrace and flat roof leakage diagnosis
  • Balcony and planter box waterproofing
  • Bathroom slab and shower screed re-waterproofing
  • Parapet wall crack repair and re-flashing
  • Roof gutter, downspout and box gutter overhauls
  • Metal roof sealing and skylight re-bedding

How we trace a leak

A diagnostic morning, not a guess.

01

Inspect inside

We map the stain on the ceiling, look for halo patterns and check humidity levels around the leak.

02

Walk the roof

On the roof above the stain we check membrane integrity, parapet flashings, gutter slope and any old patches.

03

Confirm the path

A controlled hose test isolates where water actually enters. Only then do we recommend the membrane spec.

Membrane systems we use

Right product for the surface.

Polyurethane (PU)

Flexible, UV-stable, ideal for exposed flat roofs and balconies. Two-coat application on a primed surface.

Acrylic

Water-based, good for terraces with foot traffic. Cures fast between rain showers — useful during inter-monsoon weeks.

Cementitious crystalline

For bathroom slabs, planter boxes and tanks. Embeds into the concrete and self-heals hairline cracks.

Warranty. We back our waterproofing workmanship with a written five-year warranty (subject to a reasonable maintenance schedule). Materials carry the manufacturer’s warranty on top of that.

FAQ

What homeowners ask about roofs.

The leak only appears during heavy rain — can you find it?
Almost always. Wind-driven rain at certain angles reaches gaps a sprinkler test won’t. We can stage a directional hose test that mimics typical monsoon angles to confirm the path.
Can you waterproof over an existing membrane?
Sometimes — only if the existing system is compatible and properly bonded. Often the cheaper long-term answer is to strip back to the substrate and start fresh, because covering up a bad layer just postpones the next leak.
How long does a roof membrane job take?
A typical KL terrace house roof is around three working days: one for prep, one for application, one for inspection. Weather window matters — we don’t apply during rain.

Ceiling stain after every storm?

Send us a photo of the stain plus a photo of the roof above it. We’ll tell you what we’d look at first and whether it’s a roof or a balcony issue.

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