Basement Waterproofing in Damansara Heights

01 / Overview

Basement Waterproofing for Damansara Heights buildings.

Damansara Heights sits on a steep hillside, and almost every bungalow basement or condo car-park basement here takes lateral water pressure into the back wall. ODSCC is an authorised applicator for SIKA, FOSROC, MAPEI, BOSTIK, PENTENS and DENKA construction-chemical systems, and we have been repairing basements in this terrain since 1997. We diagnose the leak path, stop active ingress with PU injection, then seal the negative side with a cementitious or crystalline system.

02 / Why Damansara Heights

Local building stock & failure patterns.

Damansara Heights and the adjacent TTDI ridge are some of the oldest established affluent neighbourhoods in Kuala Lumpur, and the housing stock reflects three distinct eras: 1970s–1980s bungalows on large plots, 1990s townhouses with single basements, and 2010s+ luxury condos like Pavilion Damansara Heights with deep basement car parks cut into the slope. The geology — Kenny Hill formation shale with clay-rich overburden — does not drain easily, so groundwater perches against the back wall of any below-grade structure cut into the hill. When the original positive-side waterproofing fails (and on bungalows from the 1970s–80s, it always does eventually), the only practical fix is to work from the inside: trace the cold joints and tie-bolt holes, inject PU until the wall holds dry, then apply a cementitious slurry to seal the surface. We see this pattern repeatedly along Jalan Setiakasih, Jalan Damai and the older lanes off Bukit Damansara. Newer condo basements have generally been pre-applied with HDPE membrane during construction but still develop spot leaks at construction joints after the building settles.

03 / Typical scope

What we deliver on site.

For a hillside bungalow basement in Damansara Heights, the typical sequence is: full crack and cold-joint mapping, hydrostatic-pressure injection of polyurethane resin behind the wall, then a two-coat negative-side cementitious application (SIKA-1 Pre-Bagged System or FOSROC Proofex Engage) over the cleaned substrate. Where rebar is exposed, we run a corrosion-inhibitor primer first. For condo basement car parks we generally focus the work on the affected bays, staging so half the floor stays in service. Most jobs take 1–3 weeks depending on basement size, ingress rate, and how much spalling has already occurred at exposed rebar.

Full service overview: Basement Waterproofing.

04 / FAQ

Questions from Damansara Heights clients.

• My Damansara Heights basement is wet on the back wall facing the slope — can it be sealed from the inside?

  Yes. Excavating from the positive side of a hillside basement is rarely practical. We seal from the negative side using PU injection plus cementitious or crystalline systems — purpose-built for this scenario.

• How long has the original 1970s basement waterproofing typically lasted?

  Most bituminous positive-side systems from that era are now beyond their service life. We see active ingress in most untreated 40-plus-year-old basements in this area.

• Do you work with structural engineers if the rebar has corroded?

  Yes. For load-bearing repairs we work with the building consultant to verify the repair specification before patching exposed rebar with polymer-modified mortar.

05 / Why ODSCC

Klang Valley waterproofing since 1997.

• CIDB G5 since 1997 — eligible to quote on JMB and MC tenders directly.
• IRATEC-certified for industrial rope-access work at height.
• Authorised applicator for SIKA, FOSROC, MAPEI, BOSTIK, PENTENS and DENKA construction-chemical systems.
• Site visits across the Klang Valley for projects we can take on — no charge for the visit itself.