Core service
External Wall Seepage Repair in Singapore
Hydroseal stops water coming through external walls across Singapore, sealing cracks, replacing failed sealant joints and re-coating porous façades. We reach high-level walls by IRATA rope access, treat the cause of the seepage, and warranty the repair.
- Est. 1995
- 1,000+ projects
- IRATA-certified
- BCA-registered
- bizSafe
- Up to 10-yr warranty
Why external walls leak
Cracks in render & concrete
Hairline and structural cracks let rain track inside. We inject and seal them, then re-coat the surface.
Failed sealant & expansion joints
Perished or split sealant around panels, windows and movement joints is a leading cause of wall seepage, we re-caulk with the correct sealant.
Porous or aged paint & render
Worn coatings absorb water. A breathable waterproof coating restores the wall’s defence.
High-level walls you can’t reach
On condos and commercial towers, rope access lets us repair façade leaks without scaffolding.
How we repair wall seepage
PU crack injection
Polyurethane injected into cracks and voids to seal the water path within the wall.
Sealant replacement
Removing failed sealant and re-caulking joints, panel gaps and window perimeters with the right grade of sealant.
Protective wall coating
Breathable, water-resistant coatings that shed rain while letting trapped moisture escape.
Rope-access reach
IRATA-certified access to treat high-level and hard-to-reach façade areas safely and economically.
How we work
One clear process, start to warranty
The same disciplined method on every job, so you always know what happens next and why.
- 01
Diagnose
A free, no-obligation site inspection. We trace the water path to its true source, not just where the stain shows, using moisture mapping and, where needed, rope-access close-up survey.
- 02
Recommend
A clear written recommendation matched to your building, budget and timeline: the method, why it suits Singapore’s climate, what it costs, and how long it lasts.
- 03
Execute
Our trained crews carry out the works with minimal disruption, surface preparation, treatment and protective coating done to specification, with safety and tidiness on site.
- 04
Document
You receive a photographic record of the works and, for façade inspections, a full condition report, the documentation facility managers need for BCA and building records.
- 05
Warranty
Every completed project is backed by a Certificate of Warranty, from 1 to 10 years depending on the system, so the result is protected long after we leave.
Recent related projects
Common questions
Straight answers to what homeowners and building managers ask us most.
Wind-driven rain is forced into cracks and failed joints that stay dry in light showers. The water then tracks through the wall and appears inside as a damp patch, often some distance from the actual entry point. We locate the real entry points on the façade and seal them.
Free quote
Get a free quote for external wall seepage
Tell us about your property and the problem. We’ll diagnose the cause and quote, no obligation.
- Free, no-obligation site inspection
- Certificate of Warranty on completed work
- IRATA-certified, licensed & fully insured
- We respond within 1 business day.
Prefer to talk now?