Residential service
Balcony Waterproofing in Singapore
Hydroseal waterproofs open balconies, terraces and planter boxes in condominiums and landed homes across Singapore. We correct ponding and falls, lay a proper membrane under the tiles and seal the edges so rain does not seep into the rooms below, backed by a Certificate of Warranty of up to 10 years.
- Est. 1995
- 1,000+ projects
- IRATA-certified
- BCA-registered
- bizSafe
- Up to 10-yr warranty
Balcony problems we fix
Ponding water that will not drain
Flat or wrongly graded balconies trap rainwater, which then works its way through the smallest gaps. We restore the fall so water runs to the outlet.
Seepage into rooms below or beside
Damp patches and peeling paint on the adjoining wall or downstairs ceiling point to a failed balcony membrane. We seal it at the source.
Tile debonding and lifting
Water trapped under tiles loosens them and cracks the grout. We address the waterproofing beneath, not just the loose tiles on top.
Planter box leaks
Soil keeps moisture against the structure constantly. We tank planter boxes so the water stays in the box and out of your walls.
Balcony waterproofing methods
Chosen to suit whether your balcony is tiled, exposed or a planter box.
Membrane under tiles
For a full re-do, we lift the finish, lay a fresh waterproofing membrane, then reinstate screed and tiles to the correct fall.
Ponding and fall correction
We re-screed to restore the gradient so rainwater drains to the outlet instead of pooling on the surface.
Crack and joint sealing
PU injection and joint treatment to stop active seepage through cracks, edges and the wall-to-floor junction.
Planter box tanking
Internal tanking of planter boxes so moisture from the soil is held inside the box and kept off your structure.
Where we work
Balcony and outdoor waterproofing for private homes across Singapore.
- Private condominium balconies and terraces
- Landed home balconies and roof terraces
- Open and uncovered decks
- Planter boxes and garden edges
- Terrace and link houses
- Semi-detached and bungalow homes
- Upper-floor balconies above living areas
- Walk-out balconies off bedrooms
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.
Common questions
Straight answers to what homeowners and building managers ask us most.
Light rain may drain away before it can get through, but heavy monsoon downpours overwhelm a balcony with poor falls or a failed membrane, so water ponds and forces its way in. That is why the leak seems to come and go. We test and inspect during dry conditions and identify the entry points before they cause more damage.
Free quote
Get a free quote for balcony waterproofing
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.
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