Balcony & Planter Box Waterproofing in Singapore
Balconies and planter boxes sit in constant contact with rain and damp soil, so their waterproofing works harder than anywhere else in the home. We use flexible, UV-stable membranes designed for Singapore’s climate.
Signs you need this
- Damp or staining on the living-room wall beside the balcony
- Water pooling and draining slowly after rain
- Efflorescence or salt stains along the planter base
- Tiles lifting at the balcony threshold
- Soil staying waterlogged in the planter
How we fix it properly
Outdoor waterproofing has to flex with heat and resist UV, so we specify membranes rated for exposed conditions rather than indoor products. For planters we add a protection and drainage layer plus a root barrier so soil moisture cannot sit against the structure.
We pay particular attention to the threshold between the balcony and the interior — a frequent weak point where water tracks back into the living room — and reinstate proper fall toward the drains.
Finishes can be re-tiled or left as a trafficable coating depending on your preference and budget.
Common causes we look for
- UV-degraded or cracked external membrane
- No root barrier or drainage layer in the planter
- Failed seal at the door threshold and floor traps
- Ponding from inadequate fall to the drain
Our balcony & planter process
- 1
Assessment
Check falls, drainage, thresholds and existing membrane.
- 2
Preparation
Remove failed finishes; correct ponding and falls.
- 3
Membrane & barrier
UV-stable membrane, plus root barrier and drainage for planters.
- 4
Flood test
Water test to confirm no seepage to adjoining rooms.
- 5
Finish
Re-tile or apply a durable trafficable coating.
Balcony & Planter FAQs
Still unsure? A free assessment answers everything specific to your property.
Get a free, honest assessment
Tell us what you’re seeing — we’ll take it from there.
My planter box keeps staining the wall inside — why?
Planters hold damp soil permanently against the structure. Without a proper membrane, root barrier and drainage layer, that moisture migrates inward. We rebuild the planter waterproofing as a full system, not just a coat of sealant.
Can you waterproof my balcony without removing the tiles?
If the tiles and falls are sound, a clear or coloured trafficable coating over the existing surface may work. If water is ponding or tiles are lifting, we recommend lifting them to correct the falls first.
Related services
All servicesRoof & Flat Roof Waterproofing
RC flat roofs, pitched roofs and gutters sealed against monsoon rain with membranes that handle full sun and standing water.
External Wall Waterproofing
Driving rain and wall cracks sealed from outside so interior walls stay dry, paint stops peeling and mould stays away.
Floor & Wall Tile Re-Grouting
Worn, cracked grout and silicone renewed with waterproof grout to restore the first line of defence in wet areas.
Need balcony & planter help today?
Book a free, no-obligation assessment or call our 24/7 line. Honest diagnosis, no unnecessary hacking.