Cracked outdoor grout
Failed grout lines are raked out with dust-extracted grinders and refilled with high-performance grout built for outdoor movement and constant wetting.
Balcony Waterproofing Melbourne — Grout & Sealant Restoration
Melbourne balconies take a beating — thermal movement cracks grout, UV perishes silicone and heavy rain pushes water straight into the slab and the room below. We restore outdoor tiled balconies with flexible, weather-rated grout and sealants, no tile removal and no rebuild.
Signs your balcony is letting water through
Catching these early usually means a reseal instead of a full balcony rebuild.
- Water stains, damp patches or bubbling paint on the ceiling or wall under the balcony
- Cracked, hollow or missing grout between outdoor tiles
- Perished, split or lifting silicone along the perimeter and door threshold
- Pooling water that sits on the tiles long after rain
- White chalky efflorescence seeping out of grout lines
- Rust staining or blistering around balustrade posts and drainage outlets
Our balcony waterproofing process
01
Free assessment & fixed quote
Send photos or book an on-site look. We check falls, drainage, grout, silicone and the door threshold to find exactly where water is getting in, then quote a fixed price.
02
Rake out failed grout & silicone
Cracked grout is ground out with dust-extracted tools and every bead of perished silicone is stripped from perimeters, expansion joints and balustrade penetrations.
03
Regrout with flexible, weather-rated materials
We install high-performance grout that tolerates the thermal movement Melbourne balconies go through, and reseal movement joints with UV-stable exterior silicone.
04
Seal the surface & test the drainage
A penetrating exterior sealer locks out water, then we flood-check the falls and outlets so runoff leaves the balcony instead of soaking into the slab.
What we restore on a balcony
Perimeter & movement joints
Wall junctions, door thresholds, balustrade posts and expansion joints are stripped and resealed with UV-stable exterior silicone that flexes instead of splitting.
Surface sealing & drainage
A penetrating sealer locks out water absorption, and we check falls and outlets so rain runs off rather than pooling on the tiles.
Balcony waterproofing FAQs
Can you waterproof a balcony without removing the tiles?
In most cases, yes. Melbourne balcony leaks usually start at cracked grout, perished silicone and unsealed penetrations rather than a failed slab membrane. We restore those in place — no tile removal, no rebuild.
How much does balcony waterproofing cost in Melbourne?
Our balcony waterproofing and grout restoration starts from $1,200 and depends on the size of the balcony, the condition of the grout and how many joints and penetrations need resealing. Quotes are free and fixed before we start.
How long does a balcony take?
Most balconies are completed in one to two days. We ask that the surface stays dry and unused for around 24 hours while the grout, silicone and sealer cure.
Why do Melbourne balconies leak so often?
Four seasons in one day means constant thermal expansion and contraction, followed by heavy rain. That movement cracks rigid grout and splits old silicone, and water then tracks into the slab and shows up in the room below.
Which areas do you service?
We service Melbourne and surrounding Victoria, including the inner suburbs, eastern and south-eastern suburbs, northern suburbs, bayside and the west.
Stop your balcony leaking before the next downpour
Send a few photos and we'll come back with a fixed price — free, no obligation.