Balcony Repairs Sydney
Leaking balconies are one of the most common defects in Sydney's strata and commercial buildings. Metro Remedial delivers rectification ranging from targeted repairs to full membrane replacement across an entire building.
- In Business
Since 2011 - DBP Act
Registered - ACRA
Member - iCare
Approved
Our Clients
Our clients include both government and non-government agencies.
Balcony Repairs That Fix the System
When a balcony leaks, the damage you can see is almost always the last stage of the failure, not the first. Water has usually been tracking through a failed membrane, a poorly detailed junction or a drainage defect long before it appears on the ceiling below.
That’s why re-tiling or re-sealing a balcony so often fails within a season or two. The layer that actually failed is still failing underneath.
At Metro Remedial, we investigate which layer has failed and why before giving recommendations for next steps. Working from engineer, architect and Design Practitioner documentation, we deliver balcony repairs across residential, strata, commercial, government and education buildings throughout metropolitan Sydney.
Our Balcony Repair Services
We deliver targeted repairs through to full balcony rectification programmes, including:
- Balcony leak investigation and diagnosis
- Flood testing
- Balcony waterproofing replacement
- Membrane repairs and interim waterproofing solutions
- Screed removal and reinstatement to correct falls
- Drainage upgrades, outlet replacement and overflow provision
- Door threshold and sub-sill detailing
- Balustrade removal, reinstatement and fixing remediation
- Concrete repairs to balcony slabs, edges, nosings and soffits
- Concrete cancer and spalling rectification
- Structural crack repairs
- Tiling and surface reinstatement
- Protective coatings and sealant renewal
- Full balcony rectification as part of broader building remediation
Common Signs of Balcony Failure
We deliver targeted repairs through to full balcony rectification programmes, including:
- Water staining or drips on the soffit beneath the balcony
- Ceiling and cornice staining in the apartment below
- Damp walls or damaged flooring near the balcony door
- Efflorescence on the balcony underside, edges or soffit
- Lifting or cracked tiles
- Cracked grout and failed perimeter sealant joints
- Water ponding on the balcony after rain
- Rust staining around balustrade fixings and slab edges
- Spalling concrete on the balcony edge, nosing or soffit
- Corroded or loose balustrade posts and fixings
Our Balcony Repair Process
01 Understand the Defect
We review defect reports and engineering documentation, inspect the balcony and the areas where water is reaching, and perform flood testing where required to confirm the source before any scope is priced.
02 Plan the Works
Every building presents different challenges. We develop construction methodologies that consider access, resident safety, weather exposure, sequencing and building operations, including staging balcony by balcony where residents need to remain in place.
03 Repair the Substrate
Any concrete deterioration, cracking or corroded reinforcement is repaired in accordance with the engineer's design, and falls are corrected before waterproofing is reinstated.
04 Reinstate the Waterproofing System
The membrane is installed in accordance with the approved design. Drainage is upgraded where the original provision is inadequate.
05 Verify and Hand Over
Completed waterproofing is tested before tiling or surface reinstatement. Balconies are handed over with the relevant documentation, so owners have a record of what was done and confirmation that the repair has been completed correctly.
What Causes Balconies to Fail
Balcony defects are usually the result of several factors acting together rather than a single fault. The most common causes include:
- Membrane failure. Older systems perish, lose adhesion or crack under thermal and structural movement.
- Poor original detailing. Insufficient upturns at door thresholds, wall junctions and balustrade penetrations allow water to track behind or beneath the membrane.
- Inadequate falls. Where the balcony doesn’t drain to the outlet, water sits on the membrane and against the threshold.
- Blocked, undersized, poorly located, or badly terminated drainage outlets are frequent contributors to balcony leaks.
- Structural movement and cracking. Cracks that open through the substrate provide a direct path for water.
- Core-drilled and surface-fixed balustrade posts that penetrate the waterproofing. Where these details fail, water enters at the fixing and corrodes it from the inside.
- Concrete deterioration. Once water reaches the reinforcement in a balcony slab, corrosion begins, and the defect becomes structural.
Buildings We Repair
Metro Remedial carries out façade remediation on:
- Strata apartment buildings
- Commercial buildings
- Government facilities
- Schools and universities
- Industrial buildings
- Retail centres
- Aged care facilities
- Heritage buildings
- Mixed-use developments
- Residential homes
We regularly undertake works in occupied buildings while maintaining safe access and minimising disruption to residents, tenants and building operations.
Why Choose Metro Remedial for Balcony Repairs
Technical understanding, backed by an experienced team
Our team brings a wealth of experience across remedial building, waterproofing, repairs and construction, giving us a practical understanding of how these systems interact on a balcony. That means we can interpret remediation documentation and deliver the works correctly.
We work closely with engineers, architects and consultants
Delivering remedial repairs from engineer and Design Practitioner documentation, executed exactly as specified.
Specialists in occupied buildings
We deliver balcony works in occupied apartment buildings, commercial properties and education facilities every day, staging works so residents and tenants stay in place and stay informed.
From $10K repairs to $5M full rectification
We work from engineer and architect reports to deliver the right solution for your budget and your timeline, including interim options where full rectification isn't immediately feasible.
Credentialed, registered and insured
Registered under the Design and Building Practitioners Act, fully insured, an ACRA member and iCare approved.
Established in 2011
Since 2011, Metro Remedial has delivered remedial building projects across strata, commercial and government properties throughout Sydney.
Frequently Asked Questions
Why does my balcony keep leaking after it's been repaired?
Because the repair addressed the surface rather than the failure. New tiles, fresh grout or a re-applied sealant bead won't stop water that's entering through a failed membrane, an inadequate fall or a poorly detailed threshold. Until the failed layer is rebuilt, the leak returns.
Who is responsible for balcony repairs in a strata building?
In most NSW schemes, the balcony slab and the original waterproofing membrane form part of common property, making rectification the owners corporation's responsibility under its duty to maintain common property. Boundaries differ between schemes, so the position should always be confirmed against the registered strata plan and the scheme's by-laws.
Can residents stay in the building during balcony works?
In most cases, yes. Balcony works are typically staged so only a limited number of balconies are offline at any time. The balcony itself is out of use until handover, and where the door threshold is being rectified, access is temporarily restricted and made weatherproof.
Do you work from engineers' reports?
Yes. Many of our balcony projects are delivered from engineer, architect and Design Practitioner documentation under the NSW Design and Building Practitioners framework.
Do you offer interim balcony repairs?
Yes. Where full rectification isn't immediately feasible, we can provide interim works that reduce water ingress and limit further damage while owners secure funding for permanent repairs.
Related Services
Balcony defects rarely occur in isolation. Metro Remedial also provides:
Talk to Sydney's Balcony Repair Specialists
Whether you’re dealing with an active leak into the unit below, fielding resident complaints, or already holding an engineer’s report requiring implementation, Metro Remedial can help.
We’ll review your project, explain the available options and provide a practical solution tailored to your building.