Waterproofing Solutions
Waterproofing helps protect buildings from water ingress, moisture damage and deterioration caused by ongoing exposure to water. When waterproofing systems fail, water can enter through concrete cracks, joints, membranes, balconies, basements, retaining walls and other building elements.
United Trade provides professional waterproofing solutions for residential, commercial, strata and industrial properties across Sydney, Canberra / ACT, the Central Coast, Newcastle, Wollongong and the Blue Mountains.
The appropriate solution depends on the source of the water, the building element involved, the existing waterproofing system and the condition of the substrate.
What are waterproofing solutions?
Waterproofing solutions are systems and repair methods designed to prevent or control water from entering a building or particular part of a structure.
Depending on the property and the source of water ingress, waterproofing work may include:
- Remedial waterproofing
- Concrete crack repair
- PU injection waterproofing
- Waterproofing membrane repairs
- Construction joint treatment
- Sealing around service penetrations
- Basement waterproofing
- Balcony and external-area waterproofing
- Damp-proofing treatments
- Concrete repairs associated with water ingress
- Removal and replacement of failed waterproofing systems
Not every waterproofing problem requires the same treatment. A localised leak may need a targeted repair, while widespread membrane failure may require more extensive remedial waterproofing.
Where are waterproofing solutions commonly required?
Waterproofing can be required in many areas of residential, commercial and industrial buildings, including:
Basements and underground structures
Below-ground structures can be exposed to groundwater and hydrostatic pressure. Cracks, construction joints, retaining walls and service penetrations can all provide pathways for water ingress.
Balconies and podiums
Balconies and podium areas are exposed to rain and surface water. Failed membranes, drainage problems, deteriorated joints and cracking can allow water to enter the underlying structure.
Concrete structures
Concrete isn’t completely impervious to water. Cracks, joints, voids and defects can allow moisture to travel through the structure.
Retaining walls
Below-ground retaining walls can be exposed to groundwater and soil moisture. Waterproofing and appropriate drainage are important considerations where water is entering through the structure.
Service penetrations
Pipes, conduits and other services create openings through walls, slabs and other building elements. Poorly sealed penetrations can become localised points of water ingress.
What causes waterproofing to fail?
Waterproofing systems can deteriorate for several reasons. Common issues include:
- Age and general deterioration
- Cracking or movement of the substrate
- Damaged membranes
- Poorly sealed joints
- Failed sealants
- Inadequate drainage
- Water pooling
- Structural movement
- Damage caused by building or maintenance work
- Deterioration around service penetrations
- Hydrostatic pressure
- Failed previous repairs
A waterproofing failure can sometimes be localised, but widespread deterioration may require a more comprehensive remedial approach.
Signs you may need waterproofing
Some waterproofing problems are visible before significant damage occurs.
Look for:
- Damp or wet patches
- Water stains
- Efflorescence
- Peeling paint or coatings
- Mould or persistent musty smells
- Cracking
- Water pooling
- Active leaks
- Deteriorating joints
- Concrete spalling
- Rust staining
- Recurring water ingress after previous repairs
If the same area continues to become damp after surface repairs, the underlying waterproofing system may need to be assessed.
How do waterproofing solutions work?
The waterproofing approach should be based on the source and pathway of the water rather than simply treating the visible symptom.
1. Inspect the affected area
The affected walls, floors, joints, concrete, membranes and other building elements are examined for visible signs of water ingress.
2. Identify the likely source
Water can travel through concrete and other building materials before appearing at a visible leak. Identifying the likely source helps determine the appropriate repair.
3. Assess existing waterproofing
Where an existing membrane or waterproofing system is present, its condition needs to be considered. Previous repairs and deteriorated areas may also affect the solution.
4. Determine the appropriate method
Depending on the problem, the solution may involve injection, membrane repair, joint treatment, concrete repair, sealing or broader remedial waterproofing.
5. Prepare the area
Failed materials, loose concrete, deteriorated coatings and unsuitable substrates may need to be removed before waterproofing work begins.
6. Complete the waterproofing work
The selected system or repair method is applied to the prepared area in accordance with the requirements of the structure.
7. Inspect the completed repair
The completed work is checked to identify any remaining issues and confirm that the affected area has been appropriately treated.
Waterproofing methods
PU injection waterproofing
Polyurethane injection can be suitable for certain leaking cracks, joints and concrete water pathways. It can help address active water ingress where water is travelling through or around a concrete structure.
The suitability of PU injection depends on the location, condition and behaviour of the affected defect.
Remedial waterproofing membranes
Where an existing waterproofing membrane has failed or deteriorated, remedial waterproofing may involve repairing or replacing the affected system.
The extent of the work depends on how widespread the failure is and the condition of the substrate.
Construction joint waterproofing
Construction and movement joints can provide pathways for water if the original treatment deteriorates. Joint repair may involve removing failed materials and installing an appropriate waterproofing or sealing system.
Concrete crack repair
Cracks can allow water to enter concrete structures. Depending on the crack, repairs may involve sealing, injection or other concrete repair techniques.
Damp-proofing
Where moisture is rising through masonry or other building materials, a suitable damp-proofing treatment may be considered following assessment of the moisture source and building condition.
Commercial waterproofing solutions in Sydney
Commercial buildings can contain multiple areas where waterproofing is important, including basements, plant rooms, podiums, balconies, concrete structures and service areas.
United Trade provides commercial waterproofing solutions in Sydney based on the specific building condition and source of water ingress. The scope can range from localised leak repairs to remedial waterproofing of affected building areas.
For occupied commercial properties, repair planning can also take account of access requirements and the use of the affected area.
Residential waterproofing solutions in Newcastle
Residential buildings can experience waterproofing problems in basements, balconies, external areas, retaining walls and other parts of the property.
United Trade provides residential waterproofing solutions in Newcastle for identified water ingress and waterproofing issues. The appropriate repair depends on whether the problem relates to cracking, membranes, joints, drainage, penetrations or another part of the building.
Strata buildings waterproofing solutions
Waterproofing problems in strata buildings can affect common-property areas such as underground car parks, balconies, podiums, basement walls and shared external areas.
United Trade provides strata buildings waterproofing solutions designed around the condition of the affected building element. Where water ingress is recurring, identifying the source and pathway is particularly important before selecting a repair method.
Industrial waterproofing solutions in Wollongong
Industrial properties can have large concrete structures, below-ground areas, retaining walls, service spaces and other areas exposed to moisture.
United Trade provides industrial waterproofing solutions in Wollongong for affected areas, with the repair approach based on the building condition, water source and operational requirements of the site.
Why is professional waterproofing important?
Water that enters a building repeatedly can contribute to deterioration over time. Depending on the location and severity of the problem, ongoing moisture can affect concrete, reinforcement, coatings, joints and internal finishes.
Potential consequences include:
- Concrete deterioration
- Reinforcement corrosion
- Damaged coatings and finishes
- Persistent damp conditions
- Mould growth
- Efflorescence
- Deteriorated joints
- Damage around service penetrations
- Recurring maintenance problems
Waterproofing is therefore not simply about making a surface look dry. The source and pathway of water ingress need to be considered as part of the repair.
Why waterproofing assessment matters
A visible damp patch doesn’t necessarily show where water entered the building. Water can travel through concrete, joints and other materials before appearing in another location.
A professional assessment can help establish:
- Where water is entering
- How it is travelling
- Whether the leak is active
- Whether cracks or joints are involved
- The condition of existing membranes
- Whether drainage is contributing to the problem
- Whether previous waterproofing work has failed
- Which repair method is appropriate
This can help avoid repeatedly treating the visible symptom while the underlying water pathway remains active.
How can waterproofing problems be prevented?
Regular inspection and maintenance can help identify problems before they become more extensive.
Recommended maintenance can include:
- Checking waterproofed areas regularly
- Monitoring cracks and joints
- Maintaining drainage systems
- Checking for water pooling
- Inspecting service penetrations
- Addressing damaged sealants
- Investigating recurring dampness
- Repairing concrete deterioration
- Monitoring areas where previous waterproofing has failed
- Keeping records of waterproofing and remedial work
- Waterproofing solutions across NSW and ACT
United Trade provides waterproofing services across Sydney, Canberra / ACT, the Central Coast, Newcastle, Wollongong and the Blue Mountains.
Solutions can be considered for residential properties, commercial buildings, strata buildings and industrial sites, with the specific approach determined by the condition and requirements of the affected area.
Frequently asked questions
There isn't one waterproofing system that suits every building or defect. The appropriate solution depends on the building element, source of water, substrate condition, movement and existing waterproofing.
Get the right waterproofing solution for your property
If your property has water ingress, dampness, failed membranes or recurring leaks, United Trade can assess the affected area and determine a suitable waterproofing approach.
Contact United Trade to discuss waterproofing solutions across Sydney, Canberra / ACT, the Central Coast, Newcastle, Wollongong and the Blue Mountains.
