Waterproofing Repairs and Water Leaks in Strata Buildings

Waterproofing repairs help protect balconies, roofs and other exposed areas of a building from water ingress. For strata owners and managers, the work often involves more than replacing a membrane. Drainage, flashings and connections with existing construction can also influence the repair.

Remedial builders work with these adjoining elements as part of repairing existing buildings.

What waterproofing repairs can involve

Depending on the building and the identified defects, waterproofing work may include membrane replacement, surface preparation, repairs around penetrations and changes to drainage or flashing details. The materials and extent of work will depend on the area being repaired and the condition of the existing construction.

Balcony waterproofing and adjoining details

Balcony waterproofing needs to be considered alongside outlets, wall junctions and other adjoining details. These elements have different roles in managing water. Their connections help determine the repair details and the practical approach to the work. Each site and its methodology can be unique based on its conditions.

Water leaks can have several contributing factors

Visible dampness does not always indicate a failure of the waterproofing membrane. Moisture may relate to water ingress, condensation, ground moisture or a combination of factors. Depending on the location, relevant considerations may include the construction details, damp-proofing, ventilation, drainage and maintenance.

An experienced eye can help interpret the pattern of dampness and narrow the possible causes. Observations, previous repair history and access to the affected areas can help identify details that warrant closer attention and whether further testing would be useful.

For example, mould may form on a concrete ceiling beneath an exposed roof or balcony when the slab becomes cold enough for moisture in the indoor air to condense on its underside. This can occur where insulation is limited, particularly when indoor humidity is high and ventilation is poor. Repeated surface dampness can encourage mould growth, even without rainwater passing through the waterproofing membrane.

A failed or bridged damp-proof course involves a different moisture pathway. This barrier normally interrupts the upward movement of ground moisture through masonry. If it is damaged or bypassed, moisture can be drawn into the wall through small pores in the brickwork and mortar, causing rising damp.

Where new waterproofing meets existing construction

Remedial waterproofing usually involves working with parts of a building that remain in place. New materials may meet older membranes, concrete, thresholds or cladding. Repair methods and connection details can be tailored to the site conditions and the materials being retained.

Some conditions are concealed beneath tiles or behind wall finishes and may only become apparent when access is available or testing is undertaken.

Remedial repairs generally address a defined area or problem within an existing building. If issues persist, further investigation may identify another contributing source, a concealed condition or a need to adjust or expand the repair.

Choosing remedial builders for waterproofing work

Relevant project examples can help explain the types of work a builder undertakes. Remedial Builders provides strata waterproofing and leak repairs, including balcony and roof membrane work, alongside general building repairs. View our project portfolio for examples of completed work.

Discuss your waterproofing repairs

For balcony waterproofing, water leaks or related remedial building work, contact Remedial Builders on 1300 665 877. Share the location of the affected area, photographs and any previous reports so we can discuss your enquiry.