fbpx tag:

How prolonged rain can affect your building

Leaking basement after heavy rain - Waterstop Solutions

How prolonged rain can affect your building

Water Intrusion When It Rains

Many properties are feeling the effects of the persisting heavy rainfall we recently have had on the South East Coast. Prolonged rainstorms cause many buildings to leak and we see many kinds of situations from minor seepage issues to more distressing situations where below-ground living areas are several centimetres deep in water. A large number of multilevel buildings have overflowing lift pits, wet basements, car parks, and leaking roofs and balconies.


Does Insurance Cover Water Intrusion?

Based on conversations with some of our clients about whether a water intrusion damage is covered by insurance or not,  highlights that there seems to be a grey area to navigate. Generally, insurance policies are designed to cover sudden and accidental damage, so they may only cover damage that has been caused by a sudden and unforeseeable weather event as a direct effect of wind, hail, storm and flash flood. (If you live in a flood-prone area, it is best to check with your insurance provider to find out if your property is covered.)

This means that many insurance policies may not cover water damage as a result of water penetration by failing waterproofing that is caused over time due to normal rainfall because the damage should not be a result of a damage developed over time due to for example:

  • Building deterioration
  • Damage caused by seepage coming through cracks in the foundation or at the exterior of the building
  • Poor repairs or evidence of lack of repairs to the building in general in addition to pipes, taps, roof, roof parts and electrical wiring.


If your property is managed by a body corporate, the body corporate is required to hold a property insurance and is responsible for all common areas and the structural elements of the building. Find more information related to flood insurance shared by Strata Care and Smart Strata:




How Prolonged Rain Can Affect Your Building

Water leaking into the basement after heavy rain is a common occurrence. Water always finds a way, so basement waterproofing and adequate drainage are especially needed in cases where groundwater is likely to build up in the soil and cause a rise in the water table closer to the surface.

Underground car parks, basements, lift pits and even buildings that are cut into a hillside (making them partially subterranean) are often subject to increased hydrostatic pressure during a heavy or prolonged rainstorm. The hydrostatic pressure from the rising water table and the lateral pressure from saturated soil are pushing the excess water into basements slabs, foundation and retaining walls making them susceptible to water ingress through cracks, porous building materials, holes, joints and/or inadequate waterproof system.

An important note is that even if the waterproofing system is in perfect condition, water can still enter the property through the cold joints around the perimeter of the slab due to the increased hydrostatic pressure. Water ingress in the floor to wall joint is commonly experienced during heavy rain due to the rising water table bringing the groundwater closer to the surface. This increases the hydrostatic pressure on the slab of your building and it can force water to pass through the construction joint between the floor and the wall so that this joint effectively begins working as a highway passage for water.

We often see in Brisbane and Sydney areas that buildings that are cut into a hillside stand a greater risk of having the “hillside side” affected by hydrostatic and lateral pressure if adequate steps to redirect the water are not taken. Poor drainage may cause water to collect against a concrete foundation and retaining walls during heavy and persistent rain events and may build up the volume to cause problems attributable to lateral and hydrostatic pressure. Steps taken to direct water flow away from basements/foundations and eliminate pooling will reduce the chances of water build up around the building.


Tips On How To Keep Water Away From The Basement Structure:

  • Inspect the walls and floors. If cracks appear, repair or seal them immediately. Water has a way of finding a small entryway and then making it bigger over time.
  • Install gutters and downspouts away from the foundation.
  • Ensure that the ground has a graded fall that guides water away from the foundation.
  • A drainage layer of gravel eliminates trapping water-laden soil against foundation walls.
  • Ensure that the drains below the slab direct water effectively to a stormwater system.
  • Ensure that the interior basement waterproofing is intact to prevent water ingress. Wall to floor joints in infill slabs and retaining walls often act at basement leakage points. This can cost-effectively be remediated with a targeted high-pressure injection of resin into cracks and joints to create a deep waterproof seal, membrane repair/refurbishment or protective coating application.


At Waterstop Solutions, we specialise in interior basement waterproofing systems

A wet basement can be treated by targeted high-pressure injection into the wall-floor joint and/or into vertical joints, such as between contiguous piles. The injected hydrophilic polyurethane liquid chases the water deep into cracks and forms a flexible watertight seal. This remedial waterproofing treatment can be followed by the application of an epoxy coating or a negative side membrane.

The waterproofing membrane systems we use create an effective barrier against waterborne salts. They are also resistant to atmospheric gases and comply with potable water safety standards.

The systems are supported by the manufacturer’s warranty for 10 years, which is extendable to a further 10 years with a maintenance application.

Our highly-skilled technicians frequently perform remedial high-pressure leak-sealing injections to stop water from seeping into building structures. Whilst other remedial companies may average once a year (or at most once a month), our technicians perform quality high-pressure leak-sealing injection work several times per week.

𝗕𝗼𝗼𝗸 𝗮𝗻 𝗶𝗻𝘀𝗽𝗲𝗰𝘁𝗶𝗼𝗻 𝘄𝗶𝘁𝗵 𝗼𝗻𝗲 𝗼𝗳 𝗼𝘂𝗿 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲𝗱 𝗶𝗻𝘀𝗽𝗲𝗰𝘁𝗼𝗿𝘀 𝘁𝗼𝗱𝗮𝘆!

... We will happily assist with any water ingress issues in concrete structures and concrete defect repairs.


You May Also Be Interested In These Topics:

What problems can a leaking lift pit cause?

Description of flat rooftop membrane renewal

Leaking balcony repairs of defective waterproofing

Cold and wet weather can cause leaks and seepage

If you have any issues with water ingress, rooftop leaks, leaking balcony, leaking basement, cracking concrete slabs, structural cracks, concrete deterioration, deteriorated joints, moisture, seepage, efflorescence, rising damp and/or high-flow active leaks in concrete structures, we would be happy to assist you. You are welcome to contact us with any questions that you may have.

Brisbane office: (07) 3205 1899   


Sydney office: (02) 9346 8308   

Email: [email protected]



Are you interested in finding out more about the various remedial building services we are providing?

Please click on the image below to download Waterstop Solutions Capability Statement

Waterstop Solutions Capability Statement

Waterstop Solutions Capability Statement is now available to download as PDF. (The image is clickable and opens up a link to our Capability Statement). 




Good maintenance begins with a proactive approach to maintain, keep, preserve and protect a building. 

Remember that seepage/water ingress into areas such as balconies, basements, concrete roofs, car parks and retaining walls, should not be ignored – call a remedial waterproofing professional today for an assessment to provide you with the best solution for your situation.

At Waterstop Solutions, we carry out a wide range of remedial works to concrete structures post-construction stage in Brisbane, Gold Coast, Sunshine Coast, Sydney and outlying areas in Queensland and New South Wales.

Equipped with major civil works experience, we can quickly determine the best approach to rectify all seepage and concrete deterioration issues.


It takes licenced remedial waterproofer and leak sealing experts like us at Waterstop Solutions to ensure that the pathways for water to ingress are properly sealed off. A depth of technical knowledge and experience, along with a proud reputation for integrity and reliability, has made Waterstop Solutions the go-to company for many Defect Managers working for major construction companies across Queensland and New South Wales.

We at Waterstop Solutions have the technical and practical expertise to diagnose the source of the leak and will provide you with our recommended solution to achieving an effective, high-quality, long-lasting repair to stop the water ingress with minimal disruption

We believe in and are committed to always delivering high-quality solutions by utilising the right products and techniques for each specific project combined with our industry-leading know-how on tap. We have a large talent pool of specialist leak sealing and concrete repair technicians with Certificate III in construction waterproofing in Queensland and New South Wales that are extensively trained in our systems and project execution methods.

The leadership positions on every Waterstop Solutions project are operated by highly qualified, certified and experienced industry professionals. Our in-house skills and expertise gained from more than 60 years of industry experience provide a full range of high-quality remedial waterproofing and concrete repair works to commercial buildings, civil infrastructures, industrial sites and residential properties. From waterproofing diagnostics, preventative and remediation solutions – All of our waterproofing solutions are quality guaranteed.



Contact Us