10/15/2026
Over the years, we have had an ongoing battle over whether spending additional money to waterproof concrete in Florida is necessary, and more importantly, when it makes sense.
Waterproofing concrete can be an important part of protecting your building. However, it is not a substitute for proper concrete design, drainage, maintenance, or repairs.
Waterproofing will not repair deteriorated concrete. If a system is installed without first inspecting the concrete and identifying existing conditions, it may hide symptoms without correcting the underlying problem. If the necessary repairs are not completed before waterproofing, the system could trap moisture, interfere with drying, or make an existing problem worse.
When Properly Selected and Installed, Waterproofing Can:
Help protect reinforcing steel from corrosion by limiting water and chloride intrusion.
Reduce water intrusion into occupied spaces.
Assist in managing groundwater and soil moisture.
Protect vulnerable building components and potentially extend their useful service life.
The key words are properly selected and installed. Not every waterproofing system is appropriate for every application, and not every concrete surface requires the same level of protection.
What Should You Consider Before Spending the Money?
Waterproofing systems come with installation costs, service-life limitations, and maintenance requirements. Some require the removal of existing finishes, protective layers, or drainage components. Others may require periodic inspections, repairs, or replacement to maintain their effectiveness.
Applying a new system prematurely, without addressing existing conditions or establishing a long-term maintenance plan, can waste money and potentially create additional problems.
Every system should have manufacturer documentation explaining where it can be used, how it must be installed, what conditions it is designed to withstand, and how it must be maintained. Make sure you receive and retain these documents before approving the work. They are part of your building's maintenance records and may be important years down the road when repairs or replacement become necessary.
Before committing to the expense, understand what problem the proposed system is intended to solve, whether the concrete needs repairs first, and what happens if the waterproofing is not installed.
What About Building Exteriors, Balconies, Elevated Walkways, and Parking Garages?
These areas deserve particular attention because water intrusion can affect more than the appearance of the concrete. Moisture and chlorides can contribute to reinforcing steel corrosion, concrete deterioration, and damage to surrounding building components.
Applicable Florida Building Code provisions address waterproofing and impervious moisture-barrier systems in certain applications, including details and inspection requirements where these systems protect structural framing. The specific requirements depend on the building, the assembly, and the applicable code provisions.
This is where professional evaluation matters. The decision should be based on the actual conditions, the exposure to water, the consequences of water intrusion, and the requirements applicable to that particular assembly.
The LCM Bottom Line
In Florida, controlling water and keeping it out of vulnerable building assemblies is important. But waterproofing every single piece of concrete is not necessarily good engineering or smart financial management.
Our job is to help property managers and Boards understand where the money needs to be spent, why it needs to be spent, and what can happen if the work is not done.
The goal is to control water where it matters, protect reinforcing steel, correct the sources of water intrusion, and select a system that can perform under the actual conditions it will face.
Sometimes waterproofing is an important investment. Sometimes other repairs or improvements need to come first. And sometimes the proposed system may not be necessary at all.
The answer should come from the building's condition, the engineering, and the facts—not simply from a recommendation to waterproof everything.
At LCM, we believe in helping Boards make informed decisions, protecting their buildings, and spending association funds wisely. It is not about spending the least amount of money today. It is about spending the money where it will do the best over the life of the building.