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Case Study

Case Study: Flood Damage Restoration | A Leading Specialist College in Dormana

How our IICRC-aligned crew contained, stripped and dried a leading specialist college in Dromana after floodwater damaged classrooms, offices and shared spaces.

3 min readBy Detail Facility Team

Project Overview

In early April 2024, a severe storm swept across the Dromana region, bringing heavy rainfall that caused widespread flooding. One local specialist school was heavily affected when the external drainage system became overwhelmed, and stormwater began seeping underneath classroom doors. Within hours, several classrooms, offices, and common areas were soaked, and the flooring materials and lower wall linings were holding significant moisture.

Our restoration team was called to assist immediately after the incident. Upon arrival, we conducted a detailed assessment of the site and found extensive water ingress across multiple rooms, including classrooms, the kitchen, withdrawal spaces, and the art room. Moisture readings confirmed that many areas were saturated, with carpets, underlays, and wall linings affected by muddy stormwater. This level of contamination classified the event as Category 3 (CAT3) stormwater damage, which required strict hygiene and environmental control procedures to ensure a safe and thorough restoration.

Muddy stormwater ingress across classroom carpets at a specialist college in Dromana after the April 2024 flood event
Initial site assessment — muddy stormwater across classrooms, offices and shared spaces.

Restoration Approach

To stabilise the internal environment, we introduced HEPA-filtered air scrubbers and placed the affected zones under negative air pressure. This helped control airborne contaminants and maintain safe air quality while our teams worked. Electrical and plumbing services were isolated where necessary to ensure safety throughout the process.

HEPA-filtered air scrubber operating on carpeted classroom floor under negative air pressure containment
HEPA-filtered air scrubbers established negative air pressure across affected zones.

Next, we removed all damaged building materials, including saturated carpets, underlays, skirting boards, and sections of plasterboard and insulation that showed signs of water absorption. The removal was completed to approximately 300mm from the floor where moisture was detected. After clearing these materials, all exposed wall frames and subfloors were meticulously cleaned and disinfected to eliminate bacteria and prevent mould development.

Controlled strip-out of saturated plasterboard, insulation and skirting to 300mm exposing timber wall framing for cleaning and disinfection
Controlled strip-out to 300mm — exposed framing cleaned and disinfected.

Once the contaminated materials were removed and surfaces were sanitised, we began the structural drying phase. A combination of air movers, dehumidifiers, and air filtration devices was strategically installed throughout the affected areas. These units worked together to increase airflow, reduce humidity, and accelerate evaporation. Moisture readings were taken regularly, and adjustments were made as necessary to ensure consistent and effective drying.

Structural drying setup with air movers, dehumidifiers and HEPA filtration operating inside a sealed containment zone
Structural drying with air movers, dehumidifiers and HEPA filtration units.

We maintained environmental controls throughout the entire process. The containment and HEPA filtration systems remained in operation for a minimum of 24 hours after all drying works were completed to ensure the air remained clean and that no residual contaminants were present. Daily site monitoring allowed us to track progress and confirm that the structure was drying evenly and safely.

HEPA containment corridor with plastic sheeting and air mover during daily moisture monitoring at the Dromana school restorationExposed wall framing below a classroom window after strip-out, ready for the structural drying and monitoring phase

Project Outcome

By the conclusion of the project, the building was fully stabilised, with moisture readings returning to normal levels. All affected materials were removed and disposed of safely, and the internal spaces were restored to a clean, dry, and hygienic condition. The school was then ready for reinstatement works to return the classrooms and shared spaces to their normal use.

Restored classroom corner with new dark carpet, cleaned walls and window ready for reinstatementRestored open teaching area with new carpet, cleaned walls and stabilised environmentRestored withdrawal space with fresh wall linings, coat rack and dry carpet ready for return to service
Wide view of the fully restored specialist college classroom with dry carpet, repainted walls and stabilised environment after CAT3 stormwater restoration
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