Overcoming Concrete Roof Leakage in Sydney
When Soprema was called in to renovate a leaking concrete roof in Sydney, it took on the challenge to reinstate the roof waterproofing and deliver a headache-free roof system for the future. The building in question had been plagued with leakages for many years, despite several previous rectification attempts.
The Waterproofing Challenge: Fall, Condensation, and Weight
The renovation solution was complex due to three primary issues. First, there was insufficient fall in the concrete roof slab. Second, there was a risk of interstitial condensation. Finally, the new solution could not add excessive weight to the existing roof structure.
Soprema, collaborating with remedial professional Wayne Lloyd of Enduroflex Pty Ltd and Certified Applicators from Redback Waterproofing Pty Ltd, designed a long-term solution.
The Solution: Tapered PIR Insulation and DuO Waterproofing
The insufficient fall was corrected by installing a high-quality tapered polyisocyanurate (PIR) insulation board. This lightweight material reinstated the falls without compromising the structural integrity of the roof slab. The existing waterproofing was retained to serve as a vapour barrier under the new thermal layer, creating an efficient ‘warm roof’ concept.
To stop leakages once and for all, a two-layer DuO waterproofing system was installed, featuring:
- DeboTack 2.5 T/F C175 Aero: A partially bonded, self-adhesive base sheet.
- DuO High Tech Firecare: A fire-retardant membrane finished with aesthetic anthracite granules.
Key Benefits for the Building Owner
- Elimination of Ponding: New falls ensure water drains correctly.
- Energy Savings: Added thermal insulation provides a return on investment via lower energy bills.
- Fire Safety: Increased protection with the DuO Firecare membrane.
- Material Warranty: An insurance-backed material warranty provided by the manufacturer.
By combining engineering support, quality Soprema materials, and experienced applicators, this project proves that even chronic leakage headaches can be solved forever.
Source: Project case study and technical specifications provided by Enduroflex Australia.