Waterproofing below ground
Curtain injection grouting to waterproof below-grade structures. Create a waterproof barrier behind walls without excavation.
→ No excavation needed
→ Total waterproofing
→ Quick application
→ Permanent solution
Speak to the people who do the work — no call centre, no sales layer.
Curtain injection grouting is the preferred waterproofing method for below-ground structures including basement walls with active leaks, underground carparks with groundwater infiltration, and tunnels experiencing water ingress across Sydney.
TRD Remedial uses acrylamide and polyurethane gel systems specifically formulated for soil stabilization and curtain grouting, providing permanent waterproof barriers. We provide 5-year waterproofing warranties on curtain injection work.
Specialized curtain injection services across Sydney metro: CBD basement complexes, Eastern Suburbs heritage buildings, North Shore residential basements, Inner West industrial facilities.
Waterproof
Guarantee
Penetration

Drill grid of injection holes

Inject gel behind the wall

Gel forms waterproof curtain

Plug holes and finish
Final StepMost curtain injection projects complete in 2-5 days depending on wall area and water pressure conditions.
Yes, when performed correctly with quality gel systems, curtain injection provides permanent waterproofing with a 5-year guarantee.
Curtain injection avoids expensive excavation, protects existing landscaping and structures, and costs 40-60% less than full excavation and membrane installation.
Curtain wall injection typically costs $200-500 per linear meter depending on wall height and groundwater pressure.
Free consultation and on-site assessment. Speak to an engineer today.