Infrastructure
PVC waterproofing for tunnels, bridges and heavy civil works — membranes engineered for structures built to last a century.
One System, Built to Work Together.
Infrastructure waterproofing has no tolerance for failure: tunnels, cut-and-cover structures and bridge decks are sealed once, then buried under concrete or traffic for generations.
Loose-laid PVC systems with protection fleeces conform to complex geometry, bridge cracks, and take the abuse of reinforcement fixing and concreting above.
- Road and metro tunnels
- Cut-and-cover structures
- Bridge decks and abutments
- Culverts and underpasses
- Utility galleries and shafts
Layer by Layer.
- 01
Substrate Preparation
Shotcrete or structural faces trimmed and prepared for the lining works.
- 02
Protection Fleece
A heavy geotextile cushions the membrane against substrate roughness.
- 03
PVC Waterproofing
The PVC membrane, welded into a continuous liner across the structure.
- 04
Protection Layer
Boards or a second fleece shield the liner during reinforcement and concreting.
- 05
Structural Lining
The final concrete lining is cast against the protected waterproofing.
01Generational Service Life
Polymer liners engineered for the design lives that infrastructure demands.
02Conforms to Complex Geometry
Loose-laid sheets follow curves, junctions and irregular excavated faces.
03Bridges Structural Cracks
Unbonded membranes span movement and cracking in the substrate behind them.
04Verified Before Burial
Weld testing and compartment systems prove integrity before concrete covers the work.
Common questions about this system.
Where is the Infrastructure system used?
It is typically used for road and metro tunnels, cut-and-cover structures, bridge decks and abutments, culverts and underpasses and utility galleries and shafts.
Which Insutech products are used for infrastructure?
The recommended system is built with PVC BAT — Basements, TPO/FPO Roofing Membrane, PVC SE — Exposed Roofing and Insuboard Protection Board — full details for each are on the recommended products cards on this page.
How is the system installed?
The system is installed in 5 stages: substrate Preparation, protection Fleece, PVC Waterproofing, protection Layer and structural Lining. The system build-up section on this page illustrates the full sequence.
What are the main advantages of the infrastructure system?
The key advantages are generational Service Life, conforms to Complex Geometry and bridges Structural Cracks — each is explained in the Key Benefits section on this page.