Below Grade Waterproofing

Substructure protection for foundations, basements, and retaining walls.

System Overview

Robust waterproofing systems designed to protect structures against groundwater pressure, soil contaminants, and moisture ingress. Our solutions include pre-applied and post-applied membranes, ensuring long-term structural integrity for basements and foundations.

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Typical Layers Diagram

[ SUBSTRUCTURE CROSS-SECTION LAYERS ]

  • Layer 1: Reinforced Concrete Wall/Slab
  • Layer 2: Bituminous Primer
  • Layer 3: Waterproofing Membrane
  • Layer 4: Protection Board (HDPE/EPS)
  • Layer 5: Drainage Composite
  • Layer 6: Backfill Soil

System Advantages

Hydrostatic Resistance

Withstands high water table pressure and prevents capillary action.

Chemical Resistance

Protects concrete from sulfates, chlorides, and other soil-borne chemicals.

Self-Healing Properties

Available membranes with swellable components to seal minor punctures.

Recommended Products

Awazel Proof-HD

Pre-applied Membrane

Awazel Bitumode

Post-applied Sheet

Awazel Waterstop PVC

Joint Protection

Installation Guide

Critical attention to joint detailing and surface preparation is essential for below-grade success.

  • Substrate preparation and cleaning
  • Installation of waterstops at construction joints
  • Membrane application (Pre or Post applied)
  • Protection board installation before backfilling
Download Substructure Guide

Technical Drawings

Raft Foundation Detail

Retaining Wall Detail

Pile Head Treatment Detail

Technical Downloads

Foundation Catalog

Technical Data Sheets

Method Statement

Project References

System Inquiry

Need a customized specification for your substructure project? Our technical team is ready to assist you with design support and product selection.

Request a Technical Call-back