Building Waterproofing Solutions

Below-Grade & Foundation Waterproofing

Waterproofing for basement slabs and walls, raft foundations, pile heads, underground parking, sunken courtyards, lift pits and collection sumps. Hydrostatic pressure, substrate continuity and construction sequencing set the system boundary.

Waterproofing SolutionsBuilding Waterproofing SolutionsB02 Below-Grade & Foundation

Applications System routes Build-ups & details Project evidence Decision boundary

Application Scope

One system, several project conditions

These application contexts cover the principal project conditions addressed by this system. The final build-up is defined after the substrate, environmental exposure, movement and service requirements are confirmed.

B02-01 reviewed waterproofing application context

01Basement slabs and external wallsB02-01 · Open evidence and annotated details

B02-02 reviewed waterproofing application context

02Raft foundations and pile headsB02-02 · Open evidence and annotated details

B02-03 reviewed waterproofing application context

03Underground parking and occupied basementsB02-03 · Open evidence and annotated details

B02-04 reviewed waterproofing application context

04Sunken courtyards and connecting structuresB02-04 · Open evidence and annotated details

B02-05 reviewed waterproofing application context

05Lift pits and collection sumpsB02-05 · Open evidence and annotated details

System Logic

Technical routes are connected to conditions

Each application context is connected to the technical routes that match its substrate, installation method, environmental exposure and detailing requirements.

Pre-applied bonded membrane route

Membrane selected for full bond, detailing continuity and resistance to lateral water migration.

Modified bitumen membrane route

SBS or compatible bituminous systems with controlled laps, upstands and protection.

Self-adhesive and cold-applied route

Cold construction options for constrained sites and sensitive interfaces.

Liquid and cementitious route

Coatings and cementitious materials used where substrate geometry and exposure support the route.

Joint and penetration route

Waterstops, hydrophilic profiles, sealants and injection provisions coordinated at construction joints and penetrations.

System Build-Ups & Critical Details

Real application context connected to N/L annotated drawings

Every technical drawing is placed under its mapped application context. L labels identify construction layers; N labels identify critical details and interfaces. Final specifications remain project-specific.

B02-01 Application Context

Basement slabs and external walls

7 annotated drawings

System build-ups and critical details

L-series labels identify build-up layers. N-series labels identify critical nodes and interfaces. Open a drawing to inspect both annotation systems.

External Waterproofing under Basement Raft annotated technical illustration — IMG-059External Waterproofing under Basement Raft6 L labels · 6 N labels

Pre-Applied Fully Bonded Raft System annotated technical illustration — IMG-060Pre-Applied Fully Bonded Raft System6 L labels · 6 N labels

Externally Applied Basement Wall Waterproofing annotated technical illustration — IMG-061Externally Applied Basement Wall Waterproofing6 L labels · 6 N labels

Raft-to-Wall Junction annotated technical illustration — IMG-063Raft-to-Wall Junction6 L labels · 6 N labels

Construction Joint, Post-Cast Strip and Movement Joint annotated technical illustration — IMG-065Construction Joint, Post-Cast Strip and Movement Joint6 L labels · 6 N labels

Wall Pipes, Tie Rods and Sleeves annotated technical illustration — IMG-066Wall Pipes, Tie Rods and Sleeves6 L labels · 6 N labels

Blind Drain, Wall Drainage and Raised Floor Drainage annotated technical illustration — IMG-071Blind Drain, Wall Drainage and Raised Floor Drainage6 L labels · 6 N labels

B02-02 Application Context

Raft foundations and pile heads

5 annotated drawings

System build-ups and critical details

L-series labels identify build-up layers. N-series labels identify critical nodes and interfaces. Open a drawing to inspect both annotation systems.

Pile Head Waterproofing annotated technical illustration — IMG-064Pile Head Waterproofing6 L labels · 6 N labels

B02-03 Application Context

Underground parking and occupied basements

6 annotated drawings

System build-ups and critical details

L-series labels identify build-up layers. N-series labels identify critical nodes and interfaces. Open a drawing to inspect both annotation systems.

Basement Roof and Planted Podium Slab annotated technical illustration — IMG-062Basement Roof and Planted Podium Slab6 L labels · 7 N labels

Basement Car-Park Entrance annotated technical illustration — IMG-068Basement Car-Park Entrance6 L labels · 6 N labels

Podium Equipment Base, Rooflight and Drainage annotated technical illustration — IMG-070Podium Equipment Base, Rooflight and Drainage6 L labels · 6 N labels

B02-04 Application Context

Sunken courtyards and connecting structures

4 annotated drawings

System build-ups and critical details

L-series labels identify build-up layers. N-series labels identify critical nodes and interfaces. Open a drawing to inspect both annotation systems.

Lightwell, Vent Opening and Personnel Entrance annotated technical illustration — IMG-069Lightwell, Vent Opening and Personnel Entrance6 L labels · 6 N labels

B02-05 Application Context

Lift pits and collection sumps

3 annotated drawings

System build-ups and critical details

L-series labels identify build-up layers. N-series labels identify critical nodes and interfaces. Open a drawing to inspect both annotation systems.

Sump, Lift Pit and Recess annotated technical illustration — IMG-067Sump, Lift Pit and Recess6 L labels · 6 N labels

Visual Evidence

Application and project references

Project photographs document real construction conditions. Licensed reference photographs are labelled as context images, with AKWAX-delivered project evidence identified separately.

Below-grade waterproofing detail installation — Membrane installation detail

Waterproofing at a below-grade wall and slab transition — Wall-to-slab continuity

Below-grade waterproofing project reference — Project application reference

Decision Boundary

What must be confirmed before a route is fixed

A system proposal becomes meaningful only after these conditions are documented.

Water table and hydrostatic pressure
Positive-side or accessible-side installation
Construction joints and pile head details
Protection before backfill or reinforcement work
Drainage, dewatering and structural crack risk

Project Discussion

Bring the condition first. The material route follows.

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