Application
Retaining Wall Waterproofing
Retaining wall waterproofing is typically a positive-side membrane on the soil face, protected before backfill, and coordinated with drainage layers where designed. Petroseal specifies SBS bitumen membranes for flexibility on vertical faces, with careful treatment of construction joints, weep paths, and terminations at coping or slab levels.
Recommended systems
Match site condition to a Petroseal system page.
| Condition | Recommended system |
|---|---|
| External retaining wall | SBS post-applied membrane |
| Jointed walls | Waterstop + membrane |
Technical requirements
- —Continuous coverage to design height
- —Protection against backfill damage
- —Compatible detailing at base and top
Limitations
- —Membrane does not replace structural drainage where required
Application sequence
- Prime wall
- Apply membrane
- Install protection
- Backfill with care
Common failure modes
- —Punctures during backfill
- —Incomplete coverage at base
Related systems
- SBS Waterproofing System
SBS waterproofing systems use styrene-butadiene-styrene modified bitumen membranes for elasticity and low-temperature fl…
- Bitumen Membrane Waterproofing System
Bitumen membrane systems use prefabricated APP or SBS modified sheets torch-welded at laps to form a continuous waterpro…
Related products
- PetroGrip SBS
SBS-modified torch membrane—3mm and 4mm with plain, aluminum, or granular surfacing.
- PVC Waterstoppers
PVC water-stops for watertight concrete construction joints.
Related projects
- LUMS University
Lahore · Education
Technical downloads
- PetroGrip SBS Waterproofing Membrane TDS
Polyester-reinforced SBS-modified torch-applied bitumen membrane — 3 mm nominal thickness, 60/70 bitumen base.
Technical guides
- Basement Waterproofing with Bitumen Membrane Systems
Design and install basement waterproofing with PetroGrip SBS torch membrane and PetroSelfGrip sheets—substrates, laps, protection boards, and Lahore-manufactured systems for nationwide projects.
FAQ
- Do retaining walls need drainage as well as membrane?
- Often yes. Many designs combine membrane waterproofing with drainage composite or gravel drains. Follow the structural and geotechnical design.