Waterproofing Membrane Systems
RAHA Gilsonite Co. supplies high-performance bitumen waterproofing membranes for roofing, foundations, tunnels, and below-grade structures.
Waterproofing membranes are sheet materials applied to building structures to prevent water ingress and moisture penetration. Our waterproofing membranes are manufactured from high-quality oxidized bitumen and polymer-modified bitumen (APP/SBS), reinforced with polyester, fiberglass, or composite carriers, ensuring superior performance in the most demanding conditions.
Types of Waterproofing Membranes
| Type | Base Material | Installation | Best Application |
|---|---|---|---|
| Torch-Applied | APP / SBS | Heat fusion | Roofing, foundations |
| Self-Adhesive | SBS | Peel and stick | Below-grade, green roofs |
| Cold-Applied | Oxidized Bitumen | Brush/roller | Foundations, retaining walls |
| Mechanically Fixed | APP / SBS | Fasteners | Exposed roofing |
Key Applications
Roofing Waterproofing Flat and low-slope roof systems, Green and vegetated roofs, Terrace and balcony waterproofing, Inverted roof assemblies.
Below-Grade Waterproofing Basement and foundation walls, Underground parking structures, Elevator pits and lift shafts, Retaining walls and planters.
Civil and Infrastructure Tunnel linings and portals, Bridge decks and abutments, Water reservoirs and tanks, Culverts and drainage structures.
Industrial Applications Chemical storage tanks, Wastewater treatment plants, Industrial floor waterproofing, Secondary containment systems.
Technical Specifications
| Property | Standard Grade | Premium Grade | Test Method |
|---|---|---|---|
| Thickness | 3 mm | 4–5 mm | EN 1849-1 |
| Mass per unit area | 3.5 kg/m² | 5.0 kg/m² | EN 1849-1 |
| Tensile strength (L/T) | 600/400 N/50mm | 900/700 N/50mm | EN 12311-1 |
| Elongation (L/T) | 40/40% | 50/50% | EN 12311-1 |
| Tear resistance | 100/80 N | 150/120 N | EN 12310-1 |
| Cold flexibility | -5°C | -15°C | EN 1109 |
| Heat resistance | 100°C | 120°C | EN 1110 |
| Water impermeability | Pass (200 kPa) | Pass (400 kPa) | EN 1928 |
Advantages
- ✅ Complete waterproofing protection — zero water permeability
- ✅ Flexible and crack-bridging — accommodates structural movement
- ✅ Easy installation — torch, self-adhesive, or cold-applied
- ✅ Durable — 20–30 year service life
- ✅ Compatible with all standard insulation systems
- ✅ Available in various thicknesses (2–5 mm)
- ✅ Root-resistant grades available for green roofs
Quality Standards
- EN 13707 — Reinforced bitumen waterproofing sheets for roofing
- EN 13969 — Bitumen damp proof sheets
- EN 13970 — Bitumen vapour control layers
- ASTM D1970 — Self-adhering polymer modified bituminous sheet materials
