Cartonal
Cartonal is a semi‑flexible multilayer polypropylene board used as a mechanical protection layer for waterproofing membranes, especially on roofs and floors exposed to backfilling or pressure.
📐 Technical Specifications
Material: Polypropylene (PP)
Standard dimensions: 1 m × 2 m
Thickness: 5 mm (or as required)
Color: Grey or blue
Internal structure: Multilayer with vertical support ribs every 4 mm
Flexibility: Semi‑flexible – easily shaped on uneven surfaces
Chemical resistance: Resistant to oils, acids, alkalis, and salts
🛠️ Common Applications
Protection of waterproofing membranes (bitumen, PVC, HDPE)
Separation layer between waterproofing and backfill in roofs and foundations
Alternative to protective bricks in roof insulation
Protection of waterproofing in underground tanks and tunnels
✅ Advantages of Cartonal
Lightweight and easy to install
Unaffected by moisture or thermal changes
Resistant to common construction chemicals
Protects membranes from tearing or puncture during backfilling
Reduces execution time and cost compared to traditional solutions
⚠️ Important Notes
Overlap boards by 3–5 cm during installation
Install directly over waterproofing before backfilling or casting
In hot‑applied waterproofing, allow Cartonal to bond with the membrane when tacky
Recommended to be installed by specialized technicians to ensure full coverage
See also: Polyethylene tarpaulin
