Casali 3mm Polyester Sanded Base Layer

Description

The Casali 3mm Polyester Sanded Base Layer is a professional-grade torch-applied waterproofing membrane designed for high-performance multi-layer flat roofing systems. Manufactured using premium APP (Atactic Polypropylene) modified bitumen and reinforced with stabilized non-woven polyester, this membrane delivers outstanding durability, flexibility, and dimensional stability for both commercial and residential roofing applications.

Engineered for use as a base sheet within torch-on waterproofing systems, the membrane features a sanded upper surface for controlled bonding with subsequent layers, alongside a polyethylene burn-off film on the underside for secure torch application.

High-Performance Waterproofing Protection

The advanced APP modified bitumen compound provides excellent resistance to elevated temperatures, UV exposure, and environmental ageing while maintaining reliable waterproofing performance in demanding roofing conditions.

Its reinforced polyester core offers superior tear resistance and dimensional stability, helping to prevent shrinking, stretching, or movement during installation and throughout the lifespan of the roof system.

Key Features & Benefits

• Professional-grade torch-on waterproofing membrane
• APP modified bitumen technology
• Reinforced with stabilized non-woven polyester
• Excellent dimensional stability
• High tear and mechanical resistance
• Sanded top finish for secure interlayer bonding
• Polyethylene burn-off film underside
• Excellent performance in high temperatures
• Suitable for residential and commercial flat roofs

Thermal Performance

Designed to perform in challenging weather conditions, the membrane offers a thermal operating range of:

• -10°C to +130°C

Typical Applications

• Flat roofing systems
• Two-layer torch-on roofing specifications
• Commercial roofing projects
• Residential flat roofs
• Refurbishment and overlay systems
• Waterproofing over concrete, plywood, and compatible insulation boards

Product Specifications

• Thickness: 3mm
• Reinforcement: Stabilized non-woven polyester
• Top Finish: Sanded
• Bottom Finish: Polyethylene burn-off film
• Application Method: Torch-applied
• Bitumen Type: APP modified bitumen membrane
• 10m rolls
• 31kg
• 30 rolls per pallet

Recommended Roofing System

The Casali 3mm Polyester Sanded Base Layer is commonly paired with the Casali Dermabit 4.5mm Mineral Cap Sheet to create a premium two-layer waterproofing system offering exceptional durability and fire performance.

Typical Build-Up

• Base Layer: Casali 3mm Polyester Sanded Base Layer
• Cap Sheet: Casali Dermabit 4.5mm Mineral Cap Sheet

Data Sheet