SOPRA™ 4897
SOPRA™ 4897
SOPRA 4897 is an SBS-modified bitumen venting base sheet for use in approved multiply membrane and flashing assemblies. SOPRA 4897 is composed of a proprietary formulation of elastomeric styrene-butadiene-styrene (SBS) polymer modified bitumen and is reinforced with a high quality random glass fiber mat. The topside is surfaced with fine mineral aggregate while the underside is surfaced with mineral granules to facilitate venting characteristics.
Product Properties
- Component Base
- Installation Method Mechanically Attached
- Reinforcement Glass Fiber
- Thickness 120 mils (3.1 mm)
- Topside Sanded
- Underside Sanded
Installation
Prior to installation, unroll SOPRA 4897 onto the roof surface and allow to relax. Position SOPRA 4897 in desired position and fasten to nailable substrate. Subsequent approved inter-ply or cap ply membranes are applied to SOPRA 4897 via cold adhesive or heat welding. Refer to the SOPREMA SBS Roofing Guide for additional application guidelines.
Testing & Approvals
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Portland Bridge – Portland, Maine
First Market Tower – San Francisco, California
Multiple SOPREMA systems were installed on this 23,500 square foot project. From the COLPHENE H hot applied, rubberized asphalt system to the use of ALSAN RS for the complex details, there was a solution for every aspect of this project.