Protection waterproofing membrane FM

for roofbarrierfor renovation

Overview
RENOLIT ALKORPLAN FM approved single ply waterproofing assemblies are complete roof systems that include RENOLIT ALKORPLAN single-ply membranes and the ancillary components tested as part of the assembly. These systems provide verified performance for fire exposure, wind uplift, hail impact and heat-related degradation, supporting specification, regulatory compliance and risk mitigation for building projects.

FM approval and testing
FM Approvals assesses the full roof assembly under the FM 4470 standard. Evaluations test the combined behaviour of membrane, vapour control layer, insulation, fixings, adhesives and accessories. Approved assemblies demonstrate resistance to fire, wind uplift, hail damage and heat effects and are documented for use where insurer or code compliance requires FM approval.

Benefits

• Support specification that meets insurer and code requirements
• Potential to reduce insurance premiums when installed per tested assembly
• Verified performance against fire, wind uplift and hail
• Improved predictability of long-term behaviour in adverse conditions
• Facilitates clear documentation for tenders and approvals

Typical components of an FM approved assembly

• Waterproofing membrane (RENOLIT ALKORPLAN single-ply membranes)
• Vapour control layer / vapour barrier
• Insulation panels
• Mechanical fixings, adhesives and fasteners specified in the tested assembly
• Walkways and accessories where specified

Most used accessories (examples shown on the page)

• RENOLIT ALKORPLAN Classic (plasticised PVC-P single-ply membrane)
• RENOLIT ALKORPLAN Slip Resistant Walkway (high-friction walkway membrane)
• RENOLIT ALKORPLUS Vapour Control Layer (vapour barrier)

FAQs — key points

• What does FM Approved mean? — The complete roofing assembly has been tested and certified by FM Approvals to meet FM 4470 performance criteria (fire, wind uplift, hail, etc.).
• What components are tested? — The entire system including membrane, vapour barrier, insulation, fixings and adhesives is tested as an assembly.
• Can FM approved systems be used on new and refurbished buildings? — Yes, when installed according to the tested assembly and FM documentation.
• Does FM approval cover fire performance? — Yes; FM testing includes fire exposure and resistance to flame spread as defined in FM 4470.

Technical characteristics / specifications

• Relevant standard: FM 4470 (system-level testing for single-ply roof assemblies)
• Tested performance aspects: fire resistance, wind uplift resistance, hail damage resistance, susceptibility to heat damage and related durability checks
• Assembly scope: full system testing (membrane + VCL + insulation + fixings/adhesives)
• Intended applications: new construction and retrofit projects when installed per the tested assembly
• Expected outcomes: verified system performance, enhanced safety and potential insurance premium benefits