Unilin Xtrafall - Tapered Roofing Insulation System

Unilin Xtrafall is a tapered roofing insulation system designed to deliver both thermal performance and bespoke drainage on flat roofs. By combining rigid Polyisocyanurate (PIR) insulation boards with precision‑engineered falls, the system eliminates standing water and the consequent damage often associated with traditional flat roofs. Unilin Xtrafall provides a tapered PIR roofing system with prefabricated elements and multiple facer options, delivering both thermal compliance and bespoke drainage for modern flat roof design.

Product Overview

• Type: Tapered PIR roofing insulation system
• Core: Rigid PIR insulation with foil facings
• Function: Provides thermal insulation and engineered falls for drainage
• Prefabricated Elements: Built to a system including mitred boards, hips, valleys, and other accessories
• Facer Options:
  • XF/ALU – Mechanically fixed
  • XF/BGM – Bonded, torched on
  • XF/MG – Fully adhered

CHARACTERISTICS

• Combines high thermal efficiency with controlled roof falls.
• Factory‑engineered gradients ensure effective water run‑off and eliminate ponding.
• Mitred boards, hips, valleys, and accessories simplify complex roof geometries.
• Supports improved U‑values in line with Building Regulations.
• Available in multiple facers to suit different waterproofing systems.
• Reduces need for screeds or complex on‑site falls, saving time and labour.

APPLICATION

• Warm Flat Roofs: Suitable for new build and refurbishment projects.
• Single‑ply Membranes: Compatible with PVC, TPO, and EPDM systems.
• Bituminous & Liquid Systems: Works with torch‑on, cold‑applied, or liquid waterproofing membranes.

CERTIFICATION

• ISO 9001:2015+A1:2024 Quality Management Systems
• ISO 14001:2015+A1:2024 Environmental Management Systems