Envirotile Roof Underlay Membrane

The Envirotile Envirolay Roofing Underlay is an essential component for new builds or reroofs, providing high-performance fireproof protection while ensuring compliance with BS 476-3. This Type HR underlay is suitable for a wide range of roof structures, including cold roofs, warm roofs, and solid roofs, and requires ventilation at both high and low levels. Made from flame-retardant woven glass fibre with aluminium foil, it offers excellent nail tear resistance, thermal reflectivity, and durability, helping to reduce heat loss in winter and heat gain in summer. Exova fire-tested and B.R.E. certified, Envirolay delivers long-lasting, reliable underlay performance across all UK zonal areas (1–5).

Key Benefits

• Premier HR fireproof protection, Exova and B.R.E. certified
• Suitable for warm, cold, supported, and unsupported roofs
• High nail tear resistance for durability and longevity
• Reflective aluminium foil reduces heat loss in winter and heat gain in summer
• Ensures compliance with BS 476-3 fire safety standards
• Suitable for all UK zonal areas (1–5)

Technical Specifications

• Length: 25m
• Width: 1.3m
• Colour: Silver
• Material: Flame-retardant woven glass fibre with aluminium foil
• Type: HR underlay
• Application: Ventilated roof spaces (high and low-level ventilation required)