- Integrated 3D drainage mat — separates underlay from metal cladding to prevent contact corrosion
- Designed for reactive metal roofing — suitable under zinc, aluminium, stainless steel, copper and galvanised steel
- Fire retardant — complies with NZBC C/AS2–C/AS6 surface finish requirements
- Self-supporting — suitable for use without additional netting support
- Self-adhesive lap strip — integrated adhesive strip for fast, weathertight overlaps
Ventia Metal with Drainage Mat is a four-layer roof underlay with an integrated 3D drainage mat, specifically designed for use under titanium zinc, aluminium, stainless steel, copper and galvanised steel metal roofing. The separation layer prevents direct contact between the underlay and reactive metal cladding, protecting against corrosion and allowing condensation to drain freely.