Pavatex LDB DUO – Breathable Sarking Membrane
Highly vapour‑open, weather‑resistant sarking membrane with two integrated self‑adhesive strips.
PAVATEX LDB DUO is designed as an external airtight and windtight layer for warm roof build‑ups, providing secondary weather protection above insulation boards such as PAVAFLEX or ISOLAIR. Its high breathability allows safe outward drying while maintaining airtightness on the cold side of the structure.
The membrane is laid directly over the insulation or sheathing, with the airtight seal formed by the dual integrated self‑adhesive strips along the longitudinal edges. Transverse joints, penetrations and connections are sealed using PAVATEX system accessories to ensure a continuous airtight and windtight envelope.
When mechanically fixed, PAVATEX LDB DUO can be left temporarily exposed to the weather for up to 3 months, providing robust protection during the construction phase.
• Highly vapour‑open, windtight and airtight sarking membrane
• Dual integrated self‑adhesive strips for rapid, secure joint sealing
• Temporary weather protection for up to 3 months
• Fully compatible with PAVATEX insulation systems and covered by the Pavatex system guarantee
Size:
Supplied in 1.5 m x 50 m rolls (75 m²).
Characteristics:
Material three-layer polypropene composite
Thickness [mm] 0,60
Specific mass [g/m2 ] 150
Water vapour diffusion equivalent (Sd) [m] 0,05
Resistance to water penetration W1
Flexibility at low temperature [°C] ≤-20
Temperature resistance [°C] -40/+100
Tensile strength (L/T) [N/50 mm] 260/180
Elongation at maximum tensile strength (L/T) [%] 60/50
Resistance to tearing (nail shank) (L/T) [N/50 mm] 180/200
Reaction to fire (EN 13501–1) E
Minimum installation temperature [°C] -5
