Izoperm Plus
Reinforced interior air and vapour control membrane — phA-certified, Sd 5 m, for warm-side use in walls, ceilings, and roofs.
$152.25
Lead Time: 5 business days
Shipping: Quoted after checkout
IZOPERM PLUS is a reinforced interior airtight and vapour control membrane installed on the warm side of insulation in roof, wall, ceiling, and floor assemblies.
What it does
It acts as both the airtight barrier and the vapour check, regulating moisture flow into the assembly and keeping conditioned air inside. The reinforced carrier resists nail-tear and tensile loads during install and over the building's life.
When and where to use it
- Warm-side air and vapour control in pitched and flat roofs
- Wall and ceiling airtight layers in timber-frame, masonry, and steel construction
- Both onsite and offsite (CLT/SIPS/modular) construction
- Warm, cold, and hybrid roof configurations
Key benefits
- Air permeance <0.01 m³/(m²·h)
- phA Passive House Institute certified
- Sd value 5 m — strong vapour control while still allowing controlled drying
- Class W1 watertight
- Reinforced — tensile MD 285 / CD 385 N/5 cm
- CE, UKCA, EPD, LCA documented
Format
0.75 m × 50 m, 1.5 m × 50 m, and 3 m × 50 m rolls (37.5–150 m²).
Unit
| Length | 164.04 ft |
| Width | 29.52 – 59.04 in |
Key Specifications
| Property | Specification |
|---|---|
| Membrane Type | Mechanical |
| Square Feet | 404, 807 |
| Rolls per Pack | 1 |
Material Health & Certifications
Professional Grade
Built for building professionals
Fast Shipping
Direct from manufacturer
Tech Support
Expert installation guidance
Certified Performance
Tested and documented
