Breathable Felt Membrane
Breathable felt membranes have evolved from basic roofing underlays into critical components for modern building health, serving as the primary defense against moisture damage across all sectors. In residential homes, where daily activities like cooking and showering generate significant vapor, a high-quality membrane breathable acts as a vital safety valve. It prevents condensation from rotting timber rafters while blocking external rain, a necessity confirmed by housing surveys showing a 70% drop in roof void mold issues when these membranes replace traditional non-breathable felt.
For commercial buildings like offices and retail spaces, maintaining indoor air quality and structural integrity is paramount. A membrane breathable ensures that insulation remains dry, preserving up to 95% of its thermal efficiency. Wet insulation can lose over half its R-value, skyrocketing energy bills; thus, this layer is not just practical but economically essential for operational cost control.
In industrial settings such as warehouses and agricultural sheds, temperature fluctuations cause massive condensation risks. Here, the durability and vapor permeability of a membrane breathable protect sensitive stored goods and steel structures from corrosion. Data indicates that industrial roofs using these advanced felts extend cladding lifespan by 15+ years by eliminating "sweating" effects.
While installation requires care to ensure overlaps are sealed, the material's flexibility allows it to conform easily to complex roof shapes. Ultimately, whether for a garden shed or a factory, this membrane is a non-negotiable layer for long-term asset protection, ensuring buildings breathe properly and stay dry regardless of the environment.
Product Parameters
| Feature | Specification | Core Benefits / Description |
| Dimensions | Width: 1.0m / 1.5m | The 1.5m width significantly reduces horizontal overlaps on roofs, speeding up installation and minimizing leak risks. The 1.0m width is ideal for narrow spaces or small shed repairs. |
| Roll Length: 50m / 100m (Customizable) | ||
| Material Structure | Base: 100% Virgin Polyethylene (PE) + Microporous Breathable Film | Multi-layer co-extrusion using no recycled materials. PE base provides exceptional flexibility in cold weather and superior resistance to acids/alkalis compared to PP, ensuring long-term durability. |
| Weight: 80g/m² – 200g/m² (Customizable) | ||
| Waterproof Performance | Hydrostatic Head: ≥ 2000mm H₂O | Effectively withstands heavy rain, snow, wind, and hail. Prevents liquid water from penetrating insulation or timber frames, ensuring the roof interior stays dry in harsh weather. |
| Description: Superior Surface Water Repellency | ||
| Breathability | Water Vapor Resistance (SD Value): ≤ 0.02m – 0.05m | Extremely low vapor diffusion resistance. Acts as the building's "breathing skin," rapidly expelling indoor humidity to prevent condensation, mold growth, and timber rot. |
| Moisture Transmission: ≥ 1500 g/m²·24h | ||
| Physical Strength | Tensile Strength: MD ≥ 180 N/5cm, CMD ≥ 130 N/5cm | High-toughness design withstands temporary foot traffic during construction, strong wind loads, and structural thermal expansion/contraction without rupturing. |
| Tear Strength: ≥ 25 N (Trapezoid Method) | ||
| Weather Resistance | UV Stability: Safe for Exposure for 2–3 Months | Can be safely exposed to sunlight for 2–3 months before installing outer cladding (tiles/metal) without degrading or powdering. Provides ample buffer for construction schedules in extreme cold or heat. |
| Temperature Range: -40°C to +80°C | ||
| Safety & Eco-Friendliness | Non-Toxic, Odorless, Asbestos-Free | Green building material with no harmful emissions during production. Safe for occupants; select models are recyclable. |
| Installation Accessories | Specialized Breathable Waterproof Tape / Fixing Nail Washers | Used with dedicated accessories to ensure airtight and watertight overlaps, creating a complete, continuous protective system. |
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