House Wrap Breathable Membrane

Thank you for choosing Xiashi Packing as your manufacturer and supplier; we are proud to offer high-quality House Wrap Breathable Membranes.

This material is specifically engineered for steel-structure roofing, wall insulation, light-gauge steel villas, pitched roofs, and curtain wall buildings. It provides a dual function—being waterproof yet vapor-permeable—thereby safeguarding the building's insulation layer to ensure long-term dryness and energy efficiency.

What is a House Wrap Breathable Membrane?

A House Wrap Breathable Membrane is a specialized construction material—waterproof yet vapor-permeable—developed and manufactured by the Chinese firm, Xiashi Packing.

In terms of composition, this material features a multi-layer composite microporous structure made from Polypropylene (PP) and Polyethylene (PE).

Through the combination of high-quality raw materials and mature manufacturing processes, the material delivers powerful waterproofing, highly efficient vapor permeability, wind resistance, energy savings, and exceptional durability and aging resistance.

It is suitable for use in steel-structure roofing, light-gauge steel villas, timber-frame houses, curtain walls, and insulation systems to provide effective vapor control and moisture protection.

Working Principles

1. Waterproofing Principle

The House Wrap Breathable Membrane features a high-density microporous structure. The diameter of these micropores is significantly smaller than that of liquid water droplets; consequently, rainwater, melted snow, and condensation cannot penetrate the membrane, thereby ensuring highly effective waterproofing and leak prevention.

2. Breathability Principle

Conversely, the diameter of the micropores is significantly larger than that of water vapor molecules. This allows moisture generated within the building interior to freely escape outward in a gaseous state, preventing moisture from becoming trapped within the walls, roofing, and insulation layers.

3. Windproofing and Thermal Insulation Principle

The membrane material forms a dense, continuous barrier that blocks air convection and minimizes the penetration of cold and warm air. When used in conjunction with an insulation layer, it effectively retains thermal energy, thereby enhancing the building's energy efficiency.

Product Features

1. Unlike ordinary roofing membranes—which are waterproof but impermeable to air—our Jinbo House Wrap Breathable Membrane offers both high-strength waterproofing and highly efficient vapor permeability, ensuring the insulation system remains fully effective.

2. The product features a micron-scale microporous structure: raindrops are too large to penetrate, while smaller water vapor molecules can freely pass through.

3. During installation, the membrane can be laid directly over the exterior of the insulation layer; simple overlapping and fastening are all that is required. This process is straightforward enough for any standard contractor to execute, saving both time and labor by eliminating the need for complex installation procedures.

Our Advantages

When you partner with Xiashi Packing, you benefit from direct-from-factory pricing—free of any middleman markups. We maintain ample stock inventory, and for standard orders, we typically process and ship your goods on the very same day the order is received.

Additionally, we offer customization options for width, gram weight, and roll specifications. We can also provide private labeling and logo printing services upon request, catering to the diverse requirements of various engineering projects and distribution channels.

Throughout the entire consultation and order fulfillment process, we provide expert product selection recommendations, guidance on construction details, and on-site technical support. We also offer complimentary standard construction plans and installation guidelines, serving as your reliable and attentive partner.

Product Delivery

Test Report

Common Issues and Solutions in Construction Projects

Issue 1: The membrane is easily scratched or torn during installation.

Before laying the membrane, clear away any protruding studs, nails, or burrs. On windy days, ensure the membrane is secured immediately to prevent flapping and tearing; whenever possible, avoid walking directly on the membrane surface.

If necessary, place wooden boards over the membrane to provide a walking surface. Minor damage can be easily repaired using specialized butyl tape or tape specifically designed for breathable membranes.

Issue 2: Water leakage or air infiltration at overlap joints.

We recommend an overlap margin of no less than 10 cm for both horizontal and vertical joints. The overlap seams must be fully sealed and firmly pressed down using the corresponding sealing tape. Additionally, inside corners, outside corners, and openings should undergo reinforced treatment to ensure a double-layer seal.

Issue 3: Condensation or mold growth occurring indoors or within the wall structure.

Identify the Markings: The non-woven side—or the side bearing the product markings—must face the interior, while the smooth side faces outward. Ensure the membrane remains continuous and intact, avoiding arbitrary punctures or the creation of large openings; this guarantees the existence of ventilation channels within the roof or wall assembly, allowing moisture to be expelled effectively.