Product Overview

Jinsimai supplies breathable waterproof membrane for roofing, exterior walls, and building envelope protection. Designed to resist liquid water while allowing water vapor to pass through, this membrane helps manage moisture in roof and wall assemblies. It is suitable for applications involving steel-frame buildings, timber structures, and insulated exterior walls.

Also known as a waterproof breathable membrane or breather membrane, this material typically combines nonwoven fabric layers with a breathable polymer film. Available specifications, roll sizes, and packaging can be discussed according to project requirements.

Key Features of Breathable Waterproof Membrane

Water Resistance and Vapor Permeability

The membrane is designed to limit liquid water penetration while allowing water vapor to pass through. This balance supports moisture management in suitable roof and wall assemblies. Actual performance depends on the membrane specification and the complete building system.

Support for Building Envelope Protection

When installed in the appropriate position within a roof or wall assembly, the membrane provides a weather-resistant layer behind the exterior finish. Correct installation and compatible construction materials are important for effective protection.

Lightweight Roll Format

Supplied in rolls, the membrane can be handled and cut to suit project dimensions. Installation methods, including fastening and seam treatment, should follow the product instructions and the requirements of the selected building system.

Flexible Specification Options

Jinsimai can discuss available thicknesses, roll dimensions, surface colors, labeling, and packaging according to production feasibility and order requirements.

Technical Specifications

The following table summarizes the currently listed product range. Please confirm the specifications for the exact model before ordering.

Applications of Waterproof Breathable Membrane

Roof Underlayment

For suitable pitched roof systems, the membrane can serve as an underlay beneath roof coverings such as tiles, slates, or metal sheets. The roof design must account for drainage, ventilation, fastening, and the required level of weather protection.

Steel and Timber Frame Walls

In external wall assemblies, a breathable waterproof membrane may be installed behind cladding to help manage moisture and protect underlying layers from weather exposure. Compatibility with the wall design and exterior finish should be checked before installation.

Insulated Building Envelopes

When specified for a compatible system, the membrane can help manage water vapor around insulation layers. Correct positioning is important because the moisture-control requirements vary with climate, insulation type, and wall or roof construction.

Curtain Wall and Rainscreen Systems

The membrane may be considered for suitable wall assemblies where a secondary weather-resistant layer is required behind the exterior cladding. Confirm the product's intended use and performance requirements for the specific system.

How to Choose the Right Breathable Waterproof Membrane

Before purchasing a breathable waterproof membrane, buyers should evaluate more than thickness or roll size. The following checks can help align the product with project requirements.

• Application: Identify whether the membrane is intended for roof underlayment, an external wall, or another building envelope application.

• Water resistance: Check the required water resistance level and the test method used to measure it.

• Vapor permeability: Compare vapor transmission data under consistent test conditions and confirm that it suits the proposed wall or roof assembly.

• Installation requirements: Confirm fastening, overlap, seam sealing, and exposure limits before installation.

• Roll dimensions: Select a suitable width and length to reduce unnecessary cutting and material waste.

• Documentation: Request the relevant technical data sheet and test reports for the product grade being quoted.

Customization and Bulk Supply

Jinsimai supports inquiries for breathable waterproof membrane based on project specifications and order volume. Buyers can discuss available thicknesses, roll widths, roll lengths, surface colors, product labeling, and packaging options.

• Specification review: Share the required dimensions and intended application.

• Sample requests: Ask about material sample availability before placing a bulk order.

• Packaging: Protective wrapping and other packaging arrangements can be discussed according to the order.

• OEM labeling: Available upon request, subject to confirmation.

• Quotation: Pricing, minimum order quantity, and production lead time are confirmed according to specifications and order volume.

For related products, visit the waterproof material category to explore other waterproofing options.

Frequently Asked Questions

1. What is a breathable waterproof membrane used for?

It is used in suitable roof and wall assemblies to resist liquid water penetration while allowing water vapor to pass through. Common applications include roof underlayment and external wall systems.

2. Is a waterproof breathable membrane suitable for metal roofs?

It may be suitable as an underlay in compatible metal roofing systems. Confirm the required temperature resistance, water resistance, installation method, and exposure conditions before selection.

3. Can this membrane be customized?

Available options may include thickness, roll width, roll length, surface color, labeling, and packaging. Confirm feasibility and minimum order requirements with Jinsimai.

4. How should the membrane joints be installed?

Overlap and sealing requirements depend on the product and building system. Follow the relevant installation instructions and use compatible fastening or sealing materials.

5. Can the membrane remain exposed to sunlight?

Do not assume that it is suitable for long-term exposure. Confirm the permitted UV exposure period for the selected product and install the required protective finish.

Request a Quote for Breathable Waterproof Membrane

Looking for a breathable waterproof membrane for a roofing or exterior wall project? Send Jinsimai your required specifications, estimated order quantity, intended application, and destination market.

Our team can review the requirements and confirm available specifications, sample options, packaging, pricing, and estimated production lead time.

Contact Jinsimai to discuss your project requirements and request a quotation.