Breathable Roofing Membrane

Produced by Xiashi Packing Co., Ltd., the breathable roofing membrane is a professional PP/PE/PP composite material tailored for modern building envelope systems. Featuring a precision microporous structure, it effectively resists external liquid water infiltration while releasing trapped vapor from insulation layers, preventing moisture accumulation and insulation failure.

3-Layer PP/PE/PP Microporous Structure

This vapor permeable roofing membrane adopts a mature hot-press bonded SMS three-layer composite structure. Each layer carries separate functional roles to keep steady performance once laid on site.

The outer PP spunbond layer delivers great wear and puncture resistance. It handles short outdoor exposure and shields the inner functional core from damage during installation.

The middle PE microporous functional layer serves as the core component, achieving selective permeability to block liquid water and dew while letting internal water vapor pass out freely.

The inner PP spunbond layer improves how well the membrane fits insulation materials and lifts the overall tensile and tear strength of the finished roll.

Core Product Features

Engineered for practical building envelope moisture management, our waterproof breathable roofing membrane features verifiable and project-oriented performance:

Water-Resistant & Vapor-Permeable：

Balances reliable liquid water resistance and stable vapor permeability, solving common damp and mold problems of building insulation systems.

Stable Mechanical Performance：

Dual-layer PP non-woven fabric structure provides outstanding tensile, tear and puncture resistance, maintaining structural integrity during installation and long-term use.

Lightweight & Easy Installation：

Roll-type lightweight design simplifies roof and wall assembly procedures, reducing on-site construction difficulty and improving efficiency.

Controlled UV Stability：

Completed 6-month accelerated UV aging test per ASTM G154-06. Actual outdoor service life follows specific project design and local climate conditions.

Product Specifications & Test Data

We support full customization to meet various project and wholesale demands. All products comply with international ASTM testing standards, with complete test reports and batch inspection support for engineering verification.

Basic Procurement Specifications

Standard Performance Test Data

Engineering Applications

Our breathable membrane for metal roofs and tile roofs works widely across commercial and industrial building envelope projects. It has been deployed in large projects such as Zhanjiang BASF Project, Starbucks Industrial Park and Danzhou Sports Center.

When fitted over insulation on metal roofs, it reduces condensation and dripping, which fits steel-structure factories and logistics warehouses perfectly. For pitched tile roofs, it acts as a lightweight breathable protective layer within insulated roof assemblies and streamlines traditional roof construction. On curtain walls and exterior walls, it blocks rain ingress and releases trapped vapor, protecting insulation and reducing wall mold risk. It also suits light steel and prefabricated buildings to boost airtightness and cut heat loss for insulated exterior wall assemblies.

Why Choose Xiashi

As a reliable breathable roofing membrane supplier in China, we focus on stable quality and one-stop B2B supply services:

Customizable Factory Production：

Independent in-house SMS membrane production, supporting customized size, grammage, printing and packaging for diverse project and brand demands.

Complete Quality Documentation：

Provides official ASTM test reports and batch inspection certificates to support engineering review and project bidding.

Flexible B2B Supply：

Supports sample testing, small trial orders and large-bulk OEM wholesale, serving global distributors, contractors and project purchasers.

FAQ

Q1: What is a breathable roofing membrane?

A: It is a PP/PE/PP composite building material designed for building envelopes, which blocks external liquid water while allowing internal insulation vapor to escape, preventing insulation dampness and structural condensation issues.

Q2: Can it be used as the main roof waterproof layer?

A: No. It acts as an auxiliary vapor-permeable protective layer. The primary roof waterproofing function relies on metal panels or roof tile systems.

Q3: Where should a breathable roofing membrane be installed?

A: It is installed on the exterior side of the insulation layer in roof and wall assemblies, complying with professional building envelope design specifications.

Q4: Do you support customized specifications and OEM services?

A: Yes. We provide full customization for membrane size, grammage, color, logo printing and export packaging to meet personalized procurement needs.

Get Wholesale Quotation

Contact our professional sales team now to get customized quotations, official technical datasheets and reliable bulk supply solutions for your building projects.