SFS non-woven PP breathable membrane for roof underlayment T150

A three-layer highly breathable, fully waterproof membrane, constructed from high tensile spunbonded polypropylene layers, combined with a microporous polypropylene film.
The outer layer forms the functional waterproof surface; the middle layer is the breathable waterproof membrane, and the inner layer protects the membrane from abrasion and damage, also giving additional strength. Such a structure enables the fabric to allow moisture vapour to pass through, whilst remaining fully waterproof. We can provide various colors on the upper surface, printed with the customer's logo and headrest lines.

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Product Details

Material	Nonwoven Fabric and PE Film
SD Value	0.02±0.015
Weight Per Unit Area	Approx. 150g/m²
Dimensions	1.5 X 50 m （Or Custom）
Construct	3 layer
Water Penetration Resistance	W1
Tensile strength	MD280±40N/50mm
Tensile strength	CD200±40N/50mm
Elongation	MD80±80N/50mm
Elongation	CD95±65N/50mm
UV Resistance	3 Months
Color	Custom

SFS Non-Woven PP Breathable Membrane for Roof Underlayment T150: High-Strength Roofing Protection

This product is a high-strength, breathable roofing underlayment membrane designed for commercial and industrial building applications.

Material and Construction

Constructed from a spun-bond non-woven polypropylene (PP) fabric, laminated with a breathable membrane. This SFS (Spunbond Film Spunbond) construction provides a balance of tensile strength and water resistance.

Performance Benefits

Water Resistance: Acts as a temporary barrier against water ingress during construction and a secondary weather barrier after completion.
Breathability (Vapor Permeable): Allows water vapor to escape from the roof structure, reducing the risk of condensation and timber rot.
High Tensile Strength: The SFS non-woven PP structure offers high resistance to tearing and puncturing during installation and under load.
UV Resistance: Formulated to withstand exposure to sunlight for a defined period (e.g., 3 months) as required by construction timelines.
Durability: Resistant to decay, mold, and chemical degradation commonly found in roofing environments.

Primary Applications

This roof underlayment membrane is specified for use in:

Commercial flat and pitched roof systems
Industrial metal deck roofing
Renovation and re-roofing projects
Concrete and timber roof substrates

Frequently Asked Questions (FAQ)

What is the primary function of a breathable roof underlayment?

The primary function is to provide a secondary weather protective barrier against water ingress while allowing moisture vapor from within the building structure to diffuse outward, thereby mitigating condensation.

Is this membrane suitable for use in cold climate applications?

Yes. The polypropylene material retains its flexibility and performance characteristics at low temperatures, making it suitable for cold climate roofing projects.

What is the typical installation method for this underlayment?

It is typically installed horizontally across the roof rafters or decking, starting from the eaves. It is fastened mechanically or using adhesive tapes compatible with PP membranes, with overlaps as per manufacturer's installation guidelines.

Industry Applications