Roof Underlay Is a Premium Tri-Laminate Synthetic Fire Retardant Absorbent Breathable Self-Supporting Roofing Underlay

• Customization: Available
• After-sales Service: Online Technical Support
• Certification: ASTM, CE, ISO, Bba
• Model NO.: C
• Material: PP PE
• Place of Origin: Jiangsu, China
• Application: Pitched Roof or House Wrap
• Roll Length: 50m/Roll or Customized
• Transport Package: Plastic Bags
• Specification: Customizable
• Trademark: Kingway
• Origin: China
• HS Code: 5603
• Production Capacity: 50000000meters

Product Description

Product Description

High-performance Breathable Membrane

The 150 g/m² underlayment is a versatile solution for modern roof construction. It is installed beneath the roof covering and reliably protects the structure from moisture, wind, and dirt particles. Its medium weight offers a balanced combination of stability and ease of installation—ideal for both new construction and renovation projects.

Properties of a roof underlay in practical use

This model is equally suitable for ventilated and non-ventilated roofs. The roof underlay membrane is characterized by its high tear resistance and remains dimensionally stable even during temperature fluctuations. Thanks to its UV resistance, the membrane can also be used exposed during a transitional period. Its low weight facilitates installation, while surface markings ensure precise cutting and overlapping. This makes work on the construction site faster and more efficient.

Durability and Functionality of a Roof Underlay

This membrane acts as a second water-bearing layer and supports the durability of the entire structure. The roof underlay prevents the penetration of rain and drifting snow while simultaneously allowing vapor to escape to the outside. This reduces the risk of moisture buildup and ensures a healthy indoor climate. Its robust yet flexible structure allows it to adapt to different roof shapes and can be easily installed even in complex geometries.

Specification

Why a waterproof underlay for roofs makes sense

With a surface weight of 150g/m², this membrane is strong enough to provide long-term moisture protection for roof structures. This waterproof roof underlay provides a stable protective shield for insulation materials and contributes to the building's energy efficiency. It can be used in both residential and commercial buildings. Thanks to its universal properties, it is an economical and reliable choice when it comes to securing modern roof systems.

Roof Membranes 150g

Weight per unit area: 150 g/m²
Sd value: 0.02 m – 0.05 m
Water resistance: W1
Temperature resistance: (-) 24 °C – (+) 70 °C
UV resistance: Maximum 3 month

Benefits of using roof membranes
 
Protection against moisture: They provide effective protection against
water penetration, protecting the building structure from damage.
Thermal insulation: When combined with suitable insulation materials, they help maintain a constant interior temperature in the building.
Durability and resistance: High-quality membranes are resistant to extreme weather conditions, UV radiation, and mechanical damage.
Energy savings: They contribute to reducing heat loss, which can lead to lower heating costs.

Black and White

Earthy yellow and white

Gray and white

Customized color & Brand logo printing

Technical Specifications

(Custom configurations available upon request.)

Weight	80gsm -200gsm (PP+PE+PP)
Roll size	1M ,1.5M ,3M* 50  m or coustomozed
vapor permeability	≥2250g/m²/24h
Sd value	0.02m(-0.005/+0.015)
Water tightness	Class W1
Tensile strength MD/CD	200/120N/50 mm(+1-20%)
Reaction to fire	Class E

Certifications

Packaging & Shipping

Company Profile

Nantong Kingway Complex Material Co., Ltd.

Nantong Kingway Complex Material CO., Ltd (Nantong Hekway Building Material CO., Ltd) is a leading professional manufacturer in China, which locates in Haian State-grade Development Zone, Nantong City, Jiangsu Province, nearby Shanghai. We have advanced production lines with the technology from Italy and Germany, which are applied to nonwoven products, film lamination, roofing materials, disposable medical products, packaging materials and so on. Main products: Nonwoven fabric , SMS, SMMS and manufactured products Film or foil laminated products Roofing membrane, flooring underlay PE woven fabric, PE tarpaulin, vapor barrier Greenhouse We not only have first-class processing line, but have first-grade quality management. We have been qualified by ISO9001 (quality) and CE, this system can supply active way to guarantee the quality. 

Why Choose Us?

Other Products

OEM/ODM capabilities
Competitive pricing & bulk discounts
Fast shipping & customs clearance support
Project solutions

Vapour barrier

Tape 

Insulation material

FAQ

Q: who are we?
A: We are based in Jiangsu, China, start from 2008,sell to Eastern Europe(18.00%),Southern Europe(15.00%),Northern
Europe(15.00%),Western Europe(12.00%),South Asia(6.00%),Eastern Asia(5.00%),Oceania(5.00%),Central America(5.00%),Southeast
Asia(5.00%),North America(3.00%),South America(3.00%),Africa(3.00%),Domestic Market(3.00%),Mid East(2.00%). There are total about
11-50 people in our office.

Q: how can we guarantee quality?
A: Always a pre-production sample before mass production;
Always final Inspection before shipment;

Q: what can you buy from us?
A: Breathable Membrane, Reflection Breathable Membrane, Housewrap, Vapor Barrier, Heat Insulation Film

Q: why should you buy from us not from other suppliers?
A: We not only have first-class processing line, but have first-grade quality management. We have been qualified by ISO9001 (quality)
and CE, this system can supply active way to guarantee the quality. We have exported to many countries, such as Canada, USA,

Q: what services can we provide?
A: Accepted Delivery Terms: FOB,CFR,CIF,EXW;
Accepted Payment Currency:USD,EUR,JPY,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,Credit Card,PayPal,Western Union,Cash;
Language Spoken:English,Chinese