Airtight/Breathable Waterproofing Membrane Customizable Structure PP PE Synthetic Roof Underlayment

• Customization: Available
• Certification: CE, ISO
• Thickness: 0.3mm-0.6mm
• Model NO.: C
• Type: Waterproof Menbrane
• Material: PP+PE
• Packing: Transparent Bag or Heat Shrink Film
• Transport Package: HDPE Trasparent Bag
• Specification: 1.5*50
• Trademark: KIGNWAY
• Origin: China
• Production Capacity: 40 Containers

Product Description

Ddescription

KINGWAY  is a low vapour resistant, air permeable and highly watertight breather membrane designed to be fixed beneath tiles and slates as a pitched roof underlay creating a secondary barrier to rain, wind and snow. KINGWAY eliminates the need for a vapour control layer or ventilation hardware fitted to the roof.

KINGWAY's unique and patented meltblown core enables high levels of airflow and transport of moisture vapour from the roof space, making the formation of condensation virtually impossible and therefore eliminating the occurrence of interstitial condensation in pitched roofs.

Features and Benefits

UV & Water Resistant
Low Vapour Resistance
Air Permeable
Hydrophobically treated
No vapour control layer required
Eliminates low- & high-level ventilation

Procduct	Breathable roofing membrane
Weight	70g-220g
Width	1.5m; 3.2m or customized
Length	50m or customized
Colour	customized
Resistance to water penetration	W1
SD	0.02

Packing & Delivery

Company Name

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. We have exported to many countries, such as Canada, USA, Chile, Argentina, New Zealand, Australia, Malaysia, Japan, Ukraine, Latvia, Slovenia, Slovakia, Spain, CZ, Russia, Croatia, Bulgaria, Romania, Italy, UK, Germany, Greece and so on. With a group of excellent senior management and hi-tech R& D personnel and our skilled workers, we can supply you the goods with competitive prices and better quality. We look forward to establish friendly and long term relationship with you in the near future.

FAQS

1. What is the difference between breathable and non-breathable roofing felt?
Non-breathable felt acts as a complete barrier and requires ventilation below to prevent condensation. Breathable membranes contain a microporous film that allows moisture vapour to escape while still repelling water.

2. Do I still need ventilation when using a breathable membrane?
Breathable membranes greatly reduce condensation risk, but most roofs still require some ventilation at the eaves and ridge to meet building regulations and manage residual moisture.

3. How long will a breathable membrane last?
When properly installed and protected by the roof covering, breathable membranes can last for several decades. Their lifespan may be reduced by prolonged UV exposure, incorrect fixing or mechanical damage, so always follow the manufacturer's instructions.

4. What weight of membrane should I choose?
Lightweight membranes (100–120 gsm) suit sheltered domestic roofs, mid-weight options (130–160 gsm) are ideal for standard homes and extensions, and heavy-duty membranes (160 gsm+) are best for exposed or commercial settings.

5. Which way up do I lay a breathable membrane?
Most membranes have a printed or darker side that should face upwards during installation. This side offers better UV resistance. However, since most are vapour-open on both sides, performance is not significantly affected if installed the other way up.