What is Roof Sarking,House Wrap,Wall Wrap,Sisalation As Building Insulation with Australian standard

House wrap is also called wall wrap,roof sarking,vapour barrier,sisalation,it is made of Aluminum foil laminated woven fabric which is a composite building protective material. 

https://Woven Fabric Aluminum Foil Laminate - Hangzhou Vwin https://www.hzvcwfoil.com/Woven-Fabric-Aluminum-Foil-MPET-pl3907818.html 

It usually consists of the following three layers of structure:

Central layer: A layer of high-strength fiberglass or polymer woven mesh that provides excellent tensile strength and tear resistance.

Inner and outer layers: A highly reflective aluminum foil layer is laminated on both sides of the woven mesh using a laminating process.

This structure combines the two core functions of reflective insulation and waterproof breathability, making it play an important role in building envelope structures.

Color: One side Silver,the other side Blue,Green,Gray,Pink...any color

Size per roll: Standard width:1.35m,1.5m,max width:2.1m  Standard length:30m,60m.Max length:3000 m 

Duty: Light Duty,Middle duty,high duty,Extra high duty.

Type :solid,perforated

Certificate :AS/NZ 1530.2.....

Application:heat insulation materials,thermal insulation materials. 

1, As a roof lining (Roof Sarking)

The roof lining is a critical layer installed beneath roof tiles, metal sheets, or other roofing materials, and above roof trusses or rafters.

• Main functions:

Radiant Barrier: This is its core advantage. The aluminum foil layer can effectively reflect up to 97% of radiant heat. In summer, it reflects the huge heat generated by the sun shining on the roof back, greatly reducing the heat input into the roof space, thereby significantly reducing the top floor temperature and air conditioning energy consumption.

In winter, it can also reflect indoor heat back into the house, reducing heat loss.

Secondary Weather Barrier: forms a solid barrier to prevent moisture from seeping into the roof wood structure and insulation cotton due to strong winds driving rain or occasional damage to roof materials, protecting the building structure.

Dustproof and moisture-proof: prevent external dust and moisture from entering the room through roof gaps.

Enhance air tightness: Help seal the building shell and reduce unnecessary air leaks.

• VS Compared to traditional roof liners:

Traditional liners (such as asphalt paper or ordinary house wrapping materials): mainly provide waterproof and dustproof functions, with very limited thermal insulation performance.

Aluminum foil woven fabric: On the basis of providing equivalent waterproof and dustproof functions, it has added powerful reflective and thermal insulation functions, with outstanding energy-saving effects.

2, As a wall wrap /house wrap material

In the wall system, it is installed between external cladding (such as gypsum board) and external decorative materials (such as bricks, siding cladding).

• Main functions:

Weather resistant&Breathable Barrier: allows water vapor inside the wall to diffuse outward in the form of water vapor (breathability), preventing condensation and mold growth in the wall cavity. At the same time, it can effectively block liquid water from entering from the outside, protecting the wall structure from moisture damage.

Reflective insulation: Similarly, the aluminum foil layer on the wall can reflect external heat, reduce the heating effect of solar radiation on the wall, help maintain stable indoor temperature, and improve the overall energy efficiency of the building.

Air Barrier: Reducing the infiltration of air through wall gaps, improving the airtightness of buildings, thereby enhancing heating and cooling efficiency, and improving comfort.

• Compared with traditional house wrapping materials:

Traditional House Wrap (such as Tyvek, etc.): focuses on waterproof, breathable, and windproof functions, but has little thermal insulation performance.

Aluminum foil woven fabric: While achieving excellent waterproof and breathable performance, it also provides an additional insulation layer, resulting in stronger overall performance.

Summary of Core Advantages

• Excellent thermal insulation performance: The unique reflective insulation principle directly responds to radiant heat, with significant energy-saving effects, especially suitable for hot or cold climates.

• Comprehensive protection: integrating waterproof, moisture-proof, dustproof, and breathable functions, providing 360 degree protection for building structures.

Durable and sturdy: The central woven mesh structure endows it with extremely high mechanical strength, making it less likely to be torn or punctured during construction and durable.

• Improve comfort: By stabilizing indoor temperature and improving air tightness, create a more comfortable and less drafty living environment.

Precautions

Installation requirements: An air gap (usually about 20mm) must be left during installation. The reflective function of aluminum foil relies on an air layer to maximize its effectiveness, and direct contact with other materials will significantly reduce its reflective efficiency.

Conductivity: Aluminum foil has conductivity, and special attention should be paid to maintaining a safe distance from wires, electrical boxes, etc. during installation, and following local electrical safety regulations.

Cost: It is usually more expensive than traditional single function liners or wrapping materials, but the long-term energy-saving benefits and protective value it brings can offset the initial investment.

Conclusion:

Aluminum foil woven fabric is a high-performance and multifunctional building enclosure material. It surpasses traditional single function waterproof pads or breathable wrapping materials by combining reflective insulation with waterproof and breathable, providing a higher level of protection and energy efficiency improvement for roof and wall systems. It is one of the ideal choices for modern energy-efficient buildings and high-quality residential construction.