Vapour Barrier

Short Description:

Vapour Barrier is laid on the base layer to strengthen the water tightness of the envelope structure and prevent the indoor water vapor from penetrating into the insulation layer.

The use of Vapour Barrier and waterproof breathable film above the thermal insulation layer can make the wall or roof obtain excellent water vapor isolation effect, and make the water vapor in the envelope smooth discharge through the waterproof breathable film, protect the thermal performance of the envelope structure, so as to achieve the purpose of energy saving.


  • Small sample: Free
  • Customer design: Welcome
  • Minimum order: 1 pallet
  • Port: Ningbo or Shanghai
  • Payment term: Deposit 30% in advance, balance 70% T/T after shipment against copy of documents or L/C
  • Delivery time: 10~25days after receiving deposit payment
  • Product Detail

    Product Tags

    ◆Specification

    Vapor barriers are specialized materials that serve a vital role in controlling the flow of moisture vapor. They are strategically placed in various areas of a building, such as walls, floors, attics, and ceilings, with the primary objective of impeding the movement of water vapor from one side to the other.

    To gain a better understanding of vapor barriers, let’s delve into the fascinating science of moisture diffusion. Moisture naturally travels from regions with high humidity to those with lower humidity, and this flow can happen in either direction. Within a building, moisture typically migrates from the warm and humid interior to the cooler and drier exterior in colder months. Conversely, during warmer months, it moves in the opposite direction.

    Vapor barriers play a crucial role in protecting your home by creating a strong barrier that effectively resists the passage of moisture-laden air. Their primary function is to limit the movement of water vapor, which helps prevent excessive moisture from infiltrating the building envelope. This important protective measure shields your home from potential damage caused by moisture, including issues like rotting wood, structural deterioration, and the growth of mold and mildew.

    ◆Package

    Each roll with plastic bag, or according to customer’s needs.

    ◆Usages

    Vapour Barrier is laid on the base layer to strengthen the water tightness of the envelope structure and prevent the indoor water vapor from penetrating into the insulation layer.

    The use of Vapour Barrier and waterproof breathable film above the thermal insulation layer can make the wall or roof obtain excellent water vapor isolation effect, and make the water vapor in the envelope smooth discharge through the waterproof breathable film, protect the thermal performance of the envelope structure, so as to achieve the purpose of energy saving.


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