Kingspan Nilvent Breather Felt Vapour Control Layer | 50m x 1.5m Roll

KingspanSKU: BM00180
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Sale price£119.84 

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Delivery within 3 - 5 working days

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Over £499.95 Ex-Vat

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Kingspan Nilvent is an innovative breathable membrane engineered for optimal performance in unventilated pitched roof and timber frame wall applications.

This advanced solution offers a comprehensive blend of waterproofing, airtightness, and vapour permeability, ensuring your construction project benefits from the highest standards of protection and efficiency.

Features and Benefits:

  • Waterproof: Kingspan Nilvent serves as an effective temporary roof covering, safeguarding the structure from water ingress during construction phases.
  • Lightweight Design: Its non-tenting, lightweight construction facilitates easy handling and installation, streamlining the construction process.
  • Airtight Efficiency: Achieves airtightness at standard building pressures, enhancing the energy efficiency of the structure.
  • High Vapour Permeability: Excellent water vapour permeability ensures a healthy, moisture-controlled environment within the building.
  • Durability: With exceptional nail tear and tensile strengths, along with resistance to heat and UV radiation, Nilvent is built to last.
  • Reduced Noise: Remains quiet even under wind loading, contributing to a more peaceful interior environment.
  • UV and Mechanical Protection: A robust, laminated 3-layer polyolefin construction provides comprehensive protection against UV rays and mechanical damage.


Kingspan Nilvent is specifically designed for use as a breathable membrane in unventilated pitched roofs and timber frame walls, offering unparalleled protection and performance.

Technical Information

  • Composition: nilvent comprises a laminated, 3–layer polyolefin construction. The top layer provides protection from UV and mechanical damage. The middle layer is the functional layer. The bottom layer provides abrasion resistance. Kingspan nilvent has a light grey upper surface, printed with the Kingspan nilvent logo, and a dark grey lower surface.
  • Roll Width: 1.5m
  • Roll Length: 50m
  • Thicknesses: 0.4 mm
  • Area per Roll: 75 m2
  • Water Vapour Resistance: nilvent achieves a resistance of 0.10 MNs/g and a water vapour trasmission Sd of 0.02 m.
  • Reaction to Fire (Eurocalss): nilvent has a Euroclass rating of E.
  • Liquid Water Penetration Resistance: nilvent is classified as W1, when tested, unaged, in accordance with BS EN 1928: 2000. W1 is the best possible classification. 
  • Tensile Strength: nilvent achieves an unaged tensile strength of 265 N / 50 mm in the longitudinal direction, and 210 N / 50 mm in the transverse direction.
  • Nail Tear Strength: nilvent achieves a nail tear strength of 130 N in the longitudinal direction, and 145 N in the transverse direction.

Installation Guidance:

To accommodate varying roof pitches and wall configurations, Nilvent offers tailored installation laps, ensuring optimal performance and compatibility with slating, tiling, and rooflight installations. Its versatile application allows for horizontal or vertical fixing to timber frame walls, seamlessly integrating into any construction project.

Rafter pitch:

  • 12.5° – 14°:  150mm minimum lap.
  • 15° – 34°: 100mm minimum lap.
  • 35° or above: 75mm minimum lap.

Timber frame walls: Kingspan Nilvent can be fixed to a timber frame wall either horizontally or vertically.

Slating & tiling: Slating and tiling over Kingspan Nilvent is exactly the same as on any other pitched roof except that, in some instances, the slate / tile battens (if required) are fixed to the previously applied counter–battens.

Rooflights: please refer to the instructions provided by the rooflight manufacturer. In the absence of manufacturer’s

Choose Kingspan Nilvent for your next construction venture to benefit from its unmatched protection, durability, and efficiency, safeguarding your buildings against the elements while enhancing their structural integrity and energy performance.


Kingspan Nilvent Breather Felt Vapour Control Layer Brochure

Order Value Delivery Charge
Up to £200.00 ex-vat £75.00 ex-vat
£200.00 - £499.95 ex-vat £55.00 ex-vat
Above £499.95 ex-vat Free Delivery


 Jablite Products Delivery Charge
Order Value Delivery Charge
£80.00 - £500.00 ex vat £59.95
Above £500+ ex vat Free Delivery


Weekend Delivery
Available upon request


Parcel Rates
Delivery charge may vary depending on quantity and volume of your order.
Pricing will be calculated during checkout.


Local Delivery Charge
Within 35 miles of Postcode S63 9BL - Up to £500.00 ex-vat
Delivery Charge £35.00 ex-vat
Please contact us to arrange collections
Tel: 03300 55 32 02 | Email:


  • Delivery charges will automatically be calculated within the checkout process.
  • Orders are only processed for delivery between 8.30am - 5.00pm Monday to Friday excluding bank holidays.
  • Moffett offload will be used for large bulky deliveries and only when agreed with you.
  • Please advise of any access issues on ordering.
  • Delivery is Kerbside only.
  • In the unlikely event that your delivery is not correct or damaged please notify us immediately and mark any issues on the delivery slip.


    Where We Deliver

    Delivery Areas

    We have a fleet of FORS delivery vehicles all with Moffett mechanical off loads that deliver nationwide. Sometimes we may use 3rd party carriers for smaller orders.


      Product Delivery Times

      • The vast majority of our orders are dispatched within 3 working days, this can however be up to 5 working days, please contact us if you require something urgent.
      • Speciality items may take up to 5-7 working days.
      • We will contact you with in 24/48hrs of your order been placed to confirm delivery times and dates.

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