• Envirograf VWB Moisture and Smoke Cavity Barrier

Envirograf VWB Moisture and Smoke Cavity Barrier

Product 55 - VWB

We no longer stock this product.



VWB Moisture and Smoke Cavity Barriers designed with grommets and tubes for moisture and water release, allowing ventilation up the cavity but sealing against smoke.

  • 1m and 2m lengths available
  • Indicate required tube length before ordering
  • Sits between brick and mortar
  • Width options available
  • Refer to sizes below


1 metre or 2 metre lengths

Ref Gap Width
VWB75/G 75mm
VWB120/G 120mm
VWB150/G 150mm
VWB200/G 200mm
VWB250/G 250mm

Available in different widths to fit most cavity spaces, the barrier is made in 2 lengths; 1m is supplied with 3 grommets and the 2m with 5. Please enquire with our sales team before checkout regarding the length of tube required, on 0113 245 5450.

The Envirograf VWB Moisture and Smoke Cavity Barrier has integrated rubber grommets and tubes for releasing moisture and water from a cavity whilst maintaining ventilation. The barrier is coated with intumescent material that expands in fire, sealing gaps to stop the spread of flames.

The barrier sits between brick and mortar, with the tubes and grommets placed through the course.

Envirograf Fire Cavity Barriers should be fitted by experienced professionals to ensure they are installed correctly. Products can only be guaranteed by Envirograf if fitted correctly and incorrect installations will be condemned if inspected. Check labels, fixing brackets, manufacturer installation instructions, etc. Should a site visit be required to check installation, this can be arranged upon request but will be chargeable.

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and ConditionsWe will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.

Any Envirograf products to be used in or for Harrods department store should be authorised with our Technical Team prior to purchase.

Product Details
Product 55 - VWB

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

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