• Envirograf CV Strip Cavity Barrier Range
  • Envirograf CV Strip Cavity Barrier Range
  • Envirograf CV Strip Cavity Barrier Range
  • Envirograf CV Strip Cavity Barrier Range

Envirograf CV Strip Cavity Barrier

Product 55 - CV

We no longer stock this product.

VAT excluded

£0.00 Tax incl.


This CV Strip Cavity Barrier is a thin and flexible 5mm PVC strip, self-adhesive and foil-clad with intumescent that expands in fire to form a seal in cavities 25-120mm. Ideal for use around door & window frames, behind PVC windows, timber-framed houses, etc.

  • Check sizes below
  • For timber & masonry cavities
  • Very easy to fix
  • Self-supporting
  • Use on curves & profiles
  • Easily cut to any length


Ref Width Thickness Gap Size Protection Lengths Available Extras
CV30/4 30mm 4mm 30/45mm 1m, 2m, 3m
CV30/6 30mm 6mm 50/60mm 1m, 2m, 3m
CV30/8 30mm 8mm 60/70mm 1m, 2m, 3m
CV30/10 30mm 10mm 80/90mm 1m, 2m Supplied with brackets
CV30/15 30mm 15mm 100/120mm 1m, 2m Supplied with brackets
CV75/4 30mm 4mm 30/50mm 1m, 2m
CV75/10 75mm 10mm 80/100mm 1m, 2m Supplied with brackets

A quick and easy fireproofing cavity barrier for buildings using cladding such as steel-framed modular constructions, pre-fabricated units, and timber-framed houses clad with external brick, block, wood and tiled cladding. Use the Envirograf CV Strip Cavity Barrier with both timber and masonry cavities, protecting cavities from 25mm to 120mm wide.

Self-supporting, the Strip Cavity Barrier expands in fire to form a seal against the external wall for up to 120 minutes, stopping the spread of fire and smoke up a cavity to other parts of a building. This helps prevent further damage from a fire, as well as giving extra time for evacuation. Use around door and window frames, and behind PVC windows for an effective fire-stopping seal.

This flexible cavity barrier strip can be used on curved and profiled surfaces, with a self-adhesive backing for easy fixing. More permanent fixing can then be applied, such as staples and nails. For larger cavities, the Strip Cavity Barrier is supplied with brackets for fixing.

The nature of the cavity barrier ensures airflow around cavities in a building whilst maintaining fire and smoke protection.

More sizes and colours (black, red, white) can be made to order - contact our sales team on 0113 245 5450 for more information.


Peel off paper from double-sided tape. This tape has been developed to ensure good adhesion to most products. The strip can then be permanently fixed with staples, large head nails or screws; fixings approximately 300mm apart.

CV strip for cavities up to 70mm does not require any brackets as the expanding intumescent is self-supporting in the event of a fire. For larger cavity gaps CV30/10 or CV30/15 is supplied with brackets for extra support.

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 - CV

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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