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Fireproof Rainscreen Cavity Barrier (RSM)

Product 55


[ RSM ]

Rainscreen cavity barriers with washer or bracket fixings for facade cladding systems.

Not available to purchase online.

We need to ask you a few more questions and ensure this is the suitable product for your needs.

To order please call us on +44 (0) 1 304 842 555

£0.00 ex. Vat



Fireproof Rainscreen Cavity Barrier

Fireproof rainscreen cavity barrier range, especially designed to offer excellent passive fire protection for rainscreen and other types of cladding. Using fireproof sponge instead of mineral wool, this range offers many advatanges:

  • The barrier is much thinner, additionally offering a better fire rating.
  • Easy to fix and no masks required.
  • Fixing brackets already in place, fix with screws, nails, or spit nails.

Made in 1-metre lengths, with 4 fitting brackets for horizontal application or 3 brackets for vertical. Cut with a sharp knife to fit around metalwork. The cover is made from a strong, intumescent-coated material, completely water-resistant.

The RSM range is the same as the RSF, however, the RSF comes with a foiled reinforced covering which is water-resistant.

Depending on the required fire rating, the barrier can have different thickness. Specify the overall cavity size and required ventilation gap when ordering.

Cavity Barriers are pieces of fire-stopping material. They fit within the cavity of a building at each floor horizontally and party wall in a verticle position. The material provides compartmentation. Both the flames and heat cannot be transferred to other compartmental areas. Throughout the life of the building, the Cavity Barrier will remain fixed in place. In the event of a fire, the intumescent material expands and seals off the gaps. Additionally, the horizontal barriers allow for a ventilation gap within the cavity. Subsequently closing when the intumescent expands.

Our Cavity Barrier range at Envirograf® offers superb protection to your building by providing fire stopping. Explore the Cavity Barrier range online.


– Barriers have a slim profile without compromising fire rating – will still protect for up to 2 hours
– Non-fibrous, dust-free and easy to install with washers or brackets
– The entire RS range can be fitted vertically or horizontally
– Tested to BS EN 1363-1 (1999), achieving up to 132 minutes protection.
– Tested to BS476 Part 20, achieving up to 66 minutes protection.

Case Studies

  • RSM cavity barriers in a prestigious London project

    RSM cavity barrier used at Eagle House, 161 City Road, London

  • Living the High Life on Finchley Road

    Rainscreen cavity barriers used to protect concealed cavities between cladding.


Order References / Sizes

RSM RANGE                  30/60 minutes / Thickness   40mm                 120 minutes / Thickness 50mm

RSM Non-ventilated                                     1 metre long
Ref                                  Width
RSM150                          150mm
RSM180                          180mm
RSM200                          200mm
RSM250                          250mm
RSM300                          300mm

RSM/I with intumescent                             1 metre long
Ref                                    Width
RSM/I/150                       150mm
RSM/I/180                       180mm
RSM/I/200                       200mm
RSM/I/250                       250mm
RSM/I/300                       300mm

RSM/A with ventilation holes                   1 metre long
Ref                                     Width
RSM/A/150                      150mm
RSM/A/180                      180mm
RSM/A/200                      200mm
RSM/A/250                      250mm
RSM/A/300                      300mm