SIDERISE RV | Cavity Barriers for Cladding / Rainscreen – Vertical – Know-how

FAQs

Can I use your RH open-state cavity barrier in a vertical application?

Open-state cavity barriers are provided as a means of maintaining drainage and ventilation in a façade cavity and as such aren’t usually required for a vertical application. The Siderise RH has therefore been specifically designed and tested for horizontal applications.

For vertical applications within a drained and ventilated cavity, the Siderise RV 'closed-state' cavity barrier would be the suggested product. Please see the RH & RV product pages for more information.

If you have a specific application where you feel the RV barrier may not be suitable, our Technical Services Team would be happy to review a Project Specific Detail and offer feedback.

Typically we would require:

  • Relevant drawings as pdfs
  • Required fire resistances

Drawings should be dimensioned and identify (label) all materials as well as show the proposed locations for cavity barriers. Please submit your enquiry via our contact page.

Can rainwater pipes penetrate the RH and RV cavity barriers?

Whilst we would advise that service penetrations through cavity barriers are avoided wherever possible, there are means by which rainwater pipes (RWP) may be accommodated by the Siderise RH cavity barriers.

Our Technical Services Team would be happy to review a Project Specific Detail and evaluate whether a solutions can be offered.

Typically we would require:

• Relevant drawings as pdfs
• Required fire resistances

Drawings should be dimensioned and identify (label) all materials as well as show the proposed location for the cavity barrier and RWP.

Please submit your enquiry via our contact page.

Where do I access Test certifications?

SIDERISE are strong advocates of large-scale system testing and have participated in a significant number of such tests (including BS 8414, NFPA 285). This has provided considerable data which is invaluable in determining the performance of our cavity barriers.

Please see the systems test page for further information.


As the market leader in passive fire protection products, Siderise are also able to offer a wide range of Third Party Certified products.

These Third Party Certificates provide details of product testing and performance.

Siderise CW range - Perimeter barriers and fire stops for curtain walling 
Siderise RH - Cavity barriers for Ventilated Cladding/Rainscreen - Horizontal
Siderise RV - Cavity barriers for Ventilated Cladding/Rainscreen - Vertical
Siderise EW - Cavity barriers & fire stops for masonry external walls
Siderise LGS - Linear Gap Seal
Siderise RF - Cavity barriers and firestops for raised access floors 

Test Certificates for the RH and RV range are available from the product page.

What are National Classes (BS) and European Classes (EN) for reaction to fire and fire resistance?

Reaction to fire

National Class: Historically products were tested to BS 476-6 and 7 and then classified as Class 0, Class 1 etc dependant on their performance.

Reaction to fire national classes have now been removed from Approved Document B for England & Wales (2019 edition).

European Class: Products should now be classified to European Class A1, A2 etc. under EN 13501-1.

Resistance to fire

National Class: BS 476-20 is a furnace test to prove fire resistance performance in terms of integrity (E) and insulation (I) in minutes.

For example, a product may achieve 120 minutes integrity and 90 minutes insulation.

European Class: Products should be tested to the relevant EN standard such as EN 1364-4 or EN 1366-4. The fire resistance in terms of integrity and insulation is then classified to EN 13501-2.

For example, a product may achieve 120 minutes integrity (E 120) and 90 minutes insulation (I 90), this would receive a classification of EI 90.

Approved Document B for England & Wales (2019 edition) now lists classification to EN 13501-2 as the primary route to compliance. BS 476-20 is listed as an alternate route to compliance.

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