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Siderise CH | Cavity Barriers for Non-ventilated Cladding – Horizontal – Technical Data

Version: 1.11 - Release Date: October 2021

Application

Siderise CH horizontal cavity barriers for non-ventilated cladding facades are used to full fill the void between the external envelope and internal structure. They are installed in combination with RV vertical cavity barriers as part of a system.

The construction of CH horizontal cavity barriers offers excellent resistance to the passage of both smoke and fire. Additionally, by fully sealing the void, they assist ventilated façades to function by maintaining air pressurisation compartmentation.

Importantly, their unique stonewool lamella core construction enables the vertical barriers to accommodate the serviceability movement normally associated with rainscreen façades.

Intersections between horizontal and vertical cavity barriers are simply abutted. The leading-edge compresses directly against the external envelope. No intumescent strip is required.

Product Description

Siderise CH horizontal cavity barriers are installed within the cavity formed between the cladding facade and the inner structural wall using appropriate Siderise support brackets. Brackets are available in either galvanised mild steel (G) or stainless steel (S).

Siderise CH horizontal cavity barriers for rainscreen cladding applications consist of a non-combustible stonewool lamella core, with reinforced aluminium foil faces, giving an overall reaction to fire performance of Class ’A1’ to EN 13501-1.

Standard sheet sizes are 1200mm x 1100mm.

Fire Performance

Product Fire Performance

Siderise CH horizontal cavity barriers have been tested in accordance with EN 1366-4: 2006+A1: 2010. The cavity barriers maintained integrity (E) and insulation (I) requirements for up to 2 hours and are classified up to EI 120 to EN 13501-2 as detailed in Table 1.

The tests have been undertaken to assess the ability of the cavity barriers to reinstate the fire resistance of a lightweight aerated concrete supporting construction. This is the standard assembly for testing such cavity barrier products as it allows the performance of the individual barrier to be classified.

System Fire Performance

Siderise cavity barrier products have been used in a growing number of large-scale system tests such as BS 8414 (1&2) and NFPA 285. These may be used to evaluate the performance of the Siderise cavity barriers within a complete cladding system. The rules for the evaluation of results from BS 8414 are subsequently defined in BS 9414. 

In all cases, we recommend that the specifier and user review the specific project configuration regarding available large-scale system test data and the latest National Building Regulations, local Building Code and/or government advice.

For information regarding performance and assembly details in system tests please contact the technical team.


Table 1: Fire Resistance to EN 1366-4

Void
Width
(mm) 		Product
Ref. 		Product
Thickness 		Compression
(minimum) 		Cover
Length
(mm) 		Bracket
Requirement 		Classification
(EN 13501-2) 
20 to 50 CH-120/120 120mm +5mm 1200 None EI 120 
 CH-60/60 90mm       EI 60 
51 to 150 CH-120/120 120mm +10mm 1200 2no. B65/110 EI 120 
 CH-60/60 90mm       EI 60 
151 to 250 CH-120/120 120mm +10mm 1200 2no. B195 EI 120 
 CH-60/60 90mm       EI 60 
251 to 300 CH-120/120 120mm +10mm 1200 2no. B355 EI 120 
 CH-60/60 90mm       EI 60 

Please note:

  • Support brackets should be installed at 600mm fixing centres (300mm from each end).
  • The brackets are supplied as standard in 1mm galvanised mild steel (G) or stainless steel (S), in a flat form for site folding. They incorporate pre-notched indents to aid this process.
  • Lengths of the barrier are secured with these dedicated brackets, which impale the product at mid thickness to a depth of 75% of void.
  • The brackets are drilled on-site and secured to the inner structural wall using non-combustible steel anchors or screws. These fixings are not supplied by Siderise.
  • Please see separate installation instructions available on our website.


 

Thermal Performance

Thermal conductivity: λ10= 0.038 W/m.K (tested foil to foil)

Technical Specification

Table 2: Siderise CH cavity barriers

Property Value 
Form Supplied Sheets : 1200mm x 1200mm (UK and EU); 1200mm x 1100mm (RoW): Thickness is denoted by the rating
Pre-cut strips : 1200mm x (cavity + compression) x thickness, please see Tables 1 
Colour No colour. Stonewool exposed to leading edge 
Finish Aluminium foil to surfaces exposed to cavity 
Density Nominal 75 kg/m3 
Thermal Conductivty λ10= 0.038 W/m.K (tested foil to foil) 
Void Sizes 20mm to 300mm - please see table 1 
Reaction to Fire Classified A1 to EN 13501-1 
Resistance to Fire Classified up to EI 120 to EN 13501-2 - please see table 1
CH-120/120 cavity barriers are manufactured from CW-FS120
CH-60/60 cavity barriers are manufactured from CW-FS60
CW-FS is certified under Certifire CF 563 and Intertek WHI19-32944301. 


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Environmental

Siderise CH horizontal cavity barriers are environmentally friendly:

  • They contain no Volatile Organic Compounds (VOCs) and no very Volatile Organic Compounds (vVOCs).
  • Zero Ozone Depleting Potential
  • Zero Global Warming Potential
  • Recyclable



Additional Information

The following information is available upon request or via download from the website:

  • Standard Details
  • Safety Data Sheet 
  • Installation Instructions

Technical Support

Technical Services Team: technical.services@siderise.com

Site Services Support

Siderise offers a range of services to contractors and installers. These include toolbox product installation and site installation inspection and reporting (subject to availability and by agreement).

Site Services Team: site.services@siderise.com


Context

The information in this datasheet is believed to be accurate at the date of publication. Siderise has a policy of continuous product improvement and reserves the right to alter or amend the specifications of products without prior notice. Siderise does not accept responsibility for the consequences of using the products described outside of the recommendations within this datasheet. Expert advice should be sought where there is any doubt about the correct specification or installation of Siderise products.

 
 
Published Version: CH_v1_11_20211117_1731