Verified by manufacturer 19 days ago
RH25-90/30
IFCC
Certificate type
QA Certificate
Certificate type
EPD
Certificate type
Siderise RH Cavity Barriers for horizontal application cladding/ rainscreen systems, ensure the system drains freely, while maintaining airflow and providing an effective hot smoke and fire seal.
Application
Siderise RH ‘Open State’ horizontal cavity barriers have been specifically developed to meet the requirements for cavity barriers used in drained and ventilated façades. Their use ensures that the system will drain any moisture within the façade construction whilst maintaining airflow and, in the event of fire, provide an effective hot smoke and fire seal.
Siderise has developed two ‘Open State’ (open void) horizontal solutions: RH25 for air gaps up to 25mm and RH50 for air gaps up to 50mm.
The product range is compliant with current market requirements and has been tested to ASFP Guidance: ’Open State’ Cavity Barrier used in External Envelope or Fabric of Buildings, utilising principles of EN 1363-1. ASFP Technical Guidance Document –TGD 19 (July 2014 revised Nov 2017) refers.
Third Party Certification
Siderise was the first manufacturer to achieve Third-Party Certification for Rainscreen Cavity Barriers.
For current details of Siderise certified 'Open State' Cavity Barriers, including the testing and scope of our Third-Party Certification, please refer to IFC Certification IFCC 1712.
This Certificate is available from our online Technical Resources or by contacting our Technical Support department: technical.services@siderise.com.
Siderise RH ‘Open State’ horizontal Cavity Barriers consist of a non-combustible stonewool lamella core, with reinforced aluminium foil faces. This primary seal has a reaction to fire performance to Class 'A1'. The exposed leading edge is also sealed with aluminium foil. Whilst the base material is water repellent and non-hygroscopic, this predominantly enclosed arrangement affords an added degree of weather protection to the core material.
Siderise RH ‘Open State’ horizontal cavity barriers incorporate a continuous high performance reactive intumescent strip which is bonded to the leading edge. The intumescent material has a reaction to fire performance to Class 'E'. In the event of exposure to fire, the intumescent rapidly expands and fully seals the purposely designed ventilation gap formed at the time of installation, between the barrier and the rear of the cladding.
As standard, the range includes a choice of products to suit either 25mm air gaps - referred to as RH25 - or 50mm air gaps - referred to as RH50. Both options are available with either galvanised mild steel (G) or stainless steel (S) fixing brackets as part of the system.
The specific horizontal cavity barrier system is then referred to as either RH25G, RH25S, RH50G or RH50S accordingly. The choice of brackets is usually determined by the rainscreen system designer according to project exposure and/or location.
The leading edge of the horizontal cavity barriers is encapsulated in a weather-resistant polymer film. As standard, the film is black to register as a ‘shadow-line’ behind open joints in the cladding.
For product identification purposes, the top edges of the film used on the RH25 and RH50 cavity barriers are colour-coded and labelled to show the product fire performance rating.
Features and benefits:
Fire Performance
Siderise ’Open State’ horizontal cavity barriers have been tested in accordance with ASFP TGD19 (prEN 1364-6): ’Open State’ Cavity Barrier used in External Envelope or Fabric of Buildings. This test method specifies a procedure for determining the fire resistance of ’open state’ cavity barriers when subjected to the standard fire exposure conditions and performance criteria stipulated in EN 1363 Part 1: 2012.
The tests have been undertaken to assess the ability of the horizontal ’open state’ cavity barrier products to reinstate the fire resistance of a pre-cast, 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.
We advise that all ‘RH’ Open State Cavity Barriers are positioned either flush or projecting in front of the thermal insulation.
Product Fire Performance
Siderise RH25 ’Open State’ horizontal cavity barrier for maximum 25mm air gaps
Siderise have tested horizontal cavity barriers with a 25mm air gap to the ASFP TGD19 method. During the fire tests, the seals achieved full effective closure in under 5 minutes. Seal temperatures remained below a 180°C rise during this activation period and maintained the EI requirements for up to E 120 and I 90. See manufacturers Technical Data Sheet for details.
Siderise RH50 ’Open State’ horizontal cavity barrier for maximum 50mm air gaps
Siderise have tested horizontal cavity barriers with a 50mm air gap to the ASFP TGD19 method. During the fire tests, the seals achieved full effective closure in under 5 minutes. Seal temperatures remained below a 180°C rise during this activation period and maintained the EI requirements as detailed in Table 1 for up to E 60 and I 60. See manufacturers Technical Data Sheet for details.
System Fire Performance
Siderise cavity barrier products have been used in a 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.
For information regarding performance and assembly details in system tests please see our website
Please read the below in conjunction with the manufacturers Technical Data Sheet.
Brackets
Screw fixings:
Color | Manufacturer guidancePlease see 'Identifying strip colour' |
Finish | Foil Guidance for specification option: Aluminium foil tape to top and bottom surfaces. |
Material | Stonewool Aluminium Guidance for specification option: Foil. Intumescent Stone wool Rock fibre mineral wool |
Shape | Rectangle Other |
Length | 1200 mm |
Width | Bespoke |
Height | Manufacturer guidancePlease see Thickness |
Uniclass | |
CAWS | H92/776 Thermal insulation P12/360 Mineral wool rigid batts P12/40 Mineral wool rigid batts |
Product range |
Standard | Tested in accordance with ASFP Technical Guidance Document TDG19. |
Third-party certification | IFC Certification IFCC 1712. |
Fire performance | To EN 13501-1, Class A1 (primary stonewool seal). |
Material | Non-combustible stonewool lamella core, with reinforced aluminium foil faces. |
Thickness | 75 mm. |
Cavity width | 26–425 mm. |
Air gap | ≤25 mm. |
Attachment | See Fixing method. |
ThermalConductivity | 0.038 W/m·K. |
Fixing method | Guidance for specification option: Insert requirements.
*Specify galvanized steel (G) or stainless steel (S). |
Fire resistance | To ASFP TGD19, integrity E 90; insulation I 30. |
Colour | Identifying strip colour - green. |
Contains Red List materials | No |
Country of material origin | United Kingdom |
Country of product manufacture | United Kingdom |
Material | Stonewool Aluminium Guidance for specification option: Foil. Intumescent Stone wool Rock fibre mineral wool |
Embodied carbonA1-A3 (production stage) as defined in BS EN 15804 | 1.85 kg CO₂ eq/kg Manufacturer guidance1.85E+00 kgCO2e/kg |
Recyclability | Recyclable Guidance for specification option: The stonewool core is recyclable |
NBS BIM Object Standard
This BIM object has been authored to meet the requirements of the NBS BIM Object Standard.
Find out more about the NBS BIM Object Standard.
Platform | Compatible | Version |
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![]() | - | 5 |
![]() | - | 5 |