SIDERISE RH | Cavity Barriers for Ventilated Cladding _ Rainscreen – Horizontal
by Siderise
Description
Siderise RH ‘Open State’ horizontal cavity barriers consist of a non-combustible stone wool 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 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 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:
- IFC Certified (IFCC 1712)
- Allow continuous ventilation and drainage behind the rainscreen envelope
- Tested to ASFP TGD19 ‘Fire Resistance Test of Open State Cavity Barriers’ utilising BS EN 1363-1 and Principles of BS EN 1366-4
- Provides up to 120 minutes fire integrity and 120 minutes insulation- (RH25-120/120). *Please note: RH25-120/120 was tested with min. 50mm thick stone wool thermal insulation (classified A1 to EN 13501-1) above and below the cavity barrier.
- Suitable for horizontal (open void) applications
- All horizontal cavity barriers are colour-coded for ease of identification
Object Data
1 Revision
Last Updated
29/01/2025
Available Software
BS1192:4
Compliant
BSB
Compliant
EPD
Not Available
Sustainability & Environmental Data
Generic Sustainability Data from LCA
This data is based on generic material data.
- Biogenic CO2e (A1-A3,B1-B5,C1-C4) kg
- Total CO2e (Fossil) kg
- Manufacturing (A1-A3) 1.24 kg
- Transport to Site (A4) kg
- On-Site Installation (A5) kg
- Use & Maintenance (B1-B5) kg
- End of Life (C1,C3,C4) kg
- Recycled Content %
- Recyclable Content %
- Re-use Potential %
- Energy Recovery Possibility %
- Water Use L
- Ozone Depletion Potential mg CFC-11eq
- Expiry-
Environmental Product Declarations
There are no EPDs.
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Bimstore on 22 February 2025
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