Siderise EW Closed State Cavity Barrier and Firestop
Cavity barriers and firestops to protect compartment lines and around openings in masonry walls
Closed state cavity barrier and firestop
EW Cavity Barrier and Firestop provides effective compartmentation in external masonry walls, with friction fit options available for cavities up to 350mm. The product features a Lamella insulation core comprising durable vertically oriented stone wool fibres compressed under factory-controlled conditions and held in place with aluminium foil facings heat-bonded to the cut face of the fibres. Lamella is key to accommodating site tolerances and localised common imperfections in brickwork.
The product installation requires fixing brackets and jointing tape all supplied by Siderise as part of a complete package. Friction fit options for EW-CB30 and EW-FS120 for voids up to 350mm and EW-F60 for voids between 51mm to 300mm means products do not need to be installed with compression and can be applied to wet brickwork without compromising the stability of the wall structure.
The stone wool Lamella composition allows EW Cavity Barrier and Firestop to be effortlessly notched. This means components commonly interrupting the firestopping line e.g. masonry support brackets, can be easily accommodated
Testing to EN1366-4 and third-party certification through IFC 1830 covers both horizontal and vertical applications and incorporates fixing brackets and aluminium foil jointing tape
EW Closed State Cavity Barrier and Firestops products have been assessed under the CCPI scheme. Assessment Number: 000800104/1126
To suit specific cavity barrier and firestop specification requirements, EW Cavity Barrier and Firestop is available with fire resistance performance ratings ranging from 30mins to 120 mins for 20mm voids (horizontal and vertical), up to 350mm voids (horizontal) and 450mm voids (vertical)
To demonstrate compatibility and provide assurance that performance is not compromised, EW Cavity Barrier and Firestop incorporating DPCs has been tested to EN 1366-4, and EW-FS120 has been tested with masonry support angles with differing levels of penetrations
External masonry wall cavity barrier and firestop systems
Closed state fire protection solutions for masonry constructions
Siderise EW Systems have been developed to provide a tested method of sealing external wall cavities for fire and smoke in external masonry constructions.
The EW product range is for use as a Cavity Barrier or Firestop in accordance with the guidance supporting the national Building Regulations.
Friction fit is available (see tables 2 & 3 for applicable voids) to support installation with ‘green’ brickwork, which brings considerable advantages to the construction timeline.
Please note that some void ranges are only available with a compression fit and may be unsuitable for green brickwork. Care should be taken when installing under compression to ensure mortar has cured adequately to prevent deformation of the masonry outer leaf.
In addition to providing an effective seal against the passage of smoke and fire, the products are also acoustically absorptive.
These products represent an ideal combination of fully qualified performance and practical installation.
3rd party product approval is provided by IFC Certification (IFCC 1830).
Siderise EW Systems comprise of a low resin content stone wool insulation core which is pre-compressed internally to form a resilient strip. The material is faced on two sides with reinforced aluminium foil which is an effective smoke barrier. Available in the following forms:
Pre-cut Strips
- Pre-cut products are available in 1mm increments of width to suit the cavity size. Please see Table 2 & 3 regarding 'fit type'.
- Supplied with appropriate brackets as part of a system.
Sheets
- Standard sheet size is 1200 x 1200mm and may be of benefit when the actual void size is not known or to accommodate site tolerance (where the void may vary significantly).
- Appropriate brackets must be ordered separately.
Siderise EW should be installed in accordance with PD6697:2019 - 'Recommendations for the design of masonry structures to BS EN 1996-1-1 and BS EN 1996-2'.
- Horizontal - EW must be installed with a suitable cavity tray immediately above.
- Vertical - EW must be installed with a DPC extending a minimum of 25mm into the cavity on either side. DPC to be sourced separately. If requested by Building Control / Warranty provider the DPC can be optionally secured with Siderise RFT 120/45 foil tape.
Reaction to Fire
This is the response of a material in contributing by its own decomposition to a fire to which it is exposed under specified conditions. Results are classified to EN 13501-1.
Siderise EW Systems are classified as A1 to EN 13501-1:2018. This is detailed further in Third-party certification with Intertek. Please see Table 1 for further information.
Table 1: Reaction to Fire Performance
Properties | Value |
---|---|
Classification |
A1 to EN 13501-1 |
Certificate No. |
WHI-09/02-22-000001-03 (UK) WHI20-32944302 (US) |
Thickness Range |
50-175mm* |
Substrates |
Mechanically fixed to gypsum or any other A1 or A2-s1, d0 substrate |
Joints |
With or without joints |
*Please note that the thickness declared here refers to reaction to fire testing (supported by certificates - WHI-09/02-22-000001-03 (UK) & WHI20-32944302 (US)) carried out on the base material from which EW is manufactured and so covers a wider range than the thicknesses used for EW resistance to fire testing shown in table 2 and 3.
Resistance to Fire
This is the ability of an element of structure or product to maintain its stability for a specific period as determined by the loadbearing capacity (for structural elements only), integrity and/or insulation against heat transfer specified in the fire resistance test. Results are given in accordance with EN 13501-2.
Siderise EW Systems have been tested in accordance with EN1366-4:2006 + A1:2010 and EN 1366-4: 2021(Only applies to EW-FS60 horizontal voids 51-250mm, EW-FS60 vertical voids 251-450mm and EW-FS120 horizontal voids with MSA – 250mm).
Siderise EW Systems maintained integrity (E) and insulation (I) requirements as detailed in Tables 2-3.
3rd party product approval is provided by IFC Certification (IFCC 1830).
CCPI verified status
EW Closed State Cavity Barrier and Firestops products have been assessed under the CCPI scheme. Assessment Number: 000800104/1126
Table 2: Resistance to Fire to EN1366-4 (Horizontal)
Product Ref | Void Width (mm) | Thickness (mm) | Compression (min.) | Integrity (Mins) | Insulation (mins) | Product Length (mm) | Bracket Requirement | Third-party Certification |
---|---|---|---|---|---|---|---|---|
EW-CB30 |
20 - 50 |
75 |
Gap Width + 10% |
120 |
30 |
1200 |
None. |
IFCC 1830 |
EW-CB30 |
51 - 150 |
75 |
Friction |
90 |
30 |
1200 |
2no.B65/110 600mm centres |
IFCC 1830 |
EW-CB30 |
151 - 250 |
75 |
Friction |
90 |
30 |
1200 |
2no.B195 600mm centres |
IFCC 1830 |
EW-CB30 |
251 - 350 |
75 |
Friction |
90 |
30 |
1200 |
2no.B355 600mm centres |
IFCC 1830 |
EW-FS60 |
20 - 50 |
90 |
Gap Width + 10% |
90 |
60 |
1200 |
None. |
IFCC 1830 |
EW-FS60 |
51 - 150 |
90 |
Friction |
90 |
60 |
1200 |
2no.B65/110 600mm centres |
IFCC 1830 |
EW-FS60 |
151 - 250 |
90 |
Friction |
90 |
60 |
1200 |
2no.B195 600mm centres |
IFCC 1830 |
EW-FS60 |
251 - 300 |
90 |
Gap Width +10mm |
90 |
60 |
1200 |
2no.B355 600mm centres |
IFCC 1830 |
EW-FS120 |
20 - 50 |
120 |
Friction |
120 |
120 |
1200 |
None. |
IFCC 1830 |
EW-FS120 |
51 - 150 |
120 |
Friction |
120 |
120 |
1200 |
2no.B65/110 600mm centres |
IFCC 1830 |
EW-FS120 |
151 - 250 |
120 |
Friction |
120 |
120 |
1200 |
2no.B195 600mm centres |
IFCC 1830 |
EW-FS120 |
251 - 350 |
120 |
Friction |
120 |
120 |
1200 |
2no.B355 600mm centres |
IFCC 1830 |
EW-FS120 with MSA*(1) |
250 (Tested) |
120 |
Friction |
120 |
120 |
1200 |
2no.B355 600mm centres |
IFCC 1830 |
EW-FS120 with MSA*(2) |
250 (Tested) |
120 |
Friction |
120 |
120 |
1200 |
2no.B355 600mm centres |
IFCC 1830 |
EW-FS120 with MSA*(3) |
250 (Tested) |
120 |
Friction |
120 |
120 |
1200 |
2no.B355 600mm centres |
IFCC 1830 |
*Siderise has undertaken additional testing with EW-FS120 which includes masonry support angles (MSA) penetrating the system. For more information on these tests please refer to IFCC 1830 or contact technical.services@siderise.com
(1) In this test specimen the MSA penetrates the product and protrudes from the unexposed face by 18mm
(2) In this test specimen the MSA penetrates the product and is finished flush with the unexposed face and protrudes the exposed face by 15mm
(3) In this test specimen the MSA penetrates the product by 50% and protrudes the exposed face by 75mm
Table 3: Resistance to Fire to EN1366-4 (Vertical)
Product Ref | Void Width (mm) | Thickness (mm) | Compression (min.) | Integrity (Mins) | Insulation (mins) | Product Length (mm) | Bracket Requirement | Third-party Certification |
---|---|---|---|---|---|---|---|---|
EW-CB30 |
20 - 50 |
75 |
Gap Width + 10% |
120 |
30 |
1200 |
None. |
IFCC 1830 |
EW-CB30 |
51 - 150 |
75 |
Friction |
120 |
30 |
1200 |
2no.B65/110 600mm centres |
IFCC 1830 |
EW-CB30 |
151 - 250 |
75 |
Friction |
120 |
30 |
1200 |
2no.B195 600mm centres |
IFCC 1830 |
EW-CB30 |
251 - 350 |
75 |
Friction |
120 |
30 |
1200 |
2no.B355 600mm centres |
IFCC 1830 |
EW-CB30 |
351 - 450 |
75 |
Gap Width +10mm |
120 |
30 |
1200 |
2no.B355 600mm centres |
IFCC 1830 |
EW-FS60 |
20 - 50 |
90 |
Gap Width + 10% |
90 |
60 |
1200 |
None. |
IFCC 1830 |
EW-FS60 |
51 - 150 |
90 |
Friction |
90 |
60 |
1200 |
2no.B65/110 600mm centres |
IFCC 1830 |
EW-FS60 |
151 - 250 |
90 |
Friction |
90 |
60 |
1200 |
2no.B195 600mm centres |
IFCC 1830 |
EW-FS60 |
251 - 450 |
90 |
Gap Width +10mm |
90 |
60 |
1200 |
2no.B355 600mm centres |
IFCC 1830 |
EW-FS120 |
20 - 50 |
120 |
Friction |
120 |
120 |
1200 |
None. |
IFCC 1830 |
EW-FS120 |
51 - 150 |
120 |
Friction |
120 |
120 |
1200 |
2no.B65/110 600mm centres |
IFCC 1830 |
EW-FS120 |
151 - 250 |
120 |
Friction |
120 |
120 |
1200 |
2no.B195 600mm centres |
IFCC 1830 |
EW-FS120 |
251 - 350 |
120 |
Friction |
120 |
120 |
1200 |
2no.B355 600mm centres |
IFCC 1830 |
EW-FS120 |
351 - 450 |
120 |
Gap Width +10mm |
120 |
120 |
1200 |
2no.B355 600mm centres |
IFCC 1830 |
- All brackets are to be suitably fixed to the substrate with non-combustible fixings, or mortared into masonry coursing.
- All brackets to penetrate product at mid-thickness.
- All brackets to penetrate to a depth of 75% of gap width.
- Brackets are available in two forms: (G) denotes galvanised steel brackets and (S) denotes stainless steel brackets.
- Brackets must be installed at 600mm centres based on a 1200mm strip. This can be reduced pro rata for shorter lengths. Please note that 2 brackets are required for any length of barrier greater than 250mm. For lengths ≤250mm a single bracket can be utilised.
- Whilst the EW range has been tested in general accordance with EN 1366-4 in narrow void widths 20-50mm without mechanical fixings and brackets, we note that some supervising authorities may require a form of mechanical fixing. We recommend engaging with the project supervising authorities prior to installation to ensure all their requirements are met.
Friction Fit - product should be sized equal to the void width and installed with no gaps.
Please note product supplied in strip form will have a -0mm/+4mm tolerance.
Compression Fit - the product should be sized to the void width plus a minimum of +10mm or 10% compression (Please see Tables 2 & 3). Care should be taken when installing under compression to ensure mortar has cured adequately to prevent deformation of the masonry outer leaf.
Please see separate installation instructions (available for download from our website) for more information.
When considering Steel Frame Systems (SFS) the supporting substrate should be capable of providing support to the barrier for the required period of fire resistance. For other void sizes or additional advice, please contact Technical Support.
Due to the way cavity masonry façades typically interface with floor slabs it is not usual to rely on elements within the cavity to control flanking noise transfer between floors.
Flanking performance for masonry façades is typically controlled by internal finishes such as high mass plasterboard linings. Siderise EW is not designed with acoustic applications in mind, however as a stonewool product it naturally has some sound absorbing properties.
Please contact our technical department for project specific guidance relating to acoustic performance in masonry applications.
Thermal conductivity : λ = 0.038 W/m.K ±5% (tested foil to foil) to EN 12667: 2001
Damp Proofing
Siderise EW must be damp-proofed in accordance with PD6697:2019 - 'Recommendations for the design of masonry structures to BS EN 1996-1-1 and BS EN 1996-2'.
Siderise EW - Cavity Barriers and Fire Stops
Table 4: Product Properties
Properties | Value |
---|---|
Form Supplied | Sheets: Standard sheet size is 1200 x 1200mm (UK), 1200mm x 1150mm (RoW): Thickness is denoted by the rating. Pre-cut strips: 1200mm length, width available in 1mm increments to suit the cavity size. Pre-cut strips are sized to allow for application of the relevant compression requirement (where applicable). Please see Tables 2 & 3 regarding 'fit type'. Supplied with appropriate brackets as part of a system. |
Reaction to Fire | Classification to EN 13501-1 : 'A1' Please see Table 1 |
Resistance to Fire | 30 to 120 minutes, please see Table 2 & 3 |
Thermal Conductivity | λ = 0.038 W/m.K ±5% (tested foil to foil) to EN 12667: 2001 |
Chemical | The base stone wool is chemically inert. An aqueous extract of the rock wool is neutral (pH7) or slightly alkaline. Resistant to most acids and weak alkaline solutions. |
Biological | Vermin and rot proof and does not encourage the growth of fungi, moulds or bacteria. |
Effect of water | Non-hygroscopic. Unaffected by humid atmosphere. Must be suitably damp proofed in accordance with codes of practice for masonry constructions |
Compatibility | Compatible with all normal building materials. |
Maintenance | No maintenance required unless disturbed. |
Handling | See Material Data Sheet section 7. |
Siderise offers a range of ancillary products to complement the EW range these include:
Fixing Brackets must be used in the installation of the product.
Brackets come in two forms: 'G' - Galvanised Steel Brackets and 'S' - Stainless Steel Brackets.
Brackets are supplied with all EW in strip form, but must be ordered separately for all EW in sheet form.
Aluminium Jointing Tape must be used at all joints and intersections:
- RFT120/45 (120mm wide x 45m rolls)
- Adhesive backed
- Supplied in boxes of 8
Table 5: Physical Characteristics
Properties | Value |
---|---|
Manufacturer and Product Name | Siderise EW |
Product Type | Cavity Barriers and Fire Stops for Masonry External Walls |
Code/Model/Reference/SKU | EW |
Description | See 'Product Description' section |
Application/Use | See 'Application' section |
Material | See Material Data Sheet section 3.1 |
Weight | Individual Precut strips 0.23kg to 5.49kg (75mm thick;20mm width to 120mm thick;450mm width, respectively). Full individual sheets from 8.3 +/- 0.1 kg to approx 13.7+/- 0.4 kg (75mm to 120mm thick respectively). Based on Precut strips and Full sheets at 1200mm lengths. |
Finish /Colour | Solid, green-brown exposed edges with silver aluminium top and bottom facings. |
Packaging | Pre-cut strips packaged in cardboard cartons size; Full sheets packaged on pallets. |
Pack Size | Pre-cut strips packaged in cardboard cartons size up to 1230mm x 610mm ; Max 8 cartons per pallet. Full sheets packaged on pallets 1210mm x 1210mm Packaged pallet max height approx. 2100mm. |
Unit of measure | millimetre (mm) |
Chemical properties/Safety data sheets | See Material Data Sheet section 3.1 |
Size/dimensions (product & installation spatial requirement) | See Table 4 'Form Supplied' |
Shelf life | n/a; Store in dry conditions and protect from mechanical damage. |
The stone wool core is recyclable.
The following information is available for download via the website:
- Third-party Certification - IFCC 1830
- Standard Details
- NBS Specification Clauses
- Installation Instructions
- Material Data Sheet
For technical advice or support please contact: technical.services@siderise.com
For Installation Training or Site Inspections please contact: site.services@siderise.com
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.
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Yes, our site services engineers combine classroom learning with toolbox training and includes mock-up benchmark installations, free-of-charge.
Pre-cut products are available in 1mm increments of width to suit the cavity size. We can also supply standard 1200 x 1200mm sheets where the exact void is not known
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