Siderise EWI Systems have been specially developed via the incorporation of an integral intumescent, which in the event of a fire, provides a reactive method of sealing masonry wall cavities that have an irregular inner face to the outer masonry leaf such as decorative features.
Siderise EWI systems are currently available for horizontal applications with the product codes as below:
These products represent an ideal combination of fully qualified performance and practical installation.
Siderise EWI (open state) for horizontal applications should be installed in conjunction with Siderise EW (full fill) for vertical applications.
Siderise EWI 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 a reinforced Class 0 aluminium foil which is an effective smoke barrier. Siderise EWI incorporates an integral reactive intumescent. The leading edge is encapsulated in a white weather-resistant polymer film.
Siderise EWI is only supplied in pre-cut strips:
If Siderise EWI is in contact with the outer masonry (thereby bridging the cavity), it must be installed with a Cavity Tray directly above. Where there is no contact with the outer masonry leaf (i.e. a continuous uninterrupted air gap) a cavity tray is no longer required, except where otherwise called for such as above openings. Please refer to 3rd party warranty providers, such as NHBC, LABC and Premier Guarantee for further guidance.
Siderise EWI systems have been tested in accordance with TGD 019 Fire resistance test for 'open-state' cavity barriers used in the external envelope or fabric of buildings.
Table 1 : Fire Resistance to ‘General Principles of ASFP - TGD 19’
Siderise EWI has been tested in accordance with the stated test standard for masonry assemblies. The stated classifications (EI) have in some instances been stated lower than achieved in test, this is to keep simplicity in the range as either a 30 minute or 120 minute product. When considering Steel Frame Systems (SFS) it is imperative that the supporting structure to be of at least an equal fire performance rating to that of the Cavity Barrier or Fire Stop.
For other void sizes or additional advice, please contact Technical Support.
Thermal conductivity : λ10 = 0.038 W/m.K (tested foil to foil)
Siderise EWI 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 EWI - Cavity Barrier and Firestops
Table 2 : Product Properties
|Reaction to Fire||Classification to EN 13501-1 : 'A1' (core), 'E' (intumescent) as permitted by ADB.|
|Resistance to Fire||Please see Table 1|
|Thermal Conductivity||λ10 = 0.038 W/m.K (tested foil to foil)|
|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||Easy to handle but should be treated with due care to ensure material integrity and shape are maintained.|
|Storage||Store in dry conditions.|
Siderise offers a range of ancillary products to complement the EWI range these include:
Fixing Brackets must be used in the installation of the product. Brackets come in two types:‘RS’ – split end brackets and ‘B’ – standard brackets, both available in forms:'G' - Galvanised Steel Brackets and 'S' - Stainless Steel Brackets.
Aluminium Jointing Tape must be used at all joints and intersections:
Fire & Acoustic Sealant may be used for small gaps and undulations:
Siderise EWI systems are environmentally friendly:
The following information is available for download via the website:
For technical advice or support please contact the technical team: firstname.lastname@example.org
For Installation Training or Site Inspections please contact: email@example.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.
Published Version: EWI_v1_03_2022038_179