Visqueen Zedex Non-Combustible Flexi Preformed Units

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Visqueen Zedex Non-Combustible DPC and Visqueen Zedex Non-Combustible Flexi Preformed Units awarded BDA Agrement Certificate No. BAW-21-203-P-A-UK Flexi PFU achieves a reaction to fire classification A2 - s1, d0 to BS EN 13501-1:2018 Flexi PFU shear strength tested to BS EN 1052-4:2000 Methods of test for masonry - Part 4. Flexi PFU flexural mortar bond strength tested to DD 86-1:1983 Visqueen certified with Quality Management System ISO 9001:2015 Visqueen certified with Occupational Health and Safety System ISO 45001:2018 Visqueen certified with Environmental Management System ISO 14001:2015

Visqueen Zedex Non-Combustible Flexi Preformed Units are designed for detailing complicated cavity tray junctions in cavity wall constructions including those with a structural framing system inner leaf and a masonry outer leaf, in residential, commercial and multi-storey buildings. In conjunction with Visqueen Zedex Non-Combustible DPC cavity tray and associated system components, the units are used where a DPC cavity tray is required that achieves a minimum reaction to fire classification A2 - s1, d0 to BS EN 13501-1:2018. Visqueen Zedex Non-Combustible Flexi Preformed Units are purpose-designed for use with a surface fixed, sloping Visqueen Zedex Non-Combustible DPC cavity tray featuring a 150mm vertical rise between the outer and inner leaves. The corresponding cavity tray profile is illustrated in Visqueen Drawing DPC-ZXNC-01 and DPC-ZXNC-03. These preformed units are designed to accommodate 90° corners but can be adjusted on-site to suit alternative angles such as 135° for external corners or 80° for internal corners. When adapting the units for non-90° corners, any overlap pockets created must be fully sealed using Visqueen Zedex Mastic. Visqueen Zedex Non-Combustible Flexi Preformed Units are not specifically designed for use with: • an L shaped cavity tray profile • a cavity tray profile that incorporates a horizontal insulation ledge • a built in cavity tray • a cavity tray vertical rise other than 150mm However due to their flexibility, the units can often be manipulated to achieve these alternative cavity tray profiles. Care should be taken by the Designer to ensure suitability for applications other than those stated above. Visqueen Zedex Non-Combustible Flexi Preformed Units should be approved by all stakeholders prior to use. To simplify complicated or awkward cavity tray junctions e.g. corners, steel columns, changes of level, etc., an extensive range of Visqueen Non-Combustible Preformed Units (rigid units manufactured from stainless steel) and Visqueen Zedex Non-Combustible Flexi Preformed Units (flexible units manufactured from Zedex Non-Combustible DPC) are available. Either type of unit can be used or they can be used in combination on the same project e.g. Flexi units at some corners and stainless steel units at others. Final decision on what is installed will lie with the stakeholders e.g. installer and design team.

Visqueen Zedex Non-Combustible Flexi Preformed Units should be stored under cover in their original packaging. Care should be taken when handling the product in line with current manual handling regulations.

Visqueen Zedex Non-Combustible Flexi Preformed Units can be cut with a sharp retractable safety knife or robust scissors. Ensure that the unit is suitable for the external wall cavity width; the cavity width is measured from the cavity face of the inner leaf e.g. weather defence sheathing board, to the cavity face of the masonry outer leaf.

DPCs and DPC cavity trays systems should be designed and installed in accordance with the relevant sections of BS 8215:1991, PD 6697:2019 and BS 8000-3:2020. Visqueen Zedex Non-Combustible Flexi Preformed Units must be installed with the red surface facing upwards or outwards i.e. facing towards the direction of moisture penetration. NB During installation, internal corner units must be manipulated so that the red surface faces upwards or outwards. When built into the outer leaf of a masonry wall construction the preformed units should be installed on an even bed of fresh mortar, and any perforations in adjacent courses of masonry should be completely filled with mortar. To ensure mortar adhesion, as soon as possible after laying the preformed units, lay at least one further course of masonry including a fresh bed of mortar. The preformed units must extend through the full thickness of the masonry wall, including pointing, applied rendering or other facing materials. The preformed units are designed to be surface fixed (face fixed) to the inner leaf and allow for a 150mm vertical rise in the cavity tray profile. When surface fixing the preformed unit to concrete or metal substrates, the vertical flange of the unit should be permanently secured using Visqueen Non-Combustible Fixing Strip and stainless steel fixings suitable for the substrate. Use of Visqueen Zedex Mastic to hold the vertical flange of the preformed unit in position is optional and for installation convenience only. When surface fixing the preformed unit to weather defence sheathing boards, the vertical flange of the unit should be permanently secured using 12mm shank austenitic stainless steel staples at 150mm centres. Use of Visqueen Zedex Mastic to hold the vertical flange of the preformed unit in position is optional and for installation convenience only. All DPC to Visqueen Non-Combustible Flexi Preformed Unit laps should be 100mm and fully sealed with Visqueen Zedex Mastic (refer to Visqueen Zedex Mastic datasheet). In accordance with British Standard codes of practice and warranty provider standards, to ensure long term lap integrity, all laps should be fully supported and the support should remain in position. Unless formed over a permanent rigid supporting substrate, all laps should be formed with a Visqueen DPC Joint Support positioned directly beneath the lap. When Visqueen Non-Combustible Flexi Preformed Units are used for cavity widths less than the maximum designed for the unit, any excess DPC material protruding from the outer leaf should be carefully removed with a sharp retractable safety knife.

It is recommended that Visqueen Zedex Non-Combustible Flexi Preformed Units and associated system components should not be installed below 5°C.

The information in this datasheet was correct at the time of publication. It is the user’s responsibility to obtain the latest version of the datasheet as it is updated on a regular basis. The information contained in the latest datasheet supersedes all previously published editions. Visqueen Zedex Non-Combustible Flexi Preformed Units data table

Refer to the Visqueen Zedex Non-Combustible Flexi Preformed Units safety datasheet (SDS).