Spec

damp proof membrane, dpm, damp-proofing, damproofing, DPM, damp proof membrane, damp proof membrane, Agrement BDA BBA

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Third party accreditation (BBA 94/3009) UKCA UKNI CE to EN 13967:2017 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 DPM is suitable for use in ground floor constructions, positioned above or below the structural floor, to protect buildings against moisture from the ground. The product is not intended for use where there is a risk of hydrostatic pressure or accredited for radon applications. Suitability for use of 0.25mm (1000 gauge) Visqueen DPM should be confirmed and approved by all stakeholders prior to use.

Visqueen DPM should be stored horizontally, under cover in its original packaging. Care should be taken when handling the product in line with current manual handling regulations.

Visqueen DPM should be installed on a smooth continuous surface e.g. grouted beam and block floor, a compacted blinding layer e.g. 50mm thick sand blinding, or smooth concrete blinding. The substrate should be free from irregularities such as voids or protrusions. The membrane can be cut with a sharp retractable safety knife or robust scissors.

Visqueen DPM should be loose laid on the substrate. The membrane should be clean and dry at the time of jointing. It should be overlapped by a minimum of 150mm, bonded with VisqueenPro Double Sided Jointing Tape and sealed with VisqueenPro Single Sided Tape. Damp proofing seals should be formed around all service entry points. Visqueen Preformed Top Hat Units are available for sealing service entry pipe junctions. The base of the top hat and the upstand should be bonded using VisqueenPro Double Sided Jointing Tape and sealed with VisqueenPro Single Sided Tape. The upstand should be secured with the supplied jubilee clip. Alternatively VisqueenPro Detailing Strip or Visqueen NF-Detailing Strip can be used to seal service entry pipe detailing. Forming an effective barrier to damp with the membrane may give rise to complex three-dimensional detailing. To simplify complex or awkward junctions e.g. internal and external corners Visqueen Preformed units are available. Alternatively VisqueenPro Detailing Strip or Visqueen NF-Detailing Strip can be used to seal awkward junctions. If the membrane is punctured or perforated a patch of the same material should be lapped at least 150mm beyond the limits of the puncture and bonded with VisqueenPro Double Sided Jointing Tape and sealed with VisqueenPro Single Sided Tape. Alternatively a patch can be formed using VisqueenPro Detailing Strip or Visqueen NF-Detailing Strip lapped at least 150mm beyond the extents of the puncture. The membrane should be covered immediately after installation to prevent damage from following trades, ultraviolet light, etc. Care should be taken to ensure that the membrane is not punctured, stretched or displaced when applying the final floor covering. When reinforced concrete is to be laid over the membrane the wire reinforcements and spacers must be prevented from puncturing the membrane. Where there is a potential risk of damage, the membrane should be covered with Visqueen TreadGuard protection, screed, or other approved protection material before positioning the reinforcement. In areas where high levels of settlement are anticipated, Visqueen Pre Applied Membrane should be considered.

It is recommended that Visqueen DPM and all associated system components should not be installed below 5°C.

Please note that this product was previously know as Visqueen EcoMembrane DPM. To assist build sequencing, Visqueen Zedex CPT High Performance DPC is available for damp protection through masonry wall constructions. Please note that Visqueen DPM is NOT accredited for radon applications. Please use either Visqueen RadonBlok 400, RadonBlok 600, or Visqueen Radon R400 Membrane. For additional detailing information, for welding options, or for further guidance on the selection of the most appropriate thickness of membrane, contact Visqueen Technical Office on +44 (0) 333 202 6800. 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.

Refer to Visqueen DPM material safety datasheet (SDS).