• Document: PROTOTYPE PRODUCT ASSESSMENT
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PROTOTYPE PRODUCT ASSESSMENT PPA No 08/P002 Issue date: 12 June 2008 (Amended) DUPONT CLIMATE SYSTEM Expiry date: 30 June 2009 Holder DuPont de Nemours (Luxembourg) S.à r.l. Rue General Patton L-2984 Luxembourg Tel: 01275 879770 Fax: 01275 879773 e-mail: tyvek.construction@lux.dupont.com website: www.construction.tyvek.com This document is intended to assist specifiers, regulators, contractors and others considering the use of prototype products(1), and their use in construction systems. In this regard, this document is a precursor to full Agrément approval, which may be granted following experience in use and surveillance of full factory production control procedures. Generic type of construction product and use The DuPont Climate System is for use as a complete membrane system for normal housing structures, contributing to wind and weather resistance, improved insulation levels, reduced risk of condensation and will enable the building envelope to breathe. The system comprises: (1) Tyvek Enercor Roof — a vapour-open roof tile underlay with a metallised, low-emissivity surface placed on the cold side of traditional insulation to reflect heat in summer and reduce heat loss in winter. The underlay consists of Tyvek membrane 60 gm–2 coated with an aluminium lacquer on an EVA bonded fleece 72 gm–2 (2) DuPont AirGuard — a 100% airtight vapour control layer with a metallised surface and low emissivity. It is placed on the warm side of the insulation at roof, wall and floor level with the metallised surface facing the interior of the building (3) Tyvek Reflex — is a vapour open wall underlay with a metallised low emissivity surface which reflects heat in summer and reduces heat loss in winter. The underlay consists of Tyvek 80 gm–2 coated with an aluminium lacquer (also subject of BBA Certificate No 90/2548, Product Sheet 3). Tyvek Enercor roof is ideally used as a roof underlay in combination with a VCL, like Dupont Airguard. Combining an LR underlay with a VCL installed on the warm side of the thermal insulation is the best solution to ensure a good airtightness and reduce the risk of interstitial condensation. Accessories used with the DuPont Climate System (roofs) are: • Tyvek Metallised Tape — to close laps between Tyvek Enercor Roof and Airguard membranes to make the building fabric airtight • Tyvek Butyl Tape — used to connect the Tyvek Enercor Roof and Airguard membranes to wood or masonry. Tyvek Reflex is ideally used in timber-frame wall construction in combination with a VCL, like Dupont Airguard. Combining an LR underlay with a VCL installed on the warm side of the thermal insulation is the best solution to ensure a good airtightness and reduce the risk of interstitial condensation. Accessories used with DuPont Climate System (walls) are: • Tyvek Metallised Tape to close laps between Tyvek Reflex layers to make the building fabric airtight • Tyvek Butyl Tape can be used to connect the

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