Paracoat Duo 20

Manufacturer: Langley Waterproofing Limited

Materials: Polyurethane

Paracoat 20 is a polyurethane liquid-applied roof waterproofing system which comprises:
• Paracoat Base Coat — a red, one-part polyurethane for use as the first waterproofing and embedment coat of the roofing system
• Paracoat Top Coat — a one-part polyurethane for use as the second waterproofing coat of the roofing system
• Embedment Fleece — a 225 g·m–2 glassfibre mat for use in reinforcing the system
• Langley PU Primer — for preparing substrates prior to application of the system and, when required, reactivating Paracoat Base Coat
• Paracoat Epoxy Metal Primer — a two-part primer for preparing metal substrates, including solar reflecting paint, prior to application of the system
• Langley PVC Primer — for preparing PVC-U surfaces (window sills/rooflight kerbs) prior to application of the waterproofing.

Paraquartz 20 is a polyurethane liquid-applied roof waterproofing system with wear resistance and anti-slip properties which comprises:
• Paraquartz Base Coat — a red, one-part polyurethane for use as the first waterproofing and embedment coat of the balcony/walkway system
• Paraquartz Top Coat — a one-part polyurethane for use as the second waterproofing coat of the balcony/walkway system
• Embedment Fleece — a 225 g·m–2 glassfibre mat for use in reinforcing the system
• Paraquartz Chippings — 0.7 to 1.2 mm aggregate for use in the Paraquartz 20 system to improve slip and wear properties. Available in light grey, dark grey, black and red
• Paraquartz Clear Sealer Coat — a sealer coat for Paraquartz Chippings
• Langley PU Primer — for preparing substrates prior to application of the system and, when required, reactivating Paraquartz Base Coat
• Paracoat Epoxy Metal Primer — a two-part primer for preparing metal substrates, including solar reflecting paint, prior to application of the system
• Langley PVC Primer — for preparing PVC waterproofing membranes and, if necessary, PVC-U surfaces (window sills/rooflight kerbs) prior to application of the waterproofing
• Paracoat TPO Primer — for preparing TPO waterproofing membranes
• Paracoat EPDM Primer — for preparing EPDM waterproofing membranes

Number: 14/5162 PS1
Issue date: 21/12/2021

Approved for use on

Balconies, Terraces & Walkways Flat Roofs Pitched Roofs

The Paracoat 20 system is satisfactory for use as a roof waterproofing membrane on flat and pitched roofs with limited access.

The Paraquartz 20 system is satisfactory for use as a waterproofing membrane on balconies with pedestrian access and walkway areas on flat roofs.

Substrate

Concrete Mastic Asphalt Metal Reinforced Bituminous Membranes Single Ply Membranes - EPDM Single Ply Membranes - PVC Single Ply Membranes - TPO Timber

The systems are for use on substrates of:
• concrete
• mastic asphalt
• metal
• reinforced bitumen membranes (including mineral surfaced)
• single-ply membranes (PVC, TPO and EPDM)
• wood
• insulation boards in conjunction with a carrier membrane.

Durability

20 Years

Results of accelerated weathering tests confirm that a satisfactory retention of properties is achieved. All available evidence indicates that the systems should achieve an initial life expectancy of at least 20 years.

Installation Requirements

The systems should only be installed by contractors who have been trained and approved by the Certificate holder.

Fire Safety

When tested to ENV 1187 : 2002 and classified in accordance with BS EN 13501-5 : 2005, a system comprising a 6 mm calcium silicate board, Paracoat Base Coat applied at 1.0 kg·m–2 reinforced with 225 g·m–2 Embedment Fleece, and Paracoat Top Coat applied at 0.75 kg·m–2, achieved a classification of BROOF(t4).

The designation of other specifications, eg when used on combustible substrates, should be confirmed by: England and Wales — test or assessment in accordance with Approved Document B, Appendix A, Clause 1 Scotland — test to conform to Mandatory Standard 2.8, clause 2.8.1(1)(2). (1) Technical Handbook (Domestic). (2) Technical Handbook (Non-Domestic). Northern Ireland — test or assessment by a UKAS-accredited laboratory, or an independent consultant with appropriate experience.