Polyroof Products Limited

Polyroof 185 and Polyroof 185 non-slip roof waterproofing systems

Manufacturer: Polyroof Products Limited 

Materials: Glass Reinforced Resilient Unsaturated Polyester Resins (GRP) 

Polyroof 185 and Polyroof 185 Non-slip Roof Waterproofing Systems consist of a glassfibre reinforced polyester resin, cold-applied on site by the hand lay-up process to a minimum thickness of 1.5 mm. The non-slip grade incorporates a gritting agent in the topcoat to provide the non-slip surface.

The systems comprise:

  • PolyBase — an unsaturated polyester resin for use as Polyroof basecoat
  • Polyroof 185 Top Coat — an unsaturated polyester resin for use as Polyroof topcoat
  • Polymat — a glassfibre chopped strand mat reinforcement
  • catalyst — an organic peroxide supplied in powder form
  • pigment — a thixotropic paste available in a number of colours
  • Polygrit — a gritting agent to provide a non-slip surface on trafficked areas
  • PolyBase/Polyroof 185 Accelerator — an additive to enable low-temperature application down to 1°C

BBA logo

Number: 91/2604
Issue date: 25/11/2022

Approved for use on

Balconies, Terraces & Walkways Green Roofs Inverted Roofs Pitched Roofs Protected Roofs Zero Falls Buried Roofs 

For use as a waterproofing system on flat, pitched and protected zero fall roofs with limited access and internal gutters in warm, cold, inverted and green roof specifications. Polyroof 185 Non-slip is satisfactory for use on verandas, terraces or walkways on flat roofs



Polyroof 185 and Polyroof 185 Non-slip Roof Waterproofing Systems should only be applied to plywood and OSB3 (orientated strand board) substrates that are approved by the Certificate holder. Where written approval is given by the manufacturer, other substrates may be permitted, where appropriate, provided they comply with NHBC Standards 2018, Chapter 7.


25 Years 

A GRP laminate constructed in accordance with the Installation Guide and formed in satisfactory weather conditions can be expected to maintain its integrity and show no measurable loss of physical properties for a period of 30 years. However, the systems will have a minimum life expectancy of at least 25 years provided there is no abnormal movement of the roof structure and the roof is subject to the normal regular inspections and maintenance.

When fully protected and subject to normal service conditions in an inverted roof specification with an open covering (eg aggregate pavers), the systems can provide an effective barrier to the transmission of liquid water and water vapour for the design life of the roof in which they are incorporated. However, in situations where maintenance or repair of any of the components in the roof structure are necessary (eg the protection layer or insulation), the durability of the membrane may be reduced. In these circumstances the Certificate holder should be consulted.

An estimate cannot be given for the life of green roof specifications owing to the nature of use; however, under normal circumstances, it should be significantly greater than for exposed waterproof coverings.

Installation Requirements

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

Fire Safety

A system comprising Polyroof 185 applied to a 18 mm thick plywood substrate, when tested to DD CEN/ TS 1187 : 2012 Test 4 and classified to BS EN 13501-5 : 2005, is designated as BROOF(t4).

The systems, when protected by an inorganic covering (eg gravel or paving slabs) listed in the Annex of Commission Decision 2000/553/EC, can be considered to be unrestricted under the national Building Regulations.

The designation of other specifications (eg on combustible substrates) should be confirmed by: England and Wales — test or assessment in accordance with Approved Document B, Appendix A, Clause A1, Scotland — test to conform to Technical Standard 2.8, clause 2.8.1, Northern Ireland — test or assessment by a UKAS-accredited laboratory or an independent consultant with appropriate experience.

In the opinion of the BBA, when used in irrigated green roofs the systems will also be unrestricted.

If allowed to dry, plants used in a roof garden may allow flame spread across the roof. This should be taken into consideration when selecting the plants. Appropriate planting irrigation and/or protection must be applied to ensure that the overall fire-rating of the roof is not compromised.

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Polyroof Product Ltd

Furness House
Castle Park Industrial Estate
Flintshire CH6 5XA

T : 01352 735135

E : info@polyroof.co.uk

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