Britannia Paints Limited

Polyshield 15 Roof Waterproofing System

Manufacturer: Britannia Paints Limited 

Materials: Thermoplastic Block Copolymers 

The Polyshield 15 Roof Waterproofing System is a single-pack, rubber-based, cold liquid-applied, reinforced coating comprising:
• Polyshield Primer — a rubber-based primer for preparation of substrates such as concrete, asphalt, timber and mineral felt
• Britannia Zinc Phosphate Metal Primer — a primer for the preparation of metal substrates
• Britannia QD Universal Primer-Sealer — a primer for the preparation of single-ply membranes
• Polyshield 15 Basecoat — a single-pack, rubber-based, cold liquid-applied embedment and saturation layer, available in grey
• Polyshield 15 Topcoat — a single-pack, rubber-based, cold liquid-applied roof waterproofing, available in grey, black
and solar-reflective white
• Polyshield Scrim — a stitch-bonded polyester mesh for embedding into the basecoat and additional reinforcement
for detailing, expansion joints and construction joints.


BBA logo

Number: 13/5042
Issue date: 31/03/2021

Approved for use on


Flat Roofs Pitched Roofs Zero Falls Buried Roofs 

For use as a liquid-applied waterproofing layer on limited access flat and pitched roofs, and protected zero fall cold roofs.

Substrate


Concrete Mastic Asphalt Reinforced Bituminous Membranes Single Ply Membranes - PVC Steel Timber 

The system is suitable for use on substrates of:

• concrete
• mastic asphalt
• bituminous roofing felt
• steel
• timber
• PVC plastisol coated metal
• PVC single-ply waterproofing membrane.

Durability


15 Years 

Under normal conditions, the Polyshield 15 Roof Waterproofing system will achieve a life expectancy of at least 15 years.

Installation Requirements


Installation of the system must be carried out in accordance with the relevant clauses of BS 8000-0 : 2014, BS 8000-4 : 1989, Liquid Roofing and Waterproofing Association (LRWA) Note 7 – Specifier Guidance for Flat Roof Falls, the Certificate holder’s instructions and this Certificate, and only by specialist roofing contractors trained and approved by the Certificate holder in accordance with their installation instructions.

Fire Safety


A system comprising an 18 mm plywood substrate, a 1.6 mm layer of bitumen felt, one layer of Polyshield 15 Basecoat applied at a rate of 1 ℓ·m–2 with Polyshield Scrim embedded in the coat, and one layer of Polyshield Topcoat applied at a rate of 0.5 ℓ·m–2, achieved an EXT.F.AC classification(1) to
BS 476-3 : 2004 and so is unrestricted under the national Building Regulations.
(1) Fire test report, reference 317117 conducted by Bodycote Warringtonfire. Report available from the Certificate holder.

The system, when used in protected specifications, including an inorganic covering listed in the Annex of Commission Decision 2000/553/EC, can also be considered to be unrestricted under the national Building Regulations.

The designation of other specifications should be confirmed by reference to the requirements of the documents supporting the national Building Regulations.

The system, when used in pitches of greater than 70°, excluding upstands, should not be used on buildings in England and Wales that have a storey at least 18 m above ground level and which contain: one or more dwellings, an institution, a room for residential purposes (excluding any room in a hostel, hotel or boarding house), student accommodation, care homes, sheltered housing, hospitals or
dormitories in boarding schools.

The system, when used in pitches of greater than 70°, excluding upstands, should not be used on buildings in Scotland that have a storey at least 11 m above ground level.

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Britannia Paints Limited

Unit 7/8, King Street Trading Estate
Middlewich
CW10 9LF

T : 01606 834015

E : sales@britanniapaints.co.uk

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