Glass reinforced polyester for flat roofing

The purpose of this standard is to provide the delegate with the knowledge to glass reinforced polyesters to a roof.

1 Title

Glass Reinforced Polyesters for Flat Roofing


Minimum 1 day of 6 learning hours


The purpose of this standard is to provide the delegate with the knowledge to glass reinforced polyesters to a roof.


· how to plan the work

· health and safety

· how to handle and store materials

· how to prepare the roof

· what to do if the weather deteriorates

· how to clean up

· UK / European guidelines

Occupational relevance

Training delivered against this standard would be relevant to the following occupational groups:

· operative and craft

· supervision


There are no delegate pre-requisites as part of this standard. However, a basic knowledge of built up membrane roofing terminology and techniques would be beneficial.

Instruction/ supervision

As a minimum, course trainers must be able to demonstrate that, in relation to this standard, they have:

· an award in education and training (or equivalent, as per requirements for approved training organisations

· successfully completed training to this standard

· any standard specific training or professional membership

· at least 2 years relevant industrial experience

· a verifiable CV


Delivery may be in an on or off the job environment.

All materials and equipment must be of a suitable quality and quantity for delegates to achieve learning outcomes and must comply with relevant legislation.

The class size and delegate/trainer ratio must allow training to be delivered in a safe manner and enable delegates to achieve the learning outcomes.

The following delivery methods may be used in the delivery of this standard:

· classroom

· a blend of classroom and remote


This standard is considered to contain 51% or more practical training.

This standard is considered to be set at a basic level.



For the successful completion of training, delegates must complete a practical or knowledge assessment. The assessment must cover all learning outcomes.

Where this training is assessed using multiple-choice questions, a minimum of 10 questions must be asked and delegates are required to achieve an overall pass mark of at least 80%.

Quality assurance


Quality assurance against this standard will require initial approval of the training organisation and their content mapped to the standard.

CITB will also conduct an approval intervention, either desk-based or centre visit, to ensure the training organisation can meet the requirements of the training standard.

Approved training organisations (ATOs) will be required to present information on records of training and assessment upon request to CITB for desk-based analysis. They will also be visited annually by the CITB quality assurance team.


There are no mandatory renewal or recommended refresher requirements for this standard.


Approval date

December 2020

Review cycle

On request or 3 years from approval date.

Learning Outcomes

The delegate will be able to:

Additional Guidance to Support Learning Outcome

describe a glass reinforced polyester product

to include:

· advantages

· disadvantages

· examples of GRP products

describe the fixing of a glass reinforced polyester

to include:

· examples of fixing techniques

describe recommended distance between fixings


complete the plan of work

to include:

· process, start, exit, grid out, foot traffic, and snag

· manufacturer’s instructions

· roofing drawings

· requirements/specifications

carry out work safely

to include:

· environmental/safety legislation

· safe work practices/procedures

· identify hazards

· risk assessments

· reduce/eliminate risks


· SDS sheets for COSSH

· use controls

· videos of good and bad practice

describe how to handle and store materials

to include:

· SDS sheets for COSSH

demonstrate how to install a new GRP section or corner


demonstrate how to prepare and cut the GRP


demonstrate how to apply bituminous primer using a brush/roller/spray


demonstrate how to apply waterproofing to GRP section


demonstrate how to apply bedding glass-reinforcement for liquid waterproofing

to include:

· check kerbs

· edge trims

demonstrate how to apply top coat for liquid waterproofing using a brush/roller/spray

to include:

· gridding out

· wet film thickness gauge

· rectify wicks and pinholes

demonstrate how to finish the job

to include:

· quality checks

· snagging

· examples of finished sections of GRP

describe what to do if the weather deteriorates

to include:

· before, during, and after application of waterproofing

· hot, cold, windy, and wet weather

demonstrate how to clean up and dispose of waste materials


recognise the importance of regularly referring to UK / European guidelines


Additional information about this standard

Training at height

BS 8454:2006 Code of practice for delivery of training & education for work at height and rescue

Advisory Committee for Roof Safety

Further information about roof safety:

Health & Safety Executive (HSE) Working at height guides

Working at height:

HSE Guides

Health & Safety at Work etc Act 1974:

Health and safety in construction:


Health and Safety at Work etc Act (HSWA) 1974

The Work at Height Regulations (WHR) 2005

Work at Height (Amended) 2007

Building regulations

Building and Buildings, England and Wales: The Building Regulations 2010.

The Building (Scotland) Regulations 2004

Statutory Rules of Northern Ireland

British standards

BS EN 1847: 2009. Flexible sheets for waterproofing. Plastics and rubber sheets for roof waterproofing. Methods for exposure to liquid chemicals, including water.

BS 6229: 2003 Flat roofs with continuously supported coverings. Code of practice.

BS 5250: 2011+A1: 2016. Code of practice for control of condensation in buildings.

Building information modelling (BIM)

BIM is software which creates a three-dimensional model of a building. Examples of liquid applied membrane roofing systems can be viewed in the National Building Specification ‘National BIM Library’ at:

Liquid Roofing Waterproofing Association (LRWA)

The LWRA provides free downloads of technical information PDFs: 

Related standards


Abrasive wheels, Asbestos awareness, First aid, Manual handling and Working at heights

General roofing

Roof felt products and application

Roof structures terminology and types

Liquid roofing

Adhesives, sealants and bitumen

Balconies, podiums and inverted roof systems

Car parks, products and application methods

Details, terminations, flashings, gutters, night seals, faults and rectification

Environmental and sustainability for liquid roofing

Green roofs

Hot applied roof membranes, rubberised bitumen

Inspection, maintenance and repairs

Insulation calculations, condensation risk and vapour control layers

Insulation types and thermal properties

Introduction to liquid roofing (e-learning)

Leak detection methods

Liquid applied membranes introduction

Liquid spray systems

Polymethyl methacrylates (acrylic glass)

Preparation of flat roofs

Project planning and preparation

Recoating roofs of metal, asbestos, and fibre-cement

Resilient polyesters

Rooflights, maintenance and waterproofing

Single pack polyurethanes

Silicane terminated polyethers

Tapered insulation systems

Two pack polyurethanes and flexible polyesters