Demarcation systems are designed to provide a high visibility maintenance free system product that remains on the roof to act as a hazard warning system.

These non-fall arrest products have been introduced to satisfy the Health & Safety Executive guidance note HSG 33 Health & Safety in Roofwork which recommends that demarcation systems should be immediately obvious and project above the main roof decking – “markings at foot level are not a suitable alternative…,” which implies that painted lines on roofs are not acceptable as a means of demarcation.

In many cases, demarcation is required to a specific piece of plant/equipment in the centre of a large roof. This is where the demarcation system can be used in place of edge protection solutions, providing the demarcation is set in at least 2m from the roof edge. The system can equally be used at ground level for alternative types of demarcation such as trade shows, machinery demarcation, stately homes and castles.

Applicable UK Standards & Guidance

There are no Standards for these types of products, however it would be advisable to carry out a wind speed calculation to ensure suitability

Levels of Safety

Demarcation Systems provide a “safe-zone” within which operatives can work safely. Should an operative choose to stray outside this “safe-zone” without appropriate PPE then they may be approaching hazardous areas.

Design Considerations

Access & Maintenance Strategy

A formal Access & Maintenance Strategy Plan should be developed which considers the access & maintenance requirements of a building or structure over its life.

The Layout

Demarcation Systems must be installed at least 2.0mtrs away from any fall hazards e.g. exposed roof edges or unprotected fragile surfaces

Design Loads

Wind speed calculations may be required, depending on location and height of the building

User Considerations

It is a requirement of the Work at Height Regulations 2005 that persons involved in work at height, including those planning, managing & supervising work at height are competent to do so.

Once installed, demarcation systems require little input on the part of the user. However, it is important to understand their limitations. Training and/or information should be provided.


Provision & Use of Work Equipment Regulations (PUWER)

Regulation 6 requires that inspections of work equipment are made and that records of the inspections are maintained.

Workplace (Health Safety & Welfare) Regulations

Regulation 5 requires the employer and/or the person in control of premises must maintain the workplace and contents so that they remain safe and without risk to health and fully comply with the detailed requirements of the regulations.