What Edge Protection Does Roof Work Need?

The Work at Height Regulations set out how to prevent falls from roofs. The approach, set out in HSE guidance, is a sequence. Avoid working at height where possible, use equipment that prevents a fall where you cannot avoid it, and use equipment that reduces the distance and consequences of a fall where a fall cannot be prevented. Edge protection, which stops people reaching the edge at all, sits near the top because it protects everyone, whatever their training.

The duty does not vanish because a job is small. A repair to a flashing at the parapet is still work at height, and the person running the job has to plan it, choose suitable equipment and check that the people doing it have the skills. On a project with more than one contractor, the roles under the CDM rules also come into play; our page on CDM regulations for roof work explains who does what.

Take this as background reading rather than legal advice. If you are the owner or occupier, ask any contractor how they will protect the edge before the day begins, and ask to see the method statement.

Collective protection comes in several forms. A scaffold with a full working platform and guardrails around the eaves is the standard answer on larger or longer jobs, and it can double as a safe route for materials. Temporary freestanding guardrail systems are available for flat roofs, weighted or clamped, and need no fixing through the covering. Permanent edge protection, built into the building, is the best option when roofs are visited often for maintenance.

Where a fall cannot be stopped, a net or airbag beneath the work surface can reduce the distance and the harm, and these are often used under large roof sheet replacements. Harnesses and lanyards are personal protection, and they depend on a secure anchor point, trained users and a rescue plan. They sit below collective measures in the order of preference.

On profiled sheet roofs, edge protection has to work together with measures against falling through the surface. Our page on fragile roof safety explains why edge protection alone does not make a roof safe to walk on. A scaffold that blocks a public footway brings in the highway authority; ask the scaffolder who applies for the licence.

A quick job does not remove the need to plan. The regulations expect you to judge the risk, and the shorter the job, the more tempting it is to cut corners. Time on the roof does not make the edge any less dangerous.

What changes is the proportion. For a brief inspection or a minor repair well away from the edge, a risk assessment may point to a lighter approach, such as a safe ladder or a mobile elevated platform, with a controlled access route and no walking near edges or fragile areas. Closer to the edge, or on a roof with weak sheets, the answer shifts to guardrails or a platform. Who decides is someone who has looked at that roof, not a general rule about hours.

Ask how the roof will be reached, what stops a fall at the edge, how openings and rooflights are covered, and how materials will be lifted. Our answer on how often a commercial roof should be inspected shows why routine visits also need a plan for access. A good contractor will explain these points in plain words and write them down.

Responsibility is shared. The contractor must plan and carry out the work safely. The building owner or occupier controls access, and should tell the contractor about hazards such as fragile sheets, plant, asbestos and live services on the roof. On projects with more than one contractor there are further duties for clients and for principal designers and contractors.

Before work starts, ask for a method statement and a risk assessment written for your roof, not a generic sheet. Check that the edge protection described fits the edges you can see from the ground, including any low parapets, and that there is a plan for rooflights and openings. Ask what happens if the weather turns, since wind can make some systems unsuitable.

Think about the people below as well. Exclusion zones on the ground stop falling tools harming staff and visitors, and our answer on roof repairs while a business is open covers how that is managed. To get a written price, tell us the address, what kind of roof it is and how people reach it. We will explain the first checks on that roof and the protection it calls for. Our commercial roofing page lists the wider repairs.