Avoiding Work at Height on Building Inspections: The Practical Guide

The Work at Height Regulations 2005

The Work at Height Regulations 2005 apply to all work at height where there is a risk of a fall liable to cause personal injury. 'Work' includes inspection, survey, and assessment activities.

The regulations establish a clear hierarchy. Step 1: avoid work at height wherever possible. Step 2: where it cannot be avoided, prevent falls using platforms, guardrails and scaffolds. Step 3: where falls cannot be prevented, minimise the distance and consequences. The hierarchy is not advisory. It is a legal requirement.

Where the exposure sits for property teams

The duty under the regulations does not only apply to the contractor doing the climbing. It applies to anyone who commissions the work. If you instruct a roofing contractor to inspect your flat roof, and someone is injured during the access, the question will be: could this inspection have been completed without working at height?

Property managers and building owners have duties as clients under the CDM Regulations 2015 to ensure that work is planned and managed to minimise health and safety risks. Commissioning routine working at height for inspection purposes, when a safer alternative exists, is increasingly difficult to justify.

The cost of access

Scaffold hire for a flat roof inspection on a four-storey block can cost £2,000 to £8,000 depending on building size and access constraints. For a portfolio of 50 buildings, the access cost alone can exceed £100,000 before the surveyor has assessed a single defect.

MEWP hire is cheaper but limited by hard standing, ground conditions and reach. Rope access is specialist and still at height. Each access event creates a new risk window. Reducing the number of access events directly reduces the number of opportunities for something to go wrong.

What drone-captured inspection changes

A drone captures the same building elements from the same perspectives without anyone accessing the roof or facade. Complete roof coverage from above. Complete facade coverage from standoff. Thermal assessment without roof access. Drainage and gutter inspection from a safe distance.

For inspection purposes, this is the avoid option the regulations ask for first.

When drone inspection replaces access entirely

For the following activities, drone capture eliminates working at height in the majority of cases: routine condition assessment of flat roofs, facade condition surveys on buildings of any height, pre-acquisition building surveys, annual or biannual portfolio condition sweeps, thermal performance surveys, post-storm damage assessment, insurance claim evidence gathering, and evidence gathering for contractor scoping.

When access is still necessary

We do not claim that drone inspection eliminates all working at height. Physical testing, such as membrane adhesion tests or core samples, requires someone on the roof. Detailed inspection of concealed areas beneath plant equipment or inside gutter channels may require physical access. Repair and maintenance work itself still requires a person.

The practical impact is this: drone inspection replaces the investigative and assessment access events, which are the most frequent and least well-defined. The remaining access events are for specific, scoped repair work where working at height is justified.

The numbers on a typical portfolio

Consider a managed portfolio of 80 buildings, each requiring an external condition assessment every two years. The traditional approach: 80 working-at-height events for inspection alone, with estimated access costs of £160,000 to £640,000 over two years.

The drone-captured approach: zero working-at-height events for inspection. Any repairs identified may require access, but the scope is defined. The reduction is not marginal. It is structural.

Regulatory alignment

Using drone-captured inspection to avoid working at height is the straightforward application of step 1 of the hierarchy. The CAA has explicitly stated that building inspections are a primary use case for drone technology.

For housing associations, this alignment is particularly relevant. The Regulator of Social Housing expects proactive asset management. The Building Safety Act requires evidence-based condition records. And the Work at Height Regulations require avoidance wherever possible. A systematic drone inspection programme satisfies all three simultaneously.