How to Choose High Level Cleaning Companies

Choosing the right company for high level cleaning is one of those decisions that looks straightforward until something goes wrong. A dropped piece of equipment from 15 metres, an uninsured operative on a cherry picker, or a contractor who lacks the correct certifications can turn a routine maintenance job into a serious incident, a legal headache, or both. The UK’s high level cleaning sector has grown significantly, with the commercial cleaning market valued at over £12 billion in 2025 and specialist access work accounting for an increasing share. Yet the range of operators varies enormously in competence, safety culture, and technical capability. Some firms run lean, highly qualified teams with rigorous safety programmes; others cut corners that only become visible after an accident or a failed audit. This guide breaks down the specific criteria you should evaluate before appointing any contractor for work at height, from accreditations and equipment expertise to insurance, sector experience, and operational transparency. Whether you need warehouse steelwork degreased, an atrium glass canopy restored, or factory extraction ducting cleared of combustible dust, the principles for selecting high level cleaning companies remain consistent: verify credentials, assess competence, and demand documentation.

Essential Industry Accreditations and Safety Standards

Accreditations are your first filter. They do not guarantee excellence, but their absence almost always signals risk. A credible contractor should hold multiple recognised certifications that correspond to the specific type of access work they perform. Requesting copies of these certificates before any site visit is standard practice, not an inconvenience.

Verifying IPAF and PASMA Certifications

IPAF (International Powered Access Federation) certification confirms that operators have been trained to safely use mobile elevating work platforms. PASMA (Prefabricated Access Suppliers’ and Manufacturers’ Association) covers the assembly and use of mobile access towers. Both certifications require regular renewal, so always check expiry dates rather than simply accepting that a company “has” them.

A company that holds both IPAF and PASMA credentials demonstrates versatility: they can work from powered platforms on large external facades and from scaffold towers in tighter internal spaces. Ask for individual operative cards, not just a company-level claim. The card system exists precisely so clients can verify that the person arriving on site is the person who completed the training.

IRATA Qualifications for Rope Access Works

For buildings where platforms and towers cannot reach, or where the cost of scaffolding would be disproportionate, rope access is the preferred method. IRATA (Industrial Rope Access Trade Association) operates a three-tier technician grading system. Level 1 technicians work under direct supervision, Level 2 operatives can supervise small teams, and Level 3 technicians manage complex projects and carry out rescues.

Any company offering rope access cleaning should employ at least one Level 3 technician on every job. This is not just best practice: it is an IRATA requirement. Ask the contractor what level their operatives hold and whether they can provide proof of current membership.

SafeContractor and CHAS Compliance

SafeContractor and CHAS (Contractors Health and Safety Assessment Scheme) are third-party audit programmes that verify a company’s health and safety management systems. They examine policies, risk assessments, training records, and incident histories. A company holding both has subjected itself to external scrutiny beyond what the law strictly requires.

These accreditations matter particularly if you manage a multi-site portfolio or work within a supply chain that mandates pre-qualification. Many facilities managers now require SafeContractor or CHAS membership as a minimum threshold before a contractor can even tender for work.

Evaluating Specialist Access Equipment Expertise

The right equipment determines both the quality of the clean and the safety of the operation. A company that owns and maintains its own fleet of specialist access equipment is generally preferable to one that hires everything in: ownership signals investment, familiarity, and regular maintenance schedules.

Proficiency in MEWP and Spider Lift Operation

MEWPs (Mobile Elevating Work Platforms) include boom lifts, scissor lifts, and truck-mounted platforms. Spider lifts are compact, tracked machines that can pass through standard doorways and operate on uneven ground, making them ideal for internal atrium work or confined courtyards.

Ask prospective contractors which machines they own versus hire. A company with its own spider lift fleet has likely completed hundreds of internal high level jobs and understands the practical challenges: floor loading limits, surface protection, and manoeuvrability in occupied buildings. Hired equipment often arrives without the same level of familiarity from the operators.

Utilising Long-Reach Carbon Fibre Pole Systems

Not every high level job requires a platform or harness. Carbon fibre pole systems, sometimes reaching 20 metres or more, allow operatives to clean windows, cladding, and soffits from ground level. This approach eliminates the need for expensive access equipment on suitable jobs and dramatically reduces risk.

The best companies deploy pole systems with purified water fed through the poles, leaving surfaces spot-free without chemical residues. Ask whether the company uses this method and at what heights they consider it appropriate. A contractor who defaults to expensive platform hire for every job, regardless of the task, may be inflating costs unnecessarily.

Assessing Risk Management and Insurance Coverage

A contractor’s approach to risk management reveals more about their professionalism than almost any other factor. Proper documentation protects both parties and demonstrates that the company takes its legal obligations seriously.

Site-Specific RAMS Documentation

RAMS (Risk Assessments and Method Statements) should be prepared specifically for your site, not recycled from a generic template. A credible contractor will want to conduct a site survey before producing RAMS, because every location presents unique hazards: overhead services, fragile surfaces, public access routes, and operational machinery.

Review the RAMS before work begins. They should identify specific risks at your premises, detail the control measures for each, and outline emergency procedures including rescue plans for work at height. Generic documents that could apply to any building are a red flag.

Public and Employers Liability Requirements

Minimum insurance thresholds vary by sector, but for high level work you should expect at least £5 million in public liability cover and £10 million in employers’ liability. Some clients, particularly in the industrial sector, require £10 million public liability as standard.

Request certificates of insurance directly from the insurer or broker, not just from the contractor. Confirm that the policy specifically covers work at height and the types of access equipment being used. A policy that excludes rope access, for example, is worthless if that is the method being deployed on your building.

Sector-Specific Experience and Technical Knowledge

High level cleaning in a modern office atrium bears little resemblance to the same task inside a steel foundry. The environmental conditions, contamination types, and safety considerations differ enormously, and your chosen contractor needs demonstrable experience in your specific sector.

Industrial Warehouse and Factory Environments

Industrial facilities present hazards that commercial buildings do not: combustible dust accumulation on structural steelwork and cable trays, chemical residues on extraction systems, extreme temperatures, and the presence of operational machinery. Dust that settles on elevated surfaces like beams and ducting is easily overlooked, yet it represents a genuine explosion risk. A small disturbance can suspend accumulated dust into the air, and if an ignition source is present, the consequences can be catastrophic, as incidents like the 2008 Imperial Sugar refinery explosion demonstrated.

Contractors working in these environments should understand dust hazard classifications and operate within appropriate safety frameworks. They should also hold relevant permits to work in areas where explosive atmospheres may be present.

Atrium and Commercial Building Challenges

Atriums, shopping centres, and commercial lobbies demand a different skill set. The primary challenges are working above occupied spaces, protecting finished surfaces, and completing the job with minimal disruption to building users. Glass canopies, suspended light fittings, and architectural metalwork all require careful handling.

Look for companies that have completed similar projects and can provide case studies or client references from commercial property managers. The ability to coordinate with building management teams and work within strict access windows is just as important as technical cleaning competence.

Reviewing Operational Transparency and Reporting

The job is not finished when the operatives leave site. Professional high level cleaning companies provide documentation that proves the work was completed to the agreed standard and gives you an audit trail for compliance purposes.

Post-Clean Photographic Evidence and Audits

Before-and-after photography should be standard on every high level cleaning project. Images taken from the working platform or rope access position provide evidence that areas invisible from ground level have been properly cleaned. This is particularly important for insurance, health and safety audits, and regulatory inspections.

Some contractors also provide written reports detailing any defects or maintenance issues observed during the clean: cracked seals, corroded fixings, blocked gutters. This added value can save you significant money by identifying problems before they escalate.

Out-of-Hours Scheduling and Minimal Disruption

Many facilities cannot accommodate cleaning work during normal operating hours. Retail environments, food production plants, and occupied office buildings often require out-of-hours or weekend scheduling. A contractor’s willingness and ability to work flexibly is a practical consideration that directly affects your operations.

Ask about shift patterns, noise levels from equipment, and how the team manages waste removal. The best contractors plan their logistics so that when your staff arrive the next morning, there is no trace of the work beyond the results.

Making the Right Choice for Your Facility

Selecting the right specialist cleaning partner comes down to verifiable evidence rather than promises. Check accreditations against issuing bodies, review site-specific RAMS before work starts, confirm insurance covers the actual methods being used, and prioritise contractors with proven experience in your sector. The difference between a competent operator and a cheap one often only becomes apparent after an incident, and by then the cost has multiplied far beyond what you saved on the quote.

If you are unsure whether your premises has specific compliance concerns, particularly around dust accumulation or hard-to-reach areas, a professional site assessment can identify issues before they become problems. Our specialists can visit your facility, highlight any safety or compliance risks, and recommend the most effective approach at no cost. Book a free site assessment to get started.