Scaffolding, safety netting and access: what affects roofing project costs?
One roofing quotation includes scaffold and internal safety netting. Another lists a MEWP allowance. The totals differ, but that does not establish that either contractor has priced the same access problem.
Commercial roofing access costs depend on the required working arrangement, building geometry, ground and internal conditions, duration and installation sequence. Scaffolds, MEWPs and safety nets perform different functions; they are not interchangeable items to remove until a quotation reaches a preferred price.
The client needs to understand what the allowance achieves and what assumptions the site must satisfy.
Separate reaching the work from protecting the work
Ask the contractor to explain the purpose of each element. Access for people, lifting of materials, edge protection and measures for work near fragile surfaces may require different provisions.
A safety net intended to arrest a fall should not be assumed to act as weather protection or to contain every small item. A MEWP providing access to one location is not proof that the entire roof can be worked on safely from it.
HSE's fragile surfaces guidance explains the need for suitable planned precautions. The project team must select the arrangement for the actual task, rather than the client selecting equipment by price alone.
Give suppliers a site brief they can price
Provide building height, elevations, roof layout and known access restrictions. Include internal photographs taken safely, floor plans where available, and details of fixed machinery or racking beneath the work.
For external access, explain gates, vehicle routes, loading areas, nearby buildings and any restrictions on using neighbouring land. Identify known overhead or underground services for the project team to assess.
Where dimensions or ground conditions are not known, label them as unresolved. Do not enter a convenient measurement merely to obtain a firm looking quote.
Compare the full access allowance
| Cost heading | Question to resolve |
|---|---|
| Design and planning | What arrangement is proposed and what design or specialist input is included? |
| Delivery and collection | Which transport movements, unloading arrangements and access assumptions apply? |
| Installation and removal | Who erects, installs, alters and dismantles the required equipment or protection? |
| Hire duration | Which dates or period are allowed, and what happens if the roofing sequence changes? |
| Inspections and control | Who undertakes the required checks and manages alterations or restrictions? |
| Movement between phases | Are relocations, changes in working height or additional visits included? |
| Client provisions | What clearance, permits, ground preparation, power or access must the client provide? |
| Other protection | What weather, debris or operational controls are separate from the access equipment? |
Not every row applies to every project. The purpose is to make the included arrangement and the retained responsibilities visible.
Scaffolding: identify the configuration, not just the length
Ask which elevations and working levels are included, what loading the arrangement is intended for and how people and materials reach the work. Any relevant ties, openings, loading positions and protective coverings need to be addressed through the design.
HSE's scaffolding guidance distinguishes standard configurations from scaffolds requiring bespoke design and sets out inspection responsibilities. A quotation should relate to an identified arrangement rather than leave these matters assumed.
If another contractor supplies the scaffold, obtain agreement that it suits the roofing scope and sequence. “Scaffold by client” does not demonstrate that the client has ordered the correct configuration.
MEWPs: explain the actual route and working position
For a mobile elevating work platform, the competent provider needs the working height and reach, but also the route into position, surface conditions and obstructions. Indoor access may be constrained by doorways, aisles, equipment and available turning space.
Ask who confirms machine suitability and the relevant operating and emergency arrangements. Include any restrictions on noise, emissions or operation inside the building in the brief.
Do not assume a taller machine resolves every reach problem. The proposed position, load and manufacturer's operating limits must be assessed for the task. An inexpensive hire rate is not a saving if the machine cannot reach the work from an acceptable location.
Safety netting: include installation access and sequencing
Ask which roof zones the netting covers, how the specialist will access them and how it relates to the roofing work above. Identify any obstructions affecting installation or removal.
The scope should explain the netting specialist's responsibilities and the handover or inspection records required. The roofing contractor and specialist must coordinate when the arrangement is needed and when it may be removed.
If the building must remain operational, record which internal areas must be cleared for installation as well as for the roofing work. These may be separate periods in the programme, and both need to be feasible for the client.
Hire periods should follow the programme
Compare the assumed start, installation duration, working period, phase changes and removal date. A short allowance may exclude time needed for preceding or following work.
For an illustrative example, netting may need to be installed before the roofing team starts and remain until the relevant overhead work is complete. Pricing only the roof installation days would not describe that complete sequence.
Ask what events authorise removal. Do not arrange collection merely because one trade has finished if another still relies on the protection or access. Record responsibility for confirming that it is no longer required.
Challenge duplication and gaps, not safety requirements
A coordinated review can identify overlapping allowances or equipment that does not suit the chosen sequence. It can also reveal missing visits or a client provision that has not been arranged.
The useful cost question is: “Can the same safe result be delivered through a better coordinated arrangement?” It is not: “Which protective measure can we delete?”
Need commercial access planned with your roof works? Send TCR the site layout and proposed roofing scope, or review our commercial scaffolding and safety netting service. Include working height, internal restrictions, delivery access and programme so the complete arrangement can be assessed.
