The short answer
Ask questions that reveal how the roofer reached the diagnosis, which roof areas were inspected, what remains hidden, what the proposed work is intended to solve and how the home, neighbours and exposed roof will be protected.
The aim is not to interrogate for its own sake. It is to make the scope, assumptions and responsibilities clear before work begins.
- Who is the contracting business?
- What has actually been inspected?
- What is included and excluded?
- How are variations handled?
Ask about diagnosis and inspection limits
A quotation should explain whether the roof was inspected from ground level, ladder, scaffold, internal roof space, photographs or previous reports. Each route has limits.
If a contractor is certain about concealed conditions without explaining the access used, ask what could only be confirmed from scaffold, within the roof space or after controlled opening-up, and how a change in those conditions would be priced and approved.
- Which areas were seen directly?
- Which symptoms are client-reported?
- What could not be inspected?
- What assumptions are built into the quote?
Ask about scope, materials and protection
Clarify the included roof areas, covering system, fixings, leadwork, gutters, rooflights, insulation, waste, scaffold, access, internal protection and temporary weathering. For occupied or high-value homes, ask exactly how exposed areas, interiors, gardens, terraces and neighbour interfaces will be protected.
Ask why the proposed material and detail suit the actual pitch, exposure, substrate and existing roof. For re-covering or insulation work, also ask who is responsible for Building Regulations approval or whether eligible work will be self-certified through a current authorised competent-person scheme.
- Which coverings and junctions are included?
- How will access routes and interiors be protected?
- What material specification is proposed?
- What handover information will be supplied?
Ask about money, variations and handover
Before work starts, understand payment stages, deposits, provisional items, VAT treatment, who may subcontract parts of the work, how variations are authorised and what any workmanship or product guarantee actually covers. Ask for current insurance evidence in the contracting business name and check the relevant activities, policy period and limits rather than relying on a logo or verbal assurance.
Reasons to slow down include pressure to decide immediately, an unclear contracting identity, vague materials or scope, insurance that cannot be evidenced, no written assumptions or variation process, and claims that every hidden condition is known despite limited inspection.
- How are variations agreed before work proceeds?
- What is provisional or excluded?
- Who will supervise and communicate?
- What documents or photographs are provided at completion?
Checklist
Roofer quotation comparison checklist
Use these points to compare like with like before choosing a contractor.
- Registered business name and contact details
- Inspection route and limits
- Included roof areas
- Materials and specification
- Access and scaffold assumptions
- Interior and neighbour protection
- Subcontractor responsibilities
- Current insurance evidence in the contracting business name
- Payment stages and variation process
- Handover documents and photographs
FAQs
Questions before hiring a roofer
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Yes. A written scope helps compare quotations and reduces uncertainty around included areas, assumptions and exclusions.
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Pressure to decide quickly, unclear business identity, unverifiable insurance, no inspection limits, vague materials, unexplained Building Control responsibility or refusal to document variations should prompt more questions before appointment.
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Not by itself. Compare whether the quotations describe the same roof areas, access, materials, protection, waste and uncertainty.
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No careful contractor should promise that all hidden conditions are known before access or opening-up where those limits apply.
Next Steps
Discuss a roofing scope after preparing your questions
Send the property context, suspected issue, photographs and any quotations already received if you want help understanding what should be clarified.