The roof and its condition
Area is only one part of a quotation. Roof type, geometry, existing layers, deck condition and the need for investigation influence the scope.
Access and site arrangements
Scaffolding, lifting, protection, working hours and the need to keep a building operational can affect cost. These should be discussed before comparing prices.
Compare like for like
Check the specification, preparation, disposal, exclusions, programme and any warranty terms. A headline price is less useful than a clear, comparable scope.
This guide is general information. Site-specific decisions require an appropriate assessment and specification.
Questions about planning the work
Can you give a reliable cost from the roof area alone?
Roof area helps size the enquiry but does not define the scope. Existing layers, condition, access, removal, insulation and details can change the work substantially. Provide a survey or specification where available so quotations can be compared on the same basis.
What should a commercial roofing quotation itemise?
Look for the proposed system, preparation, removal and disposal, insulation, flashings, rooflights and drainage. Access, protection, working hours, exclusions, VAT treatment and any provisional sums should also be clear.
How can I prepare an initial project budget?
Gather the roof area, construction, condition reports, site restrictions and target dates. Separate confirmed work from items that need further investigation, and discuss allowances for those uncertainties before committing to the programme.