Worked examples: comparing commercial roofing quotes
These are worked examples of the comparison method used across this site, set on three common kinds of commercial roof. They are not accounts of real jobs, buildings or clients, and they contain no prices: the point is the questions, which you can apply to the quotes you hold. Commercial Roofing Quotes is a publisher and does not carry out roofing work.
The three examples
- Three quotes for one warehouse roof: a coating, an over-sheet and a full re-clad for the same profiled-metal roof, and how to tell which scope fits the fault.
- A school flat roof re-roof: what a warm-deck re-roof quote should contain when the building stays open, the insulation upgrade applies and the bid may go to the Condition Improvement Fund.
- When the leak is the gutter: comparing a sheet-repair quote, a gutter-lining quote and a re-clad quote for a leak over a production area.
The method in each example
- Read the fault before the price: what is actually failing, and what evidence the roofer has for it.
- Put each quote on the same area and the same items.
- Line them up on the six scope lines: system, falls, insulation and U-value, guarantee, access, exclusions.
- Explain every price gap with a line of scope.
- Check each firm on the registers it claims.
The same steps drive the quote sense-check, which does the arithmetic on your own figures, and the cost guide, which lists the cost drivers in full.
Why there are no case studies with prices here
A case study with a named building and a price tells you what one job cost, on one day, for one scope. Without the survey, the specification and the exclusions behind it, the number cannot be checked or applied to your roof. We would rather show you how to read the quotes you have than publish figures you cannot test.