Start with the same roof and the same material
Check that both proposals cover the same building and roof sections. A garage, porch or low-slope addition may be included in one and excluded in another. Look for a named roofing product, with the colour confirmed before ordering. For metal, also identify the panel profile and finish. “New roof” is too broad to compare meaningfully.
Check removal, disposal and the supporting work
Look for an explanation of what happens to the old roof and how waste is removed. Then compare the surrounding components: underlay, edges, valleys, flashings and work around roof openings. Identify components being replaced and anything proposed to remain. If other exterior work has been discussed, make sure the written scope matches that conversation.
Find the rule for hidden damage
Not every condition is visible before removal. Ask how damaged decking or another unexpected finding will be recorded and priced, and who must approve additional work. A defined allowance or clearly stated pricing method is easier to understand than an open-ended promise to “repair as required.” Keep approved changes with the original proposal.
Compare the site arrangements and schedule
Discuss access, parking, material delivery, disposal placement and cleanup. Identify practical constraints such as a shared driveway or a tenant who needs notice. An estimated duration should relate to your roof and include a discussion of weather or concealed work. Check how the contractor will communicate a delay or change in sequence.
Read payment and warranty terms separately
Know when payments are due, what each payment relates to and whether tax is included in the stated total. Ask for written workmanship terms and the applicable manufacturer warranty. Those are separate forms of coverage. Clarify who you contact if a problem appears and keep the accepted scope, invoices, product information and warranty documents together.
Decide what the price difference buys
After the scope is aligned, ask each contractor to explain the remaining differences. One may include more replacement flashing, a different material or additional site work. Another may have a different approach to an uncertain item. Choose using the full explanation and your confidence in the proposed work. The lowest total is only useful once you know what it includes.
A homeowner guide from Sun & Snow Roofing. Discuss the conditions and written scope for your particular property before choosing the work.