Two roof-replacement estimates can look similar on the first page and describe very different projects. One may include replacing worn flashing and improving attic ventilation. Another may price the shingles while leaving those details unresolved.

For homeowners in Park Ridge, Glenview, Des Plaines and nearby Chicagoland communities, the most useful comparison starts with the written scope. Use this checklist to understand what you are buying before comparing the totals.

1. Confirm which roof areas are included

Ask each contractor to identify the house, attached or detached garage, porch and any low-slope sections separately. A proposal should explain whether the existing roofing will be removed, how many layers are included and what happens if additional layers are uncovered.

A small flat section can require a different roofing system from the main shingle roof. Make sure it has an explicit scope instead of assuming the words “complete roof” include every surface.

2. Get a clear plan for damaged decking

The wood beneath the shingles cannot always be fully evaluated before tear-off. Ask how the contractor documents damaged decking, obtains approval and prices replacement. A stated price per sheet or linear foot is easier to evaluate than an open-ended allowance with no explanation.

For example, if one bid includes a decking allowance and another excludes all decking repairs, their headline prices are not directly comparable. Ask both contractors to explain the same scenario in writing.

3. Compare the complete roof system

Record the shingle manufacturer, product line and selected color. Then compare the supporting components: ice and water barrier, underlayment, starter shingles and hip and ridge shingles. Malarkey identifies these as the five components of its Secure Choice roof system. The brand and eligibility of the accessories can matter when comparing enhanced warranties.

Ask where the protective layers will be installed and how valleys, eaves and transitions will be handled. A familiar shingle name alone does not describe the entire installation.

4. Ask what happens at every penetration and wall

Chimneys, plumbing vents, skylights and roof-to-wall intersections deserve their own discussion. Will flashing be replaced or reused? Are aging pipe boots included? If a skylight remains, what work is included around it and what is excluded?

Have the contractor identify any detail that requires siding, masonry or gutter work. That helps avoid discovering halfway through the project that an important transition belongs to a different scope.

5. Make ventilation a project-specific decision

Ask how the attic and existing ventilation will be evaluated, which intake and exhaust components are included, and whether blocked airflow needs correction. “New ridge vent” is not a complete ventilation plan.

Homes with vaulted ceilings, spray foam or other unusual roof assemblies need a specific assessment. Do not assume the same vent arrangement is appropriate for every house.

6. Separate product coverage from workmanship coverage

Request the actual warranty documents and the name of the coverage being offered. Ask who registers it, what installation requirements apply, and which company handles a future claim. An enhanced manufacturer warranty is not automatically included just because a contractor offers that brand.

Malarkey’s enhanced coverage depends on the qualifying roof system and contractor program. Compare the written warranty scope, exclusions and registration requirements rather than the largest number printed in a sales brochure.

7. Clarify the workday and closeout

• Where will materials and the dumpster be placed?

• How will landscaping, driveways and outdoor equipment be protected?

• Who is the contact for questions or unexpected conditions?

• How are changes approved before extra work proceeds?

• What cleanup, final inspection and documentation are included?

Ask who handles any required permits and inspections, and confirm the proposed schedule and weather contingencies. Keep these answers with the estimate so you can compare them later.

Bring the estimates back to the same scope

A useful comparison sheet has three columns: included, excluded and needs clarification. Fill it out for each contractor. Once the scope is aligned, you can weigh price alongside communication, installation details and warranty coverage.

Northwind Exteriors helps homeowners plan residential roof replacements in Park Ridge and surrounding communities. You can also view our roofing project gallery before discussing your home.

Ready for a clearer roof-replacement plan? Schedule a consultation or call (773) 998-4000. Bring your questions about decking, flashing, ventilation and warranty options.

Manufacturer references

Malarkey roof-system and warranty information and certified contractor program. Coverage is governed by the applicable written warranty.