Roofing Quote Comparison: Match Scope Before Price

Roofing Quote Comparison: Match Scope Before Price

Quick answer

Compare roofing quotes only after making their scope equivalent. Put each bidder’s tear-off layers, deck repair allowance, underlayment, ice protection, flashing, ventilation, shingles, fasteners, disposal, permits, property protection, warranty, tax, and schedule into the same table. Mark every blank as a question, not as included work. Ask for revised written estimates rather than relying on verbal answers. Choose on verified scope, qualifications, and total risk—not the lowest headline price alone.

D.S Roofing / toiture ds

GatineauOutaouaisQuébec

39 Rue de Bécancour, Gatineau, QC J8P 7X5, Canada

Start with one project brief

Give every roofer the same address, roof areas, known leak history, attic concerns, desired material class, accessory work, access constraints, and target timing. Share the same photos and inspection information without telling bidders what another company priced.

Ask each contractor to inspect before quoting. Roof pitch, height, layers, deck condition, flashing details, penetrations, disposal access, and neighbouring property can materially change labour and material needs.

Ontario consumer guidance recommends at least three written estimates and says they should describe the work and itemize products, services, and prices. A consistent brief makes those estimates easier to compare.

Toiture TNT / Gatineau Outaouais / avis sur toiture tnt / gatineau outaouais

GatineauOutaouaisQuébec

1700 Rue Schryer, Gatineau, QC J8R 1S2, Canada

Compare tear-off and deck work

Record how many roofing layers are included for removal, what happens to old underlayment and nails, and whether disposal and dump fees are included. Confirm whether the quote assumes a complete tear-off or an overlay.

Roof deck damage is often hidden until materials are removed. Ask for the included quantity, unit price, and approval process for plywood or board replacement. Define how the contractor will document damage before proceeding.

A quote with no deck allowance may appear lower but create an open-ended change later. Compare a realistic example total using the same hypothetical repair quantity for every bidder.

Line up the roofing system

Do not compare only the shingle brand. List the manufacturer, product line, colour, underlayment, ice-and-water membrane locations, starter course, ridge cap, fastener type, flashing approach, valley method, vents, sealants, and ventilation changes.

Ask whether existing step, wall, chimney, skylight, plumbing, and valley flashing will be reused, repaired, or replaced. Identify any masonry, carpentry, skylight, gutter, or electrical work that requires another trade.

Check that the proposed system fits the roof design, local code and permit requirements, and manufacturer installation instructions. A premium shingle does not compensate for missing accessories or an unsuitable ventilation plan.

Find allowances and exclusions

Highlight words such as “allowance,” “if required,” “by owner,” “extra,” “TBD,” and “not included.” Ask for a unit price or fixed method wherever the final quantity cannot be known.

Common variables include deck repair, multiple tear-off layers, steep-slope charges, chimney work, rotten fascia, ventilation changes, permit fees, delivery access, parking, crane or lift use, and winter protection.

Confirm taxes and payment milestones. Compare the amount due at signing, material delivery, dry-in, substantial completion, and final walkthrough. A lower subtotal can become a higher total when taxes, disposal, or required accessories are added.

Compare protection and cleanup

Write down how each contractor will protect siding, windows, air conditioners, decks, gardens, pools, driveways, and neighbouring property. Include where materials, bins, and vehicles will go and how interior items will be protected from vibration and dust.

Define daily cleanup, final debris removal, magnetic nail pickup, gutter clearing, and who pays for damage. Ask how weather exposure will be prevented if the roof is opened and work stops.

Ontario’s roofer guidance specifically recommends contract terms for gardens and landscaping, cleanup, and responsibility for possible damage to the property or a neighbour’s property.

Turn the selected quote into a contract

After questions are answered, request a dated revised estimate. Make that estimate an attachment to the contract and resolve any conflict between documents.

Ontario says renovation contracts worth more than $50 must be in writing. Include business details, scope, materials, total cost and taxes, payment schedule, project dates, delays, subcontractors, warranties, cleanup, and change-order procedure.

Ontario consumer guidance also states that when an estimate is included in the contract, the final price for the covered goods and services generally cannot exceed it by more than 10% unless new or different work or a new price is agreed to and the contract is changed. Get project-specific legal advice when a dispute arises.

Limitations and important notes

A spreadsheet improves comparison but cannot determine roof condition, contractor competence, or legal compliance. Verify references, insurance, WSIB status where applicable, permits, and manufacturer credentials independently.

Prices and building requirements vary by home and municipality. Do not use another homeowner’s quote as a substitute for an inspection of your roof.

Sources and evidence notes

The contract and estimate principles here follow Ontario consumer guidance. Confirm current provincial and municipal requirements before signing.

• Government of Ontario: Hiring a Roofer
• Government of Ontario: Renovation and Repair Rights
• Government of Ontario: Guide for Renovation and Roofing Businesses

Frequently asked questions

Why are two quotes for the same roof far apart?

They may assume different removal, deck repair, accessories, labour, protection, warranties, or exclusions. Build a line-by-line comparison before judging price.

Should I tell contractors the other bids?

Give each contractor the same project brief. You can ask for clarification or revision without disclosing a competitor’s confidential price.

What if deck damage cannot be priced in advance?

Set an included allowance or unit price, require photos, and define written approval before work exceeds it.

Is cleanup automatically included?

Do not assume it. Specify bins, haul-away, daily cleanup, nail pickup, gutters, and final inspection in writing.

Can a verbal promise fill a blank quote?

Ask for the answer in a revised estimate and contract. Written, aligned documents are easier to administer.

Next steps

Create columns for every scope item, then enter each quote exactly as written. Mark blanks and conditional language. Send one consolidated question list to each bidder and request revised estimates. Verify credentials and references, compare normalized totals and risks, and attach the complete selected scope to a written contract before paying a deposit or scheduling delivery.