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How much does a roof replacement cost in Thunder Bay, ON?

Converted from US national rangeUpdated Prices checked October 20262 sources

A roof replacement costs about CA$10,540 to CA$19,680, typical CA$14,050, using the US national range converted to Canadian dollars. That is Fixr's US figure ($7,500 to $14,000) at 1.4054 CAD per USD (Bank of Canada, October 20, 2026), not a survey of Thunder Bay prices.

Converted to Canadian dollars

Low
CA$10,540
Typical
CA$14,050
High
CA$19,680

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Roof replacement cost in Thunder Bay, ON

Each row says exactly what the figures are and where they come from.

Roof replacement cost in Thunder Bay, ON
EstimateLowTypicalHighBasisChecked
Converted to CADCA$10,540CA$14,050CA$19,680US national range × 1.4054 CAD per USD (Bank of Canada, October 20, 2026). Not a survey of Thunder Bay pricesOctober 2026
US national range$7,500$10,000$14,000Per project: asphalt shingles on a 1,700 sq ft home (about 2,000 sq ft of roof) (Fixr)October 2026

Roof replacement cost by type or size

US national figures in USD, as published by each source.

Roof replacement cost by type or size
Type or sizePrice (USD)Source
Slate roof$20,000 to $60,000Fixr
Copper roof$30,000 to $60,000Fixr

What drives the cost of a roof replacement

Dollar figures in this section are US national figures in US dollars.

  1. Roof size

    Contractors price by the square foot, about $3.75 to $11 and $4.75 on average.

  2. Material

    Asphalt shingles average about $10,000; slate and copper run $20,000 to $60,000.

  3. Pitch and shape

    Hips, valleys, dormers and steep pitches add labor; a steep pitch can add $1,000 to $3,000.

  4. Tear-off and disposal

    Removal averages about $50 per square (100 sq ft), up to $150 for heavy materials.

  5. Decking repairs

    Rotten or damaged decking found during tear-off costs $2 to $8 per sq ft to replace.

  6. Local labor and code

    Labor is roughly 40% to 60% of the total; fire-, wind- or impact-rated codes can add more.

Permits and what's included in Thunder Bay

Fees quoted here are US figures in US dollars; Canadian permit fees are set by your municipality.

Permit note

Re-roofing usually needs a building permit. Permits typically cost $100 to $500, and strict fire-, wind- or impact-resistance codes can add more in some areas.

Rules are set locally; confirm with Thunder Bay’s building department.

What’s usually included

  • Removal of the old roof
  • Underlayment and standard roofing felt
  • Installation of the new roof covering
  • Manufacturer and workmanship warranties (terms vary by contractor)

Scopes vary. Get the scope in writing on every quote.

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Top-ranked roofers in Thunder Bay

The top 3 of 13 roofers we rank for Thunder Bay, ON, by CR Score. Paid placement never changes rank.

  1. #1
    Thunder Bay Roofing Ltd.
    CR Score 644.8from 29 Google reviews
  2. #2
    Strasser & Lang
    CR Score 624.8from 79 Google reviews
  3. #3
    Reno Bros
    CR Score 604.3from 12 Google reviews

See all ranked roofers in Thunder Bay

Roof replacement cost in Thunder Bay: questions

How much does a roof replacement cost in Thunder Bay, ON?

A roof replacement costs about CA$10,540 to CA$19,680, typical CA$14,050, using the US national range converted to Canadian dollars. That is Fixr's US figure ($7,500 to $14,000) at 1.4054 CAD per USD (Bank of Canada, October 20, 2026), not a survey of Thunder Bay prices.

Are these prices in Canadian dollars?

Yes, converted. We have no Canadian price survey for this job, so we show the US national range converted at 1.4054 CAD per USD (Bank of Canada daily rate for October 20, 2026). Local labour, material and tax differences are not reflected.

Do I need a permit for a roof replacement in Thunder Bay?

Re-roofing usually needs a building permit. Permits typically cost $100 to $500, and strict fire-, wind- or impact-resistance codes can add more in some areas. Rules are set locally, so confirm with Thunder Bay’s building department. Dollar figures here are US figures in US dollars.

What affects the cost of a roof replacement?

Roof size: contractors price by the square foot, about $3.75 to $11 and $4.75 on average. Material: asphalt shingles average about $10,000; slate and copper run $20,000 to $60,000. Pitch and shape: hips, valleys, dormers and steep pitches add labor; a steep pitch can add $1,000 to $3,000. Tear-off and disposal: removal averages about $50 per square (100 sq ft), up to $150 for heavy materials. Dollar figures here are US figures in US dollars.

How many roofers serve Thunder Bay?

We rank 13 roofers for Thunder Bay, ON by CR Score. Get at least three written quotes for the same scope.

What is usually included in the price?

Removal of the old roof; Underlayment and standard roofing felt; Installation of the new roof covering; Manufacturer and workmanship warranties (terms vary by contractor). Always get the scope in writing on the quote.

Sources

Checked October 2026. Figures are estimates, not quotes.

  1. Fixr: Roof replacement cost · page updated February 4, 2026 · checked October 2026Primary source. Used for: Low, typical and high; basis; drivers; permit.
  2. HomeAdvisor: Roof replacement cost · page updated June 17, 2026 · checked October 2026Used for: Cross-check: normal range $5,903 to $13,378, average $9,609 (customer-reported projects); pitch driver.
  3. Bank of Canada: Daily exchange rates (USD/CAD) · page updated October 20, 2026Used for: Conversion rate 1.4054 CAD per USD.
These are published estimates converted at a stated exchange rate, checked October 2026. They are not quotes. Typical range shown: CA$10,540 to CA$19,680. Editorial policy

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