How Much Does a New Roof Cost in Thunder Bay?
If your roof is nearing the end of its life, the first question is usually the obvious one: what is this going to cost? It is a fair question, and the honest answer is that there is no single number that fits every home. The cost of a new roof in Thunder Bay depends on the size and shape of your roof, the material you choose, and the condition of what is underneath. This guide breaks down the real cost drivers so you can plan with realistic expectations.
One note up front: we give ranges here, not a quote. Every roof is different, and the only way to get an accurate price is an on-site look. When you are ready for that, request a free estimate or run the roof cost calculator for a quick ballpark.
What Drives the Price
Roof Size
Roofing is measured in squares, where one square equals 100 square feet. The bigger your roof, the more material and labour, so size is the largest single factor. A small bungalow might be 12 to 18 squares; a larger two-storey home, 25 squares or more.
Material
This is the biggest choice you control. From most affordable to most expensive, the common options run: 3-tab asphalt shingles, architectural asphalt shingles, then metal. Metal costs more up front but lasts decades longer. Our metal versus asphalt guide compares them in detail.
Roof Complexity and Pitch
A simple gable roof is quicker and cheaper to do than one with multiple hips, valleys, dormers, and levels, which all add labour and custom flashing. Steeper roofs also cost more because of the added safety equipment and time. The split-levels common in County Park and the dormered older homes downtown sit at the more complex end.
What Is Underneath
This is the wildcard, and in Thunder Bay it matters more than most places. Once the old roofing is off, the deck may turn up:
- Rotted decking. Years of ice damming rot the plywood at the eaves and valleys, and it has to be replaced.
- Multiple old layers. Older homes often have two or more layers of shingles to tear off and dispose of.
- Ventilation problems. Correcting the attic ventilation that causes ice dams adds to the job, but it is what makes the new roof last.
The Thunder Bay Factor
A roof here is not just shingles on a deck. To survive our snow load, freeze-thaw, and lake wind, a proper install includes ice-and-water membrane at the eaves and valleys, full underlayment, corrected ventilation, and proper flashing. Those are not upsells, they are what keeps a Northern roof from leaking. A quote that comes in suspiciously low may be skipping them, and that roof will cost you more in the long run. It is worth comparing quotes on what is actually included, not just the bottom-line number.
What a Roof Replacement Includes
A complete roof replacement from us covers:
- Full tear-off of the existing roofing
- Inspection and replacement of any rotted decking
- Ice-and-water membrane at the eaves and valleys
- Synthetic underlayment across the deck
- Your chosen roofing material, properly installed
- Corrected attic ventilation
- New flashing at chimneys, vents, and transitions
- Full cleanup and disposal
Repair vs. Replace
If your roof is young and the problem is isolated, a repair is the cheaper, smarter move. If it is near end of life or leaking in several places, repairs become money down the drain and a replacement is the better value. A roof inspection tells you which situation you are in.
Get a Real Number
Ranges only get you so far. For an accurate price, we will visit your home, measure the roof, inspect the deck and ventilation, and give you a clear written quote with no pressure. Start with the roof cost calculator for a ballpark, then call Sleeping Giant Roofing at (807) 501-9192 or request a free estimate online.