Roof Replacement Cost in Knoxville
Roofs are priced by the square, not the house. Here is what a square costs, and the four things that decide how many you need.
What is a roofing square, and why does it decide the price?
Roofers price in squares because that is how material ships and how labor gets estimated. A common Knoxville ranch might be 20 to 25 squares. Once you know roughly how many squares you have, the per-square figures below turn a vague worry into a range you can plan around.
These are national market ranges, not our price. Pitch, layers, decking condition and material choice are what move a specific roof inside them.
What does each roofing material cost?
| Material | Typical market range |
|---|---|
| Asphalt shingle, installedThe default in East Tennessee | $3 to $5 / sq ft |
| Asphalt shingle, typical home totalStandard 3-tab composition | $5,700 to $12,000 |
| Metal roofing, installedWide span across profiles and gauges | $4 to $30 / sq ft |
| Roofing material only, asphaltPer square, which is 100 sq ft | $80 to $250 |
Asphalt replacement runs $5,700 to $12,000 on a typical home nationally, per the Angi and HomeGuide 2026 cost guides. Those are national market ranges rather than our price. A specific estimate comes from measuring your roof.
What actually moves the number
- Pitch. A walkable roof and a steep one are different labor entirely. Past a certain pitch the crew needs staging and fall protection, production slows, and the same square footage costs more to cover.
- Layers. Tearing off one layer is routine. Tearing off two or three doubles or triples the disposal and the labor before a single new shingle goes down.
- What the tear-off finds. Soft decking, rotted fascia and failed flashing are not visible from the ground and are common on East Tennessee roofs that have taken a decade of humidity. Honest bids carry a decking allowance rather than pretending the deck is perfect.
- Complexity. Valleys, dormers, chimneys, skylights and multiple roof planes all add cut time and flashing detail. Two roofs with identical square footage can differ substantially on complexity alone.
How much of the price is labor and how much is material?
The table above answers this if you read two rows against each other. Asphalt shingles alone run roughly $80 to $250 per square, and a square is 100 square feet. Installed, the same roof runs about $3 to $5 per square foot, which is $300 to $500 a square. So on a typical asphalt job the shingles themselves are somewhere between a quarter and half of what you pay, and the rest is labor, underlayment, flashing, fasteners, disposal of the old roof, and the crew's time on a surface nobody should be walking on without training.
That split is why two bids on the same house can be hundreds of dollars apart on material and thousands apart in total. It is also why the cheapest bid is usually cheap somewhere you cannot see from the driveway: fewer flashing details replaced, no decking allowance written in, one layer torn off instead of two, or disposal quietly left off the sheet.
- Material. Shingles or panels, underlayment, ridge and starter, and the flashing that goes at every chimney, valley and penetration. Ask what grade of shingle and what underlayment, because both move the number and both change how long the roof lasts.
- Labor. Tear-off, decking checks and repair, install, and the fall protection a steep roof requires. This is the half that a low bid usually cuts, and it is the half that decides whether the roof leaks in five years.
- Disposal. An old asphalt roof is heavy, and it goes in a dumpster that has to be delivered, filled and hauled. Two layers doubles it before a single new shingle goes down.
- The unknown. What the tear-off finds under the old roof. Nobody knows this from the ground, which is why an honest number carries a decking allowance instead of a promise.
None of the figures on this page are our price. They are national market ranges from the 2026 Angi and HomeGuide cost guides, and they exist so you can walk into a conversation about your own roof knowing roughly where it should land. The measurement of your actual roof is what turns a range into a number, and that measurement is free. Before you line bids up against each other, how to choose a roofing contractor covers what a real estimate itemizes and what Tennessee licensing actually requires, and the replacement timeline covers what you are buying day by day.
Cost questions, answered
What is a roofing square?
100 square feet of roof surface. Material ships by the square and labor is estimated by the square, which is why roofers price that way instead of by the house.
Is metal worth the premium over asphalt?
Metal runs $4 to $30 per square foot against asphalt's $3 to $5 installed, per the 2026 national cost guides. The case for metal is service life rather than up-front price.
Why do bids on the same roof differ?
Usually tear-off scope, decking allowance and flashing detail rather than the shingle itself. Ask each bid what happens when the tear-off finds bad decking, and the bids become comparable.
Will insurance cover a storm-damaged roof?
Storm damage claims are common in this region. Coverage depends on your policy and the adjuster's finding, so it is worth documenting the damage before any work begins.