Flat Roof Replacement cost: Davenport vs Sioux City (2026)
In 2026, flat roof replacement is about 1% more expensive in Davenport than in Sioux City. Most homeowners pay around $9,900 in Davenport versus $9,850 in Sioux City — a gap of roughly $50.
Davenport IA
Typically around $9,900
Sioux City IA
Lower costTypically around $9,850
Davenport vs Sioux City: full breakdown
| Factor | Davenport | Sioux City |
|---|---|---|
| Typical 2026 cost | $9,900 | $9,850 |
| Estimated range | $5,050–$14,700 | $5,050–$14,600 |
| Labor index (vs US) | ×0.93 | ×0.93 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.03 | ×1.03 |
| Local permit | $250 | $250 |
| Labor share | $5,950 | $5,900 |
| Materials/equipment | $3,950 | $3,950 |
These are 2026 planning figures for flat roof replacement, localized to each city — not formal quotes.
Is the price difference a dealbreaker?
1% is within noise for flat roof replacement — contractor selection and timing move the price more than which of these two metros you're in.
Flat roof replacement by type: Davenport vs Sioux City
Below, each flat roof replacement option is priced independently for both cities, with identical local labor, climate and permit logic applied — so the comparison holds up.
| Type | Davenport | Sioux City |
|---|---|---|
| EPDM (rubber) | $5,050–$11,800 | $5,050–$11,700 |
| TPO | $6,000–$12,750 | $6,000–$12,700 |
| PVC | $7,000–$14,700 | $6,950–$14,600 |
| Modified bitumen | $5,050–$10,850 | $5,050–$10,750 |
| Built-up roofing (BUR) | $6,500–$13,700 | $6,450–$13,650 |
Flat roof replacement numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Flat roof replacement by roof size: Davenport vs Sioux City
Flat and low-slope roofs are priced per square (100 sq ft) and run about $3–$11 per sq ft installed, depending on the membrane. The roof area is close to the footprint since there's little pitch.
| Size | Davenport | Sioux City |
|---|---|---|
| 1,000 sq ft (10 squares) | $4,100–$8,450 | $4,050–$8,350 |
| 1,500 sq ft (15 squares) | $5,050–$10,850 | $5,050–$10,750 |
| 2,000 sq ft (20 squares) | $6,000–$13,700 | $6,000–$13,650 |
| 2,500 sq ft (25 squares) | $7,450–$15,650 | $7,400–$15,550 |
| 3,000+ sq ft (30 squares) | $8,900–$18,550 | $8,850–$18,400 |
These are 2026 planning figures for flat roof replacement, localized to each city — not formal quotes.
Cheapest time for flat roof replacement in either city
Shingles seal properly only in warm, dry conditions, which is exactly when everyone else wants a new roof too — especially right after a summer hailstorm. Lock in a late-fall or winter booking for a spring install and you skip that rush.
Where does a smart roofing budget go in 2026?
Roofing budgets swing on decisions most homeowners don't think to ask about — overlay vs. tear-off, shingle tier, deck condition. Our editors break down each one.
The risk case
Budget for the unknown: rotten decking found at tear-off is the most common surprise. Get the per-sheet repair rate in writing up front so a "cheap" bid doesn't balloon mid-job.
The do-it-right case
A full tear-off lets the crew replace underlayment, flashing and ventilation while the deck is exposed — the layers that actually keep water out. Covering old shingles with new ones costs less on install day, but the trapped heat shortens shingle life, and many manufacturers won't honor a warranty on an overlay.
The value case
Architectural shingles hit the sweet spot — far more durable than 3-tab for a modest premium, and far cheaper than metal or tile. For most homes they're the right default.
Full tear-off, architectural shingles and a written deck-repair rate protect you from the two big risks — hidden rot and warranty gaps. The lowest storm-season bid is rarely the cheapest over the roof's life.
Davenport vs Sioux City
Is flat roof replacement cheaper in Davenport or Sioux City?
Sioux City wins on price: flat roof replacement runs about $9,850 there versus $9,900 in Davenport, a gap of roughly $50 (1%) as of 2026.
Why does flat roof replacement cost more in Davenport than Sioux City?
It comes down to labor: Davenport indexes at 0.93 against Sioux City's 0.93. The cold-vs-cold climate difference adds to the gap.
How much is flat roof replacement in Davenport, IA?
Davenport homeowners can expect $5,050 to $14,700 for flat roof replacement in 2026, with $9,900 the typical number.
When is the cheapest time to buy flat roof replacement — and does it differ by city?
No, the seasonal pattern is the same in Davenport and Sioux City: book during Late spring to early fall (dry, 45–85°F) for about 5–10% in savings. Mid-winter and the post-storm rush is the priciest stretch in both cities, mostly due to emergency replacements.
Should I choose where to live based on flat roof replacement cost?
Not really — the $50 gap is one-time, and smart timing and tighter quotes in Davenport can shrink it. Factors that compound over time, like energy prices and home condition, deserve more weight than a single upfront difference.
Compare flat roof replacement in other cities
Updated June 2026 · By Serhat Özçelik