A full roof replacement in Missouri typically costs $8,000–$25,000 for a 2,000-square-foot home, depending on material choice, roof complexity, and whether you're tearing off existing layers or building over them. Asphalt shingles (the most common choice) run $350–$550 per square (100 sq ft) installed, metal roofing costs $700–$1,200 per square, and flat or low-slope systems range from $450–$800 per square.
Those ranges reflect real quotes from licensed Missouri contractors serving Warren, Lincoln, St. Charles, and Franklin counties. The final number depends on pitch, access, tearoff requirements, ventilation upgrades, and whether your insurer is covering storm damage or you're paying out of pocket for a planned upgrade.
What Drives the Cost of a Roof Replacement?
Roof replacement costs aren't arbitrary—they're built from measurable inputs. Understanding what contractors price lets you compare quotes accurately and spot lowball estimates that skip necessary work.
Material Choice
Roofing material is the single largest cost driver. Missouri homeowners choose from:
- Asphalt shingles (3-tab): $90–$150 per square (materials only). Shortest lifespan (15–20 years), minimal wind resistance. Rarely installed on new construction anymore.
- Asphalt shingles (architectural/dimensional): $120–$250 per square. Most common choice. 25–30 year warranty, Class 4 impact ratings available, wind resistance to 110+ mph.
- Metal roofing (standing seam): $400–$700 per square. 40–50 year lifespan, excellent wind and hail resistance, energy-efficient. Higher upfront cost, lower lifetime cost.
- Flat/low-slope systems (TPO, EPDM, modified bitumen): $250–$500 per square. Commercial-grade membranes for low-slope residential applications. Requires professional installation—DIY fails are common.
Roof Size & Complexity
Contractors measure roofs in "squares" (100 square feet). A 2,000-square-foot home typically has 20–24 squares of roof area once you account for pitch and overhangs. Steeper pitch means more material and slower work—a 12/12 pitch roof costs 20–30% more to install than a 4/12 pitch with the same footprint.
Complexity adds labor time: every valley, dormer, chimney, and skylight slows production and increases the risk of leaks if flashing isn't detailed correctly. A simple gable roof on a ranch house costs less per square than a multi-hip Victorian with six dormers and two chimneys.
Tearoff vs. Overlay
Tearoff (removing existing shingles) adds $100–$150 per square in labor and disposal costs, but it's the only way to inspect the deck for rot, ensure proper ventilation, and install a code-compliant underlayment. Most building codes in Missouri allow one layer of shingles over an existing roof, but we don't recommend it—you're covering problems you can't see, shortening the new roof's lifespan, and creating a tearoff nightmare when that layer fails.
Ventilation & Underlayment Upgrades
Missouri's humid summers and freeze-thaw winters demand proper attic ventilation (ridge vent + soffit intake) and a quality underlayment. Synthetic underlayment costs $50–$100 more per square than felt paper, but it won't tear during installation, resists UV exposure during construction delays, and provides better secondary water protection.
Need a Written Roof Estimate?
A&S Contracting Services provides free, no-obligation written estimates for all roofing projects across Warren, St. Charles, Lincoln, and Franklin counties. We'll visit your property, measure the roof, and provide line-item pricing—no surprises.
Call (636) 359-7204How Do I Compare Contractor Estimates?
Not all roof quotes are structured the same way. Some contractors give you a single lump-sum number with no breakdown. Others provide line-item pricing that shows exactly what you're paying for. A detailed estimate lets you compare apples to apples.
Look for these details in every quote:
- Material brand and model: "architectural shingles" isn't enough. Is it Owens Corning Duration, GAF Timberline HDZ, or a builder-grade shingle with a 20-year warranty? Brand and model determine wind rating, impact resistance, and warranty transferability.
- Scope of work: Does the estimate include tearoff, disposal, new underlayment, drip edge, ridge vent, and flashing replacement? Or just "new shingles installed"?
- Warranty coverage: Manufacturer's warranty (material defects) is separate from workmanship warranty (installation errors). A 30-year shingle warranty doesn't cover leaks from improper flashing—that's on the contractor.
- Timeline and payment terms: How long will the job take? What's the deposit requirement? When is final payment due? Avoid contractors who demand full payment upfront or work on a "pay when we're done, no contract" basis.
What About Insurance Claims?
If your roof suffered hail or wind damage, your homeowner's insurance may cover replacement. Contractors can't negotiate with your adjuster on your behalf (that requires a public adjuster license in Missouri), but we can document damage, provide repair estimates, and point out issues the adjuster might miss during their initial inspection.
Insurance typically covers "like kind and quality" replacement—if you had architectural shingles, they'll pay for architectural shingles. Upgrades (impact-resistant shingles, metal roofing, additional ventilation) are out-of-pocket unless your policy specifically covers them.
When Is Repair More Cost-Effective Than Replacement?
Not every roof problem requires a full tearoff. Localized damage—missing shingles, isolated leaks, damaged flashing—can often be repaired if the rest of the roof is sound and you're not approaching the end of its rated lifespan.
A good rule: if repair costs exceed 30% of replacement cost, or if your roof is past 70% of its expected lifespan, replacement is the better long-term investment. Patching a 20-year-old roof with widespread granule loss and curling shingles just delays the inevitable—and you'll pay for both the repair and the replacement within a few years.