Metal Roof Cost Calculator

How the metal roof cost calculator works

A roofer never prices a metal roof from the size of your house. They price it from the roof surface, in squares (one square is 100 sq ft), and then add the work around the panels. This calculator follows the same order:

1. Roof area. Footprint plus overhangs, times the pitch factor for your slope. A steeper roof has more surface over the same floor plan.
2. Panels installed. Roof area times the installed price per sq ft for the metal type, adjusted for gauge, paint finish, how cut-up the roof is and how steep it is.
3. Prep work. Tear-off and disposal of the old roof, plus any rotten decking sheets.
4. Extras. Snow guards, ice and water shield, a ridge vent and gutter work, priced by the foot of eave or ridge.
5. Your region. Every line is raised or lowered for local labor and material prices.

The installed prices already include underlayment, trim, flashing at walls, and the panel fasteners or clips. They are typical US installed prices, the same ranges we use across FixHomeCost. The likely figure is the middle of the low and high range. Most fair quotes land within 15% of it.

Metal roof cost per square foot by type

The cost of a metal roof per square foot runs from about $7 for basic corrugated steel to more than $30 for copper. Here is how the common types compare on a 2,000 sq ft roof (about 20 squares), before tear-off and extras.

Exposed-fastener panels have a shorter life range because the rubber washers under the screws dry out. Plan on checking and replacing loose or leaking screws every 10 to 20 years. Our metal roof repair guide covers what that involves.

Standing seam metal roof cost vs exposed fastener

Standing seam metal roof cost is higher because the panels hide their fasteners. Each panel is held by clips under a raised seam, so no screw goes through the face of the roof. The panels can also expand and contract with heat without wearing out the screw holes. That is why standing seam lasts longer and is the usual choice for homes.

Exposed-fastener panels (corrugated or ribbed R-panel) screw straight through the metal into the deck or purlins. They go on fast and cost less, which makes them popular for barns, shops and budget homes. The trade-off is hundreds of screw holes that rely on washers to stay dry.

Gauge

Steel thickness is sold by gauge, and a lower number is thicker. 29 gauge is common for exposed-fastener panels on outbuildings. 26 gauge is the residential standard. 24 gauge is stiffer, resists dents and oil canning (visible waviness in flat panels), and costs more. The calculator takes about 5% off the installed price for 29 gauge and adds about 8% for 24 gauge.

Paint finish

SMP (silicone-modified polyester) paint is the standard finish and often carries a 25- to 40-year paint warranty. PVDF, sold as Kynar 500 or Hylar 5000, holds its color and resists chalking much longer. It adds about 6% to the installed price here. In hot, sunny states or with dark colors, PVDF is usually worth it.

Formulas and a worked example

Pitch factor = √(1 + (pitch ÷ 12)²)
Roof area = (length + 2 × overhang) × (width + 2 × overhang) × pitch factor
Panels = area × price per sq ft × gauge × finish × complexity × steep factor
Total = (panels + tear-off + decking + extras) × region factor
Likely cost = (low total + high total) ÷ 2

Worked example (the calculator's default inputs): a 50 × 30 ft house with a 12-inch overhang and a 6/12 gable roof, standing seam steel, 26 gauge, SMP paint, one layer of shingles to tear off, US average prices.

1. Footprint with overhangs: 52 × 32 = 1,664 sq ft.
2. Pitch factor for 6/12: √(1 + 0.25) = 1.118, so roof area = 1,664 × 1.118 = 1,860 sq ft (18.6 squares).
3. Standing seam: 1,860 × $10 to $18 = $18,600 to $33,490.
4. Tear-off, one layer: 1,860 × $1 to $2 = $1,860 to $3,720.
5. Total: $20,500 to $37,200. The likely cost is the middle, about $28,800, or $15.50 per sq ft and $1,550 per square.

Asphalt shingles on the same roof would run about $9,300 to $22,300 with the same tear-off, or $15,800 in the middle. Spread over a 22.5-year middle life, that is about $700 per year of roof. The standing seam roof at $28,800 over a 55-year middle life is about $520 per year.

Metal roof vs shingles cost: which is cheaper?

Up front, shingles win. A metal roof usually costs 1.5 to 3 times as much as an asphalt shingle roof on the same house. Over time, the answer flips for most owners who stay put. Asphalt shingles last 15 to 30 years. Standing seam steel lasts 40 to 70. In the example above you would replace a shingle roof about 2.4 times in the life of one metal roof, and each future reroof will cost more than today.

The bar chart in the calculator divides each roof's likely cost by the middle of its lifespan to get a cost per year. It's a simple measure. It doesn't count inflation, financing or resale value, but it shows the trade-off clearly. Metal tends to come out ahead when:

• You plan to stay 20 years or more.
• You get hail, high wind or wildfire risk. Many metal roofs carry Class A fire and Class 4 impact ratings, and some insurers give a discount for Class 4 roofs. Ask your agent.
• The roof is simple. Long, plain slopes are cheap to cover in metal. Lots of valleys and dormers push the price up faster for metal than for shingles.

If you plan to sell within 10 years, shingles are usually the better buy. Compare both in our roof replacement cost estimator.

What else changes the cost of a metal roof

Tear-off and decking

Removing one layer of shingles runs about $1 to $2 per sq ft, with dump fees included. Each extra layer adds roughly $0.75 to $1.25. Once the old roof is off, the crew checks the plywood or OSB deck. Soft or rotted sheets are replaced at about $70 to $120 per 4 × 8 ft sheet. Ask that this be quoted per sheet so you only pay for what is replaced.

Pitch and complexity

Up to 7/12, crews walk the roof normally. We add 10% at 8/12 to 9/12, 20% at 10/12 to 12/12, and 30% above 12/12 for harnesses, roof jacks and slower work. Valleys, dormers, skylights and chimneys each need custom-cut panels and trim, which is why the complexity setting adds 10% or 20%.

Your region

Extras

• Snow guards: about $5 to $15 per foot of eave for each row. Metal sheds snow all at once, so they protect gutters, walkways and people below.
• Ice and water shield: about $3 to $6 per foot of eave for the usual two courses at the edge, or $0.75 to $1.50 per sq ft for a high-temperature membrane over the whole roof.
• Ridge vent: about $10 to $20 per foot of ridge. Check your attic needs with the roof vent calculator.
• Gutters: $2 to $4 per foot to take off and reinstall, or $5 to $15 per foot for new seamless aluminum. See gutter replacement cost.

Tips for a fair metal roof quote

• Get three quotes on the same spec. Same panel profile, gauge, finish and underlayment. Otherwise you are comparing different roofs.
• Ask who rolls the panels. Many standing seam installers form panels on site from coil. That allows long runs with no end laps, which is better on low slopes.
• Read both warranties. The paint warranty comes from the coil maker. The workmanship warranty comes from the installer, and it matters more for leaks.
• Get decking priced per sheet. A fixed "allowance" can hide a large markup.
• Plan for solar now. Standing seam takes clamp-on solar mounts with no roof holes. Check how many panels fit with our solar roof calculator.
• Check the quote line by line with our quote checker before you sign.

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