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Corrugated Metal Roof Cost Calculator

Estimate 2026 US corrugated metal roof installation cost by line item: 26-ga galvanized, 26-ga Galvalume, colour-coated PVDF, 24-ga heavy gauge, or polycarbonate, with tear-off, eave bituminous membrane, synthetic underlayment, vented ridge, barge trim, valley flashing, capped side-lap screws, drip edge, permit and disposal. Real 2026 NRCA and MCA contractor rates.

Corrugated Metal Roof Cost Calculator

2026 US corrugated metal roof installation cost by line item — 26-ga galvanized, 26-ga Galvalume, colour-coated PVDF, 24-ga heavy gauge, or corrugated polycarbonate. Includes tear-off, eave bituminous membrane, synthetic underlayment, vented ridge cap, barge trim, valley flashing, capped side-lap screws, drip edge, permit and disposal. Real 2026 NRCA and MCA contractor rates.

Estimated corrugated metal roof cost
$19,975
Range: $16,979 – $23,970
panel + tear-off + eave bitumen + underlay + ridge + barge + valley + fasteners + drip + add-ons
Panel installed
$11,440
Tear-off
$3,630
Eave bitumen
$0
Underlay
$960
Vented ridge
$720
Barge trim
$420
Valley flashing
$520
Fasteners
$1,500
Drip edge
$210

What this calculator estimates

This calculator gives you a line-by-line installed 2026 US price for a corrugated metal roof — whether you are re-roofing a farmhouse, sheltering a barn, replacing a shed roof, putting on a patio cover, or buttoning up an outbuilding. It follows the same line-item structure NRCA and MCA-member roofers use on real quotes:

  • Panel material — 26-ga galvanized G90, 26-ga Galvalume, colour-coated PVDF Kynar 500, 24-ga heavy Galvalume Plus, or polycarbonate (installed)
  • Tear-off — removing the existing shingles, tile, or rusted metal down to the deck or purlins
  • Eave bituminous membrane — self-adhered membrane at eaves and valleys (mainly for solid-deck installations)
  • Synthetic underlayment — on the balance of the deck (skip if open-purlin installation)
  • Vented ridge cap — with profiled foam closure to allow attic ventilation through the corrugations
  • Barge / gable trim, valley flashing, side-lap fastener kit, drip edge — pre-formed flashings and capped screws
  • Permit, disposal, and weekend premium

A $425 minimum service-call floor applies in most US metal roof markets — Tulsa, Lubbock, Lexington, Boise, and Springfield Missouri — because even a single sheet replacement requires a two-person crew with snips, ladder, and a small dumpster.

How to use it

  1. Enter roof area in square feet. For a simple gable barn this is your wall footprint × 1.05 to 1.15. For a typical farmhouse it is 1.10 to 1.35x your living-area footprint due to pitch.
  2. Pick panel material — 26-ga galvanized G90 is the cheapest serviceable choice; 26-ga Galvalume the residential default; colour-coated PVDF if you want a 30-year colour warranty; 24-ga heavy for hail or hurricane areas; polycarbonate for translucent porch and patio cover roofs.
  3. Set scope — spot repair (15% of area), partial replace (45%), or full re-roof (100%).
  4. Set storey count — single-storey 1.0x, two-storey 1.2x, three-storey 1.45x.
  5. Set access difficulty — easy (drive-up) 1.0x, moderate (rear garden) 1.1x, hard (lift required) 1.3x.
  6. Enter eave bituminous membrane area — typically 24 in inboard of eaves plus all valleys for a solid-deck installation. Leave at 0 for open-purlin.
  7. Enter linear feet of ridge, barge trim, valley flashing, side-lap fastener seam, and drip edge. Side-lap seam length is roughly (roof area in sqft) ÷ 2 for 24-inch panels.
  8. Toggle tear-off, permit, disposal, weekend premium and any extra labour hours.

Typical 2026 US corrugated metal roof cost ranges

These ranges reflect 2026 nationwide pricing from the NRCA Cost-of-Roofing Survey, the MCA 2026 Member Survey, HomeAdvisor State-of-Home reports, Angi pricing data, and Q1 2026 quotes from Tulsa, Lubbock, Lexington, Boise, and Springfield Missouri.

Corrugated metal system (2,000 sq ft, single-storey, moderate access)2026 installed price
26-ga galvanized G90, full re-roof with tear-off + synthetic underlay$8,000 – $14,000
26-ga Galvalume, full re-roof$10,000 – $18,000
Colour-coated PVDF Kynar 500 26-ga, full re-roof$16,000 – $25,000
24-ga heavy Galvalume Plus, full re-roof$14,000 – $22,000
Polycarbonate (Suntuf, Tuftex) — porch / patio cover 300 sqft$1,200 – $2,400
Spot panel replacement (15%)$1,800 – $3,500
Re-screw existing panels (replace all EPDM-washer screws)$1.20 – $2.20 per sq ft
Re-flashing only (ridge + barge + valley + drip)$2,500 – $5,500
Open-purlin agricultural install (no deck, no underlay)subtract $1.50 – $3.00 per sq ft

Add 20 percent for two-storey, 45 percent for three-storey or higher. Add 10 to 30 percent for moderate to hard access. Add 8 to 15 percent for the 24-ga heavy gauge over standard 26-ga in the same panel profile.

Cost drivers

Panel material and gauge. 26-ga Galvalume is the volume product. Bare G90 galvanized drops the panel cost about 18 percent. Colour-coated PVDF Kynar 500 adds 50 to 70 percent over bare Galvalume for the resin and bake-finish process. 24-ga heavy adds 35 to 50 percent for the thicker steel and stiffer panel handling.

Panel profile. Standard 7/8-inch corrugation is the residential and agricultural default at 26 to 36 inch coverage width. PBR-panel (purlin bearing rib) is a stiffer profile for open-purlin spans up to 5 ft. R-panel and 5V-crimp are the metal-barn favourites — same cost as standard corrugated. 1.25-inch deep corrugation (Stratco, Fielders) has better water-shedding for low-slope applications but is harder to source in the US — add 10 to 20 percent.

Pitch and complexity. A 4/12 to 8/12 pitch is straightforward. Above 8/12, fall protection slows the crew by 20 to 35 percent. Below 4/12 needs self-adhered bituminous membrane across the whole deck and butyl tape in every side-lap — add 15 to 25 percent. Cut-up roofs with dormers, valleys, and chimney transitions add 20 to 40 percent vs a simple gable.

Tear-off scope. A single layer of asphalt shingle is fast tear-off (the metal sheets themselves are quick to strip). A second layer of shingles, or existing 3-tab over 1x6 boards, is slower. Existing rusted corrugated metal tear-off is the easiest of all — the panels lift off in seconds. Allow $1.65 per sq ft for typical tear-off.

Open-purlin vs solid deck. Open-purlin installation is the agricultural standard and saves $1.50 to $3.00 per sq ft by eliminating the deck and underlayment. The trade-off is noise and condensation if not detailed correctly. Solid-deck is the residential standard.

Coastal corrosion. Within one mile of saltwater, use Galvalume Plus or aluminum panels with stainless screws and PVDF topcoat — bare G90 galvanized rusts within 5 years on the coast. Within 5 miles, use Galvalume with PVDF topcoat and HDG fasteners. Coastal premium adds 10 to 18 percent.

Wind and hail rating. Standard 26-ga corrugated meets ASTM E1592 Class 60 uplift. Class 90 (hurricane rating) requires 24-ga, 12-inch screw spacing on side-laps, and butyl in every lap. Class 4 hail rating (UL 2218) requires 24-ga panels with steel substrate of at least 0.024-inch.

US code, standards, and certifications

  • IRC 2024 R905.10 — Metal roof panel requirements (minimum pitch, fastening, underlayment).
  • ASTM A792 / A792M — Galvalume (55% Al-Zn) sheet standard.
  • ASTM A653 — Galvanized (G90) sheet standard for bare zinc-coated.
  • ASTM E1592 — Structural performance of sheet metal roof panel uplift testing.
  • UL 580 — Uplift resistance test for roof assemblies (Class 30 / 60 / 90).
  • UL 790 / ASTM E108 — Fire test of roof coverings (Class A = highest).
  • UL 2218 — Impact resistance classification (Class 4 = highest, hail-resistant).
  • MCA / NRCA Metal Roof Installation Manuals — Industry-best-practice fastening, sealing, flashing.
  • Florida Product Approval — required for any metal panel in the Florida HVHZ zone.
  • NRCA Roofing Manual: Metal Panel and SPF Roof Systems (2024) — the trade reference for exposed-fastener systems.

Use an MCA-certified or NRCA-member contractor for any residential corrugated project — the trade certifications include workmanship warranty programs and access to the manufacturer’s longer paint and substrate warranties.

Diagnostic step-by-step before quoting

  1. Walk the existing deck before tear-off — pop two attic-access panels and inspect the sheathing. Soft, dark, or delaminating OSB or plywood means the deck becomes part of the job. Add $1.50 to $3.00 per sq ft for partial re-decking.
  2. Verify the existing pitch with a digital level or a pitch app — pitch under 4/12 means whole-deck bituminous membrane and changes the bid.
  3. Inspect existing purlin spacing (if open-purlin) — 24-inch on centre is the residential default for 26-ga. If purlins are at 36-inch or wider, step up to PBR-panel or add intermediate purlins. Allow $1.50 to $3.00 per sq ft for purlin retrofit.
  4. Sample colour at the roof — Kynar 500 PVDF in matte finishes (Slate Grey, Charcoal, Galvalume Plus, Burnished Slate) holds up better in sun than glossy darker colours that fade. Order chip samples and view them at the home morning and afternoon.
  5. Get three MCA-certified or NRCA-member bids that itemize panel, eave membrane, underlay, ridge, barge, valley, screw kit, drip, structural work, permit, and disposal as separate line items. Lump-sum bids hide the real cost drivers.

Avoiding scams and overcharging

Door-knocker roofers often pitch corrugated metal at residential homeowners as a “lifetime” roof — it is not. Corrugated is a 30 to 45 year roof at best, and the EPDM washers under each screw degrade in 12 to 20 years. Red flags include: 29-gauge sold as 26-gauge (insist on the manufacturer’s coil sticker showing the gauge and AZ50 / AZ55 Galvalume coating weight); no MCA or NRCA certification; refusal to itemize the fastener kit separately (a real installer knows exactly how many screws per sheet); no warranty on the EPDM-washer life; and lump-sum pricing without a panel manufacturer’s name (Fabral, Union, McElroy, Metal Sales, ABC, Best Buy Metals, Drexel, ATAS are the legitimate US makers). Reputable corrugated installers in 2026 carry $1M general liability minimum and will gladly share the panel manufacturer’s published installation manual.

Sources: 2026 NRCA Cost-of-Roofing Survey; Metal Construction Association (MCA) 2026 Member Survey; IRC 2024 R905.10; ASTM A792 / A653 / E1592; UL 580 / UL 790 / UL 2218; Florida Product Approval database; HomeAdvisor State-of-Home 2026; Angi pricing data 2026; Q1 2026 quotes from Tulsa, Lubbock, Lexington, Boise, and Springfield Missouri metros.

Frequently asked questions

How much does a corrugated metal roof cost in 2026 in the US?
Most US homeowners and farm owners pay $4 to $9 per sq ft installed for a 26-gauge Galvalume corrugated metal roof in 2026, all-in with tear-off, synthetic underlayment, vented ridge cap, barge trim, valley flashing, capped side-lap screws and disposal. A 2,000 sq ft single-storey re-roof in 26-ga Galvalume lands around $10,000 to $18,000. Bare 26-ga galvanized G90 is $8,000 to $14,000 for the same job. Colour-coated 26-ga PVDF (Kynar 500) is $16,000 to $25,000. Heavier 24-ga Galvalume Plus runs $14,000 to $22,000. Polycarbonate corrugated sheet (Suntuf, Tuftex) for porches, sheds and patio covers is $1,200 to $2,400 for a 300 sq ft job. Source: 2026 NRCA Cost-of-Roofing Survey; Metal Construction Association (MCA) 2026 Member Survey; Q1 2026 quotes from Tulsa, Lubbock, Lexington, Boise, and Springfield MO.
What is the difference between corrugated metal and standing seam?
Corrugated metal is an exposed-fastener panel — screws with EPDM washers penetrate the panel face every 12 to 24 inches into the purlin or deck. Standing seam is a concealed-fastener system where panels lock together along raised vertical seams 1 to 2 inches tall, with no screws visible from the ground. Functionally: corrugated costs 35 to 50 percent less installed, lasts 20 to 35 years before the washers degrade, and is the right product for barns, sheds, agricultural buildings, porches, patio covers, and rural homes on a tight budget. Standing seam costs more, lasts 50 years, qualifies for Class 4 hail and Class A fire ratings, and is the residential premium product. Both use the same Galvalume or PVDF coating chemistry.
How long does a corrugated metal roof last?
26-gauge Galvalume corrugated lasts 30 to 45 years if the EPDM washers under each screw are inspected and replaced as needed every 10 to 15 years. The panel itself can outlast the original fasteners by 20 years — Galvalume coating warranties run 25 to 35 years. Bare G90 galvanized in dry inland climates lasts 25 to 35 years. Colour-coated PVDF (Kynar 500) panels carry 30-year paint warranties from ABC, Best Buy Metals, and McElroy. The two failure modes are washer degradation around fasteners (causing pinhole leaks) and edge corrosion at the cut ends, which is why crimped or sealed eaves are critical. Polycarbonate corrugated has a 10 to 15-year UV warranty and yellows over time.
What is the best gauge for a residential corrugated metal roof?
26-gauge (0.018 inch) is the residential standard and the volume product. It handles foot traffic for cleaning, resists hail up to about 1.5-inch stones, and is the gauge stocked at Home Depot, Lowe's, Tractor Supply, and Menards. 29-gauge (0.014 inch) is the budget agricultural gauge — fine for barns and sheds but dents from ladders and walks too easily for residential use. 24-gauge Galvalume Plus (0.024 inch) is the heavy gauge for hurricane zones (Florida, Texas Gulf Coast), Class 4 hail markets (Oklahoma, Colorado, Kansas), and any roof where you anticipate solar panel additions later. Step up from 26 to 24-ga for about 35 to 50 percent more material cost — typically $2 to $3 per sq ft installed.
Do I need a deck under a corrugated metal roof or can it go on purlins?
Both work — the choice drives the wall and roof assembly. Open-purlin installation (no deck, panels screwed directly into 2x4 purlins on 24-inch centres) is the agricultural standard and saves $1.50 to $3.00 per sq ft. It allows full attic ventilation through the corrugations but does not provide a continuous air barrier or condensation control, so a vapour barrier and proper insulation strategy are critical. Solid-deck installation (5/8 inch CDX plywood or OSB with synthetic underlayment beneath the metal) is the residential standard and what the IRC R905.10 contemplates for habitable spaces. Solid-deck adds $1.50 to $3.00 per sq ft for the deck and underlayment, and gives a much quieter, more energy-efficient roof.
How is corrugated metal fastened? How often do screws need replacing?
Corrugated metal is fastened with self-drilling hex-head screws #9 or #10 by 1 inch to 2 inch long, with an EPDM (rubber) compression washer under the head. Screws are placed every other corrugation crest (about every 9 inches across the panel) and every 24 inches down the panel into the purlin or solid deck, with 5 to 8 fasteners per sheet at the side-lap. Plan on $0.45 to $1.50 per linear foot of side-lap seam for fasteners. The EPDM washers UV-degrade after 12 to 20 years — schedule a fastener inspection at year 10 and a full re-screw at year 15 to 20. Use coated fasteners that match the panel: bare zinc-plated for galvanized panels, painted PVDF for colour-coated, and stainless or HDG for any panel within one mile of saltwater.
What pitch can take a corrugated metal roof?
Per IRC 2024 R905.10, corrugated metal panels can be installed on slopes of 3/12 (14 degrees) and steeper without modification. Below 3/12, the panels need a self-adhered bituminous membrane on the entire deck (not just eaves) and butyl sealant tape in every side-lap and end-lap, because the corrugations are too shallow to drain sheeting water safely. The MCA-published minimum slope for plain corrugated is 4/12 (18 degrees) without enhanced sealing. For sheds and agricultural buildings the practical floor is about 2/12 with sealed laps, but expect leaks if the slope is taken any lower. For pitches above 12/12 (45 degrees), no special accommodation is needed.
Is a corrugated metal roof loud in rain?
On open-purlin installation (no deck) it is loud — 50 to 70 dB inside during heavy rain, similar to a barn. On solid-deck installation with synthetic underlayment and standard attic insulation (R-38 to R-49), the noise is comparable to an asphalt shingle roof — 35 to 50 dB inside during heavy rain. Adding a rigid foam underlayment (R-Tech, polyiso) or a sound-deadening membrane like Sharkskin Comp or Quietr drops the noise another 10 to 15 dB. For unfinished spaces (porches, patio covers) the rain sound is part of the appeal. For habitable spaces, specify solid deck + synthetic underlay and verify the attic insulation depth before quoting.

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