Who owns DECRA and Tilcor, who issues each warranty, where each maker says it manufactures, and one checklist that applies to every brand.
There is no single official list of stone-coated steel roofing manufacturers. This guide covers three of the lines sold in the US: IKO’s DECRA and Tilcor, and Westlake Royal’s Unified Steel Stone Coated Roofing. It is built from the makers’ own documents and purchase announcements, trade-press reports and public code-evaluation listings we checked in October 2026.
Stone-coated steel is roofing made of steel panels coated with stone granules and formed into tile, shake or shingle profiles (panel styles). RISE Roofing is certified with DECRA and Tilcor and installs both, so we are not a neutral party. That is why this page sticks to what the documents say.
An evaluation report assesses a product against named building codes and sets the conditions for installing it. Evaluations are split across ICC-ES, QAI Laboratories, Florida’s product-approval system, Miami-Dade County and the Texas windstorm program, so no single directory is a complete list.
As of October 2026, the Texas Department of Insurance (TDI) windstorm product-evaluation listings include stone-coated steel lines from IKO (the DECRA and Tilcor brands) and from Westlake Royal (Unified Steel), along with several other brands. TDI’s page states: “TDI does not approve the use of or endorse any product.”
Here is what the documents say about each line.
| Line | Owner | Warranty issuer | Evaluations cited in this guide | Where the documents say it is made |
|---|---|---|---|---|
| DECRA | IKO | IKO Metals USA Inc. | ICC-ES ESR-1754 and ESR-2901 | IKO: Ennis, Texas (2025 plant). ICC-ES reports: Corona, California. |
| Tilcor | IKO | IKO Metals USA Inc. | Florida FL27421 and FL43763 | IKO: Ennis, Texas (2025 plant). Tilcor’s history page (2011 entry): “from our New Zealand factory”. |
| Unified Steel Stone Coated Roofing | Westlake | Westlake Royal Building Products | QAI CERus-1008; Florida FL27408 | Westlake: “Made in the USA”. QAI report: Oceanside, California. |
IKO, a roofing manufacturer that describes itself as “a family owned business established in 1951,” bought the two brands in two steps. On November 1, 2018, IKO announced in its Roof Tile Group news release that it had “concluded a deal that will see it acquire the operations of the Roof Tile Group from New Zealand based manufacturer and builder Fletcher Building.” Roof Tile Group’s brands included DECRA and Gerard; the Gerard name also appears in the US history of Westlake’s line, covered below.
On September 1, 2021, IKO announced in its Ross Roof Group news release that it “has acquired New Zealand based Ross Roof Group (RRG)”, which it called “a manufacturer and exporter of stone coated metal roof tiles.” That release does not mention Tilcor. Tilcor’s own history page makes the link: Ross Roof Group “manufactures the Tilcor brand” for markets that include America.
Both brands’ current US warranties are issued by the same company, IKO Metals USA Inc. Set side by side, the two warranty documents read the same apart from the brand name and the edition date. The code listings, though, are held by DECRA Roofing Systems, Inc. and by Ross Roof Group USA Inc. dba Tilcor North America.
On July 16, 2025, IKO held the grand opening of a 205,000-square-foot plant in Ennis, Texas. IKO’s release says the plant makes “stone-coated metal roofing in tile, shake, and shingle profiles under the DECRA and Tilcor brands.” Roofing Contractor reported that “Production at the facility began earlier this year” and that the plant “replaces the company’s decommissioned Corona, Calif., facility”.
DECRA’s code reports still name Corona. ESR-1754, reissued November 2025, says: “The roofing panels are manufactured in Corona, California, under a quality control program with inspections by ICC-ES.” ESR-2901 says the same. By Roofing Contractor’s account, production in Ennis began in 2025, so the panels on a DECRA or Tilcor roof installed before then were made elsewhere.
Both brands make tile, shake and shingle profiles. Our metal tile roof guide covers DECRA Villa Tile, DECRA Tile and Tilcor Antica from each maker’s specifications, and our guide to metal roofing that looks like shingles covers the shingle and shake profiles.
DECRA’s history post (October 2025) says the story “dates back to the World War II Blitz of the United Kingdom”, when Decraspray Co. developed a protective coating for British buildings. By DECRA’s account, Lou Fisher, “a New Zealand entrepreneur,” acquired the rights to make the coating outside the UK and trademarked it in 1955 as Decramastic.
DECRA’s post on how its roofing is made picks up from there: “In 1957, he began applying the unique coating to galvanized steel roof tiles.” Fisher added crushed stone granules. DECRA dates its roofing to 1957 on that basis; its history post adds that the DECRA name was trademarked in 1978.
A 2007 Roofing Contractor profile adds the US side: “The products were first introduced to Honolulu in 1968, but the company asserts DECRA’s sales in the continental United States really took hold in California during the 1980s.” The same profile said DECRA was then owned by Fletcher Building in New Zealand, the seller in IKO’s 2018 Roof Tile Group deal.
Tilcor traces its roots to New Zealand. Its history page says: “We originally made concrete blocks and concrete tiles back in 1942”. By the same timeline, the family company began making stone-coated metal roofing tiles in New Zealand in 1989.
The Tilcor name dates from 2011. The timeline’s entry for that year reads: “Started Tilcor Roofing Systems to supply the European, USA, Africa and Middle East markets from our New Zealand factory.” The 2015 entry reads: “Opened offices in America to service and manage the American markets.” IKO’s purchase of Ross Roof Group followed in 2021.
If you are choosing between DECRA and Tilcor profiles for your own home, our page on stone-coated steel roofing in Houston covers the profiles we install. Call (832) 224-3435 to talk through the options for your roof.
Other brands appear in the same public listings. One is Unified Steel Stone Coated Roofing, sold by Westlake Royal Building Products. Until 2022 it was called Boral Steel, a line launched in 2019 that consolidated steel roofing systems from Gerard and Metro.
In May 2014, Roofing magazine reported that Headwaters, a building products company, had acquired the assets of Metals USA’s roofing products business, which it identified as “Gerard”. In February 2016, Roofing Contractor reported that Headwaters had added Metro Roof Products. Boral Limited completed its purchase of Headwaters in May 2017, as Qualified Remodeler reported.
In April 2019, Roofing Contractor reported that “Boral Roofing LLC has introduced Boral Steel, its rebranded stone-coated steel product line”. Boral had acquired the Gerard and Metro lines with Headwaters.
On October 1, 2021, Westlake announced in a news release that it had completed its purchase of Boral Limited’s North American building products businesses, roofing included. In February 2022, Westlake Royal introduced Unified Steel Stone Coated Roofing, “formerly known as Boral Steel – Stone Coated Roofing”. A Westlake technical bulletin revised in March 2026 still records the older names, for example “BARREL-VAULT Tile (formerly Gerard Barrel Vault)”. In the US, the Gerard line was absorbed and renamed; outside the US, the Gerard Roofs New Zealand website carries an “IKO Asia Pacific Limited 2026” footer.
Westlake’s Unified Steel page says “Made in the USA”, and its QAI Laboratories evaluation report (CERus-1008, revised March 2026) says the panels “are manufactured in Oceanside, CA with inspections by QAI”.
RISE Roofing does not install Westlake’s stone-coated steel. The Westlake products we install are its concrete and clay roof tiles; see our clay tile roofing page.
These five questions apply to every brand on this page, DECRA and Tilcor included, and to any other stone-coated metal roofing manufacturers you are considering. Each one points to a document you can ask for or look up.
Price is a separate question. Our stone-coated steel roofing cost page covers it.
All three are manufacturer warranties: they cover manufacturing defects in the maker’s own product, not the quality of the installation. IKO’s two warranties and Westlake’s differ on how long coverage lasts on a single-family home, which defects each one lists, whether later years are prorated, how the warranty passes to a later owner, and how disputes are settled. Read the current documents: DECRA’s Lifetime Limited Warranty (10/2025), Tilcor’s US Lifetime Limited Warranty (03/2026) and Westlake’s Unified Steel Limited Fully Transferable Warranty (October 2025). In IKO’s two documents, “lifetime” on a single-family home means “for the lifetime of the Owner while the Owner owns the dwelling.” DECRA’s says the terms “in effect at the time of your purchase of the Roof System shall govern your Roof System”, so keep the edition you were given.
Each table below summarizes the current published warranty for one brand from these stone-coated steel roofing manufacturers, in the same rows and order. A summary leaves terms out, so read the full warranty, linked under each table, for the complete terms.
| Term | What the warranty says |
|---|---|
| Issued by | IKO Metals USA Inc. |
| Edition | 10/2025 (footer date). Applies to roofs purchased and installed in the US or Canada on or after September 10, 2020; the edition in effect at purchase governs. |
| Who is covered | The original consumer purchaser, meaning the property owner and “not the contractor or installer”, or the first person it is transferred to with the building. |
| Length of coverage | Single-family detached home: “for the lifetime of the Owner while the Owner owns the dwelling.” Other structures: 50 years from installation; after year 20, materials only and prorated. |
| Defects listed | Manufacturing defects that directly result in leaks, result in wind blow-off of panels by winds of up to 120 mph, or result in penetration by hailstones of 2.5 inches or less; a separate remedy covers loss of surface coating. |
| Wind | A manufacturing defect that “results in blow off of panels as components of the Roof System by winds of up to 120 mph (193 kph)”. |
| Hail | A manufacturing defect that “results in damage to the Roof System caused by the penetration of hailstones of 2.5 inches (6 cm) or less completely through the Roof System”. |
| Surface coating | A manufacturing defect causing “material deterioration of the surface coating” that substantially impairs the roof’s appearance from ground level at least 10 feet away, “not including normal weathering such as minor granule loss or fading, or any loss of surface coating caused by hailstones or any weather event”. |
| Years 1 to 20 | Liability is limited to the reasonable replacement cost, labor and materials, of the defective components, as determined by the Company. |
| After year 20 | Single-family home, years 21 to 40: materials only, “prorated at 1/600 per month elapsed since the original installation”. Years 41 and beyond: 20% of the reasonable replacement cost, materials only. |
| Repair, replace or refund | Repair or replace, at the Company’s option. Liability may not exceed the owner’s original purchase price for the roof, which the Company may refund instead of any other remedy. |
| Matching replacement panels | The Company will try to match color and design “but does not guarantee that such replacement materials will be available”, and bears no responsibility for differences in color or appearance. |
| Products covered | IKO Metals USA Inc. roofing panels and system (the “Roof System”). Accessories: not stated separately in the warranty. |
| Hurricanes, tornadoes and debris | Hurricanes and tornadoes are not named. The wind remedy is the one under Wind above: blow-off of panels caused by a manufacturing defect, in winds of up to 120 mph. Excluded: damage from improper foot traffic or foreign objects, and any cause “other than those detailed above”. |
| Acts of God | Excluded: damage caused by “other acts of God”. |
| Transfer to a new owner | Once, by the original purchaser, within 20 years of installation. The transfer details and proof of purchase must be mailed within 30 days of the change of ownership; “Further transfers or transfers not in compliance with this notice provision will void the warranty.” |
| Registration | Not stated in the warranty. DECRA’s registration page says: “Registration is not required for warranty coverage.” |
| Making a claim | Contact IKO Warranty Services within 30 days of becoming aware of the concern; send proof of purchase and photos within 30 days of discovery; allow an inspection if asked. |
| Disputes | Mandatory binding arbitration where the law allows, with no class actions. The Company will not elect arbitration for a claim filed in court in which the owner agrees not to seek more than $25,000, including attorneys’ fees and costs, “so long as the claim is individual and pending only in that court.” US residents may opt out in writing within 45 days after installation or a valid transfer. |
| Term | What the warranty says |
|---|---|
| Issued by | IKO Metals USA Inc. |
| Edition | 03/2026 (footer date). Applies to roofs purchased and installed in the US or Canada on or after September 10, 2020; the edition in effect at purchase governs. |
| Who is covered | The original consumer purchaser, meaning the property owner and “not the contractor or installer”, or the first person it is transferred to with the building. |
| Length of coverage | Single-family detached home: “for the lifetime of the Owner while the Owner owns the dwelling.” Other structures: 50 years from installation; after year 20, materials only and prorated. |
| Defects listed | Manufacturing defects that directly result in leaks, result in wind blow-off of panels by winds of up to 120 mph, or result in penetration by hailstones of 2.5 inches or less; a separate remedy covers loss of surface coating. |
| Wind | A manufacturing defect that “results in blow off of panels as components of the Roof System by winds of up to 120 mph (193 kph)”. |
| Hail | A manufacturing defect that “results in damage to the Roof System caused by the penetration of hailstones of 2.5 inches (6 cm) or less completely through the Roof System”. |
| Surface coating | A manufacturing defect causing “material deterioration of the surface coating” that substantially impairs the roof’s appearance from ground level at least 10 feet away, “not including normal weathering such as minor granule loss or fading, or any loss of surface coating caused by hailstones or any weather event”. |
| Years 1 to 20 | Liability is limited to the reasonable replacement cost, labor and materials, of the defective components, as determined by the Company. |
| After year 20 | Single-family home, years 21 to 40: materials only, “prorated at 1/600 per month elapsed since the original installation”. Years 41 and beyond: 20% of the reasonable replacement cost, materials only. |
| Repair, replace or refund | Repair or replace, at the Company’s option. Liability may not exceed the owner’s original purchase price for the roof, which the Company may refund instead of any other remedy. |
| Matching replacement panels | The Company will try to match color and design “but does not guarantee that such replacement materials will be available”, and bears no responsibility for differences in color or appearance. |
| Products covered | IKO Metals USA Inc. roofing panels and system (the “Roof System”). Accessories: not stated separately in the warranty. |
| Hurricanes, tornadoes and debris | Hurricanes and tornadoes are not named. The wind remedy is the one under Wind above: blow-off of panels caused by a manufacturing defect, in winds of up to 120 mph. Excluded: damage from improper foot traffic or foreign objects, and any cause “other than those detailed above”. |
| Acts of God | Excluded: damage caused by “other acts of God”. |
| Transfer to a new owner | Once, by the original purchaser, within 20 years of installation. The transfer details and proof of purchase must be mailed within 30 days of the change of ownership; “Further transfers or transfers not in compliance with this notice provision will void the warranty.” |
| Registration | Not stated in the warranty or on Tilcor’s US warranty page. |
| Making a claim | Contact IKO Warranty Services within 30 days of becoming aware of the concern; send proof of purchase and photos within 30 days of discovery; allow an inspection if asked. |
| Disputes | Mandatory binding arbitration where the law allows, with no class actions. The Company will not elect arbitration for a claim filed in court in which the owner agrees not to seek more than $25,000, including attorneys’ fees and costs, “so long as the claim is individual and pending only in that court.” US residents may opt out in writing within 45 days after installation or a valid transfer. |
| Term | What the warranty says |
|---|---|
| Issued by | Westlake Royal Building Products |
| Edition | October 2025 (footer date). Effective dates, and which edition governs an older roof: not stated in the warranty. |
| Who is covered | The owners of the Property (the residence or other building it is installed on), later owners included. |
| Length of coverage | 50 years from installation on a residence or other building. |
| Defects listed | Manufacturing defects that would cause the damages it lists. It warrants that the Product will keep its surface coating appearance (normal weathering excepted), withstand winds of up to 120 mph, not warp, lift or curl when installed to local code and Westlake Royal’s instructions, and not be penetrated by hailstones less than 2½ inches in diameter. |
| Wind | The Product “will withstand winds of up to one hundred and twenty (120) miles per hour”. |
| Hail | The Product “will not be penetrated by hailstones less than two and one-half inches” in diameter. |
| Surface coating | The Product will keep its surface coating appearance except for normal weathering, which “may include minor granule loss or minor fading”. Excluded: “color fading, color changes or variations of the color hue or physical deterioration of the color for any reasons”. |
| Years 1 to 20 | If Westlake Royal chooses to replace: liability is limited to replacement Product plus the reasonable cost of labor. |
| After year 20 | Years 21 to 50, if Westlake Royal chooses to replace: replacement Product, but Westlake Royal “will not be liable for any costs of labor for such replacement.” |
| Repair, replace or refund | Repair, replace or refund the purchase price, at Westlake Royal’s option. |
| Matching replacement panels | Westlake Royal will try to match color and design, but color may vary between production runs and it “may discontinue or change the design of a particular Product profile”; it may substitute “Product of similar design and color.” |
| Products covered | Panels made entirely by Westlake Royal. “Westlake Royal does not warrant any accessory materials.” |
| Hurricanes, tornadoes and debris | Excluded: damage from hurricanes or tornadoes with wind speeds “in excess of one hundred twenty (120) miles per hour”, from debris contact resulting from hurricane or tornado force winds, and from roof traffic or falling objects. |
| Acts of God | Excluded: damage caused by “other acts of God”. |
| Transfer to a new owner | Automatic, to any subsequent owners of the Property during the warranty term; a sale does not waive the conditions for coverage. |
| Registration | It “may be registered by Buyer at WestlakeRoyalBuildingProducts.com.” |
| Making a claim | Notify Westlake Royal within 30 days after the facts become known, with proof of purchase; Westlake Royal must have the chance to investigate and approve the claim. |
| Disputes | Arbitration: not stated in the warranty. |
RISE Roofing is certified with Owens Corning, DECRA and Tilcor. We install every DECRA profile and every Tilcor profile, and we install Tilcor Antica direct to the deck, meaning the panels fasten straight to the roof sheathing instead of to battens (wood or steel strips). Our certified installation crew has installed DECRA for over 20 years.
Every DECRA roof we install comes with DECRA’s manufacturer warranty, which for the first 20 years after installation covers labor and materials to repair or replace a component with a manufacturing defect.
The photos on this page show a DECRA Villa Tile roof in Rustico Clay that we installed on a ranch in Refugio, Texas. That roof was a finalist for DECRA’s 2025 Project of the Year.
If you are comparing stone-coated steel roofing manufacturers for your own home, put the five questions above to every quote you have. For DECRA, see our page on DECRA roofing in Houston. Call (832) 224-3435 or request a free estimate.
ICC-ES Evaluation Reports ESR-1754 (reissued November 2025) and ESR-2901 (reissued September 2025; marked “Subject to renewal September 2026”); QAI Laboratories CERus-1008 (revised March 2026); Texas Department of Insurance windstorm and Florida product-approval listings; IKO news releases (2018, 2021, 2025); DECRA blog posts, Lifetime Limited Warranty (10/2025), registration page and technical bulletin; Tilcor Our History page, US warranty page and US Lifetime Limited Warranty (03/2026); Westlake Royal Building Products Unified Steel page, Limited Fully Transferable Warranty (October 2025) and technical bulletin (revised March 2026); Westlake news release (October 1, 2021); Roofing Contractor (2007, 2016, 2019, 2022, 2025); Roofing magazine (2014); Qualified Remodeler (2017); Gerard Roofs New Zealand website. All read October 4, 2026. Makers and agencies revise these documents, so confirm current terms before you rely on them.
IKO, a roofing manufacturer that describes itself as a family-owned business established in 1951. On November 1, 2018, IKO announced a deal to acquire the operations of Roof Tile Group, whose brands included DECRA, from New Zealand’s Fletcher Building. DECRA’s current US warranty is issued by IKO Metals USA Inc.
They are separate brands with the same owner. IKO announced on September 1, 2021 that it had acquired New Zealand-based Ross Roof Group, and Tilcor’s own history page says Ross Roof Group manufactures the Tilcor brand. Both brands’ current US warranties are issued by IKO Metals USA Inc., and apart from the brand name and edition date their terms read the same.
IKO says DECRA and Tilcor are made at its plant in Ennis, Texas, where it held a grand opening on July 16, 2025. Roofing Contractor reported that production there began earlier that year and that the plant replaces DECRA’s decommissioned Corona, California facility. DECRA’s ICC-ES evaluation reports, the latest reissued in November 2025, still say the panels are manufactured in Corona. By Roofing Contractor’s account, a DECRA roof installed before 2025 was not made in Ennis.
We found no published test that ranks the brands against each other, so this page does not name one. Compare the documents instead: who issues the warranty, how it transfers and what it covers after year 20, whether the profile has a current code evaluation and is still in production, and where the maker says it is made.
No. DECRA’s warranty registration page says registration is not required for warranty coverage. The warranty does set conditions: report a concern to IKO Warranty Services within 30 days of becoming aware of it, and if you sell the home, the warranty can be transferred once, within the first 20 years after installation, if the transfer details and a copy of the original proof of purchase are mailed to IKO within 30 days of the change of ownership.
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