GAF
NationalHQ: NJContractor program
GAF manufactures residential and commercial roofing products including asphalt shingles, metal roofing, single-ply membranes and coating systems. It has operated since 1886 and is a Standard Industries company.
Roofing Product Manufacturers
Manufacturers matter to a roofing job twice: once for the product, and once for the certification program that decides which contractors can offer their enhanced warranties. Both are here. Program names and tier names are copied verbatim from each manufacturer’s own contractor page, because a wrong tier name is the most visible error a directory like this can make.
40 companies4 categoriesEvery entry taken from the company’s own website
Asphalt Shingle Manufacturers (10)
The steep-slope residential mainstream, plus the solar shingle line that grew out of it.
GAF Energy
NationalHQ: CA
GAF Energy manufactures Timberline Solar®, a nailable solar roofing product installed like a conventional roof. It is headquartered in San Jose, California.
Owens Corning
NationalHQ: OHContractor program
Owens Corning is a publicly traded building products manufacturer headquartered in Toledo, Ohio. Its roofing business makes asphalt shingles, underlayments and roofing components; the company also produces insulation and doors.
CertainTeed
NationalHQ: PAContractor program
CertainTeed is a North American building products manufacturer founded in 1904, when George Brown began manufacturing asphalt roof shingles. It is a subsidiary of Saint-Gobain and makes roofing, siding, ceilings, insulation and gypsum products.
IKO Industries
NationalHQ: ONContractor program
IKO is a vertically integrated roofing manufacturer founded in 1951 in Calgary, Alberta by Isidore Koschitzky, producing asphalt shingles, low-slope roofing and accessories. It operates plants across Canada, the United States and Europe.
Atlas Roofing Corporation
NationalHQ: GAContractor program
Atlas Roofing Corporation was founded in 1982 and manufactures asphalt shingles, underlayments and polyiso roof and wall insulation. It is headquartered in Atlanta, Georgia and operates four divisions.
TAMKO Building Products
NationalHQ: KSContractor program
TAMKO manufactures asphalt shingles, roofing accessories and waterproofing products at United States plants, with its oldest facility operating in Joplin, Missouri since 1944. Corporate headquarters are in Galena, Kansas.
Malarkey Roofing Products
NationalHQ: ORContractor program
Malarkey Roofing Products was founded in 1956 in Portland, Oregon and manufactures residential and commercial roofing products, including polymer-modified asphalt shingles. It operates plants in Oregon, California, Oklahoma and Maryland.
PABCO Roofing Products
RegionalHQ: WAContractor program
PABCO Roofing Products has manufactured asphalt roofing shingles since 1984 and is based in Tacoma, Washington. It is part of Pacific Coast Building Products, Inc.
Building Products of Canada Corp. (BP Canada)
RegionalHQ: QCContractor program
BP Canada was established in 1925 and manufactures asphalt roofing shingles, wood fibre insulation panels and acoustic products at three Canadian plants. It has been part of Saint-Gobain since 2023.
Metal Roofing Manufacturers (9)
Standing seam, exposed fastener and metal shingle systems, and the coil these come from.
McElroy Metal
NationalHQ: LAContractor program
McElroy Metal manufactures metal roofing, wall and building components, including standing seam and exposed-fastener panel systems. The company is employee-owned through an ESOP.
Englert Inc.
NationalHQ: NJContractor program
Englert manufactures metal roofing panels, metal wall panels and seamless gutter systems, along with roll-forming machinery. It became part of Great Day Improvements in 2024.
Drexel Metals
NationalHQ: KYContractor program
Founded in 1985, Drexel Metals supplies architectural standing seam metal roof and wall systems, painted coil and sheet, and roll-forming equipment. It is part of Carlisle Construction Materials.
ATAS International, Inc.
NationalHQ: PA
ATAS International is a family-owned manufacturer of metal panels for the building envelope, founded in 1963 as Aluminum Trim And Shapes and relocated to Allentown, Pennsylvania in 1985. Product categories span metal roofing, wall cladding, ceilings and perimeter edge metal.
Petersen / PAC-CLAD
NationalHQ: IL
Petersen manufactures architectural metal roof and wall panels, flat sheet and coil, and perimeter edge systems under the PAC-CLAD brand. Its primary facility is in Elk Grove Village, Illinois.
Metal Sales Manufacturing Corporation
NationalHQ: IN
Founded in 1963 and headquartered in Sellersburg, Indiana, Metal Sales manufactures metal roofing, wall and building systems. It is part of Cornerstone Building Brands.
Central States Manufacturing
NationalHQ: AR
Central States has produced metal roofing, siding and building packages since 1988 from Rogers, Arkansas. The company is 100% employee-owned.
Union Corrugating Company
RegionalHQ: NC
Union Corrugating has manufactured metal roofing and wall panels since 1946, serving residential, commercial and agricultural markets. It was acquired by Cornerstone Building Brands in December 2021.
Sheffield Metals International
NationalHQ: OH
Sheffield Metals distributes painted Galvalume and aluminum coil and sheet and supplies engineered standing seam metal roof and wall systems. It is part of Architectural Metals Technologies.
Tile, Slate & Synthetic Manufacturers (10)
Clay and concrete tile, quarried slate, and the composite products sold against both.
DaVinci Roofscapes
NationalHQ: KSContractor program
DaVinci Roofscapes manufactures composite slate and shake roofing tiles from virgin resins with UV stabilizers. It is a brand of Westlake Royal Building Products.
Westlake Royal Roofing Solutions
NationalContractor program
Westlake Royal Roofing Solutions is the roofing division of Westlake Royal Building Products, with a portfolio spanning concrete, clay, stone-coated steel and composite roof systems.
Brava Roof Tile
NationalHQ: IAContractor program
Founded in 2008 in Washington, Iowa, Brava manufactures compression-molded composite roofing tiles in shake, slate and Spanish barrel profiles using recycled materials and a mineral-infusion coloring process.
EcoStar LLC
NationalHQ: NY
EcoStar manufactures synthetic slate and shake roofing tiles made of up to 80% recycled plastics and rubbers, from Holland, New York. The business is family-owned.
CeDUR
NationalHQ: CO
CeDUR manufactures synthetic cedar shake roofing using a proprietary polyurethane molding process, from Aurora, Colorado.
Eagle Roofing Products
RegionalHQ: CA
Eagle Roofing Products manufactures concrete roof tile in flat, low, medium and high barrel profiles from Rialto, California.
Ludowici
NationalHQ: OHContractor program
Ludowici has manufactured architectural terra cotta roof tile in New Lexington, Ohio since 1888. Products are made from 100% clay with no petroleum-based or synthetic additives.
Vermont Structural Slate Company
NationalHQ: VT
Established in 1859, Vermont Structural Slate quarries and fabricates natural Vermont slate for roofing and architectural applications. The company is family-owned and operates quarries in Vermont, New York and Virginia.
Evergreen Slate Company
NationalHQ: NY
Evergreen Slate has produced and supplied natural Vermont roofing slate since 1916 from Middle Granville, New York. It offers a range of slate colors, sizes, textures and pre-selected color blends.
North Country Slate
NationalHQ: ON
North Country Slate supplies natural roofing slate across North America from Uxbridge, Ontario, and also distributes Ludowici clay roof tile. It was established as a division of McAsphalt Industries Ltd.
Commercial & Low-Slope Systems (11)
Single-ply, modified bitumen and built-up manufacturers. Our own grouping — these companies carry no subcategory in the source data, because the shingle, metal and tile subcategories do not describe them.
Carlisle SynTec Systems
NationalHQ: PAContractor program
Carlisle SynTec Systems manufactures single-ply commercial roofing membranes and related components. It operates as a division of Carlisle Construction Materials.
Elevate (formerly Firestone Building Products)
NationalHQ: TNContractor program
Elevate manufactures commercial roofing, wall and lining systems in North America. It was named Firestone Building Products until a June 2022 rebrand and is now part of Amrize.
Johns Manville
NationalHQ: COContractor program
Johns Manville manufactures insulation, commercial roofing systems, glass fibers and nonwovens. Its global headquarters is in Denver, Colorado and its history traces to 1858.
Sika Sarnafil / Sika Roofing
NationalHQ: MAContractor program
Sika manufactures commercial roofing membranes in the United States under the Sarnafil brand. Its roofing and waterproofing division is based in Canton, Massachusetts.
Duro-Last
NationalHQ: MIContractor program
Duro-Last custom-fabricates PVC single-ply roofing membranes and accessories for commercial low-slope roofs, from Saginaw, Michigan. It was acquired by Holcim in 2023 and is now part of Amrize.
Versico Roofing Systems
NationalHQ: PAContractor program
Versico Roofing Systems manufactures single-ply commercial roofing membranes and accessories from Carlisle, Pennsylvania. It is a division of Carlisle Construction Materials and a sister brand to Carlisle SynTec.
Mule-Hide Products Co., Inc.
National
Mule-Hide Products markets low-slope roofing systems and accessories to contractors, founded in Chicago in 1906. It is part of ABC Supply.
Tremco Roofing & Building Maintenance
NationalHQ: OHContractor program
Tremco Roofing & Building Maintenance supplies commercial roofing and building envelope systems plus restoration and general contracting services, from Beachwood, Ohio. It is an RPM International company.
SOPREMA (North America)
NationalHQ: OH
SOPREMA manufactures roofing, waterproofing, wall and civil engineering materials, founded in Strasbourg, France in 1908. Its United States headquarters and first US plant opened in Wadsworth, Ohio in 1993.
Polyglass USA
NationalHQ: FLContractor program
Polyglass USA manufactures modified bitumen and single-ply membranes, underlayments, coatings and waterproofing systems from Deerfield Beach, Florida. It has been part of the Mapei Group since 2008.
Henry Company
National
Henry manufactures building envelope products including commercial roofing systems, air and vapor barriers, waterproofing and roofing underlayments. It is a Carlisle company.
Certification programs, and what they actually buy you
- ●A certification is a commercial relationship, not a skills test. Manufacturer programs generally require volume, training, insurance and standing with the manufacturer. They tell you a contractor is inside that manufacturer’s system — which is genuinely useful — but they are not a substitute for a licence, an insurance certificate or a reference.
- ●The tier name is the checkable part. Program and tier names on this page are copied verbatim from each manufacturer’s own contractor page. If a bid claims a tier that does not appear in that manufacturer’s published list, that is worth a question — and several programs widely quoted in this industry were retired or renamed years ago.
- ●Enhanced warranties usually depend on the tier. The long system warranties advertised on residential jobs are typically available only through certified contractors, and often only when the whole system comes from one manufacturer. Verify the contractor’s status with the manufacturer before you sign anything that relies on it.
- ●Nearly all of these sell through distribution. Manufacturers set the product and the warranty; the distributors decide what is on the shelf this week. Both pages are worth reading before a material is specified.
Where the commercial names sit
Single-ply, modified bitumen and built-up manufacturers do not fit the shingle, metal or tile headings, so they are grouped separately above under a heading of our own making rather than forced into a category that misdescribes them. If you are specifying a low-slope roof, that group is your list; the steep-slope groups above it mostly are not.
What is missing here, and why
Some categories in this section are empty on purpose. Every entry above came off the company’s own website; where that evidence did not exist, the category was left empty rather than filled with businesses nobody had checked.
- ●Ventilation, fastener and accessory specialists are not listed yet. Several manufacturers here make vents as part of a wider line, but no vent-only manufacturer has been through verification.
If you run a company that belongs in one of those gaps, or you have found an error in an entry above, tell us about your company. Listing is free and is not for sale.
How to read these listings
Each entry records what a company publishes about itself, on the date it was read. It is not a recommendation, a ranking or a check of anyone’s work, and no company paid to appear here. Where a company publishes a figure about its own size, that figure is quoted as self-reported and linked to the page it came from.
Ownership in this industry changes constantly — distributors merge, manufacturers get acquired, brands get renamed. Where an entry knows about a change, it says so. Before you rely on a detail, follow the link and check it at the source.
Looking for a roofing contractor instead?
The contractor directory is separate from these industry listings. Browse roofing companies by state and city, then confirm any licence and insurance with the state board before work begins.