Duro-Last

What Duro-Last does

Duro-Last is a U.S. manufacturer of custom-fabricated, thermoplastic single-ply roofing systems for flat and low-sloped commercial buildings, founded in 1978 and headquartered in Saginaw, Michigan. Its core technology is a proprietary PVC formulation developed over 40+ years, paired with in-house anti-wicking scrim and a custom-fabrication manufacturing process that completes up to 85% of seams in factory-controlled conditions before jobsite delivery. The product portfolio spans the flagship Duro-Last Membrane (branded 'World's Best Roof'), Duro-Last X (DLX) 10-foot roll goods, Duro-Life 600 (50-year efficiency), Duro-Tuff, Duro-Fleece, Duro-Last EV (KEE+PVC), and Duro-TECH TPO, complemented by an integrated system of accessories, flashings, metal roof/wall panels, insulation, and coatings.

The company operates as a division of Amrize Building Envelope LLC following Amrize's 2025 spinoff from Holcim and NYSE listing; Duro-Last was originally acquired by Holcim in 2023. Revenue is generated primarily through one-time sales of roofing systems to authorized contractors, who install products for commercial building owners; the model includes a National Accounts Program for multi-location owners and Cooperative Purchasing for government buyers. Eight U.S. manufacturing facilities (Saginaw MI, Jackson MS, Sigourney IA, Grants Pass OR, Ludlow MA, Carrollton TX, Largo FL, Kernersville NC, and Dallas TX) and 80+ quality assurance technical representatives support the certified contractor channel. Vertical integration extends through wholly-owned subsidiaries Plastatech Engineering (film), TIP-TOP Screw Manufacturing (fasteners), EXCEPTIONAL Metals (edge/drainage), and Oscoda Plastics (recycled flooring). Cumulative installations exceed 2 billion square feet across North America.

Name

Duro-Last

Legal name

Amrize Building Envelope LLC

Website

https://duro-last.com

Company type

Private

Founded year

1978

Operating status

Operating

Headcount range

251–500 employees

Short description

Duro-Last manufactures custom-fabricated thermoplastic single-ply roofing systems for flat and low-sloped commercial buildings, selling through a certified authorized contractor network across North America. The company operates as a brand within Amrize Building Envelope, with eight U.S. manufacturing facilities and 2 billion+ square feet of membrane installed since 1978.

Ownership category

akta.pro rank

Product category

Commercial Roofing Systems

SIC

Unsupported Plastics Film & Sheet (3081)

akta.pro primary industry

Automotive Roof Systems & Convertible Top Components Manufacturing (Panoramic Roof Modules/Soft Tops) (IMACAKAK)

akta.pro secondary industry

Flashing, Edge Metal & Roof Accessories (IMADAFAJ)

Keywords

• Commercial roofing systems
• Single-ply membranes
• PVC roofing materials
• Custom-fabricated roofing
• Thermoplastic roofing products

Headquarters

HQ city

Saginaw

HQ country

United States

HQ region

North America

Offices9 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Supply Chain, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. PVC Roofing Membranes: Sale of custom-fabricated and roll goods PVC roofing membranes - the flagship product line known as the 'World's Best Roof'. Membranes are sold through authorized contractors to commercial building owners.
2. TPO Roofing Products: Duro-TECH TPO membranes, accessories and adhesives introduced in 2025, expanding product portfolio for thermoplastic polyolefin applications.
3. Metal Roof and Wall Systems: Metal roof panels, metal wall panels, edge metal and drainage components through EXCEPTIONAL Metals brand.
4. Coatings and Materials: Duro-Shield coatings and related materials for roof protection and restoration.
5. Roofing Components: Duro-Guard insulation, cover boards, vapor barriers, fasteners, adhesives, skylights, pipe stands, flashings and accessories sold as integrated system components.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels7 records

Core offering

Duro-Last manufactures custom-fabricated thermoplastic single-ply roofing systems, primarily based on its proprietary PVC formulation, for flat and low-slope commercial buildings. The company sells its membranes, metal systems, coatings, and integrated roofing components exclusively through a network of authorized contractors across North America, with warranties ranging from 10 to 30+ years. Its core differentiator is factory-controlled custom-fabrication, which allows up to 85% of seams to be completed before jobsite delivery.

Product overview

Duro-Last is a manufacturer of custom-fabricated single-ply roofing systems, operating as a platform-plus-products architecture centered on its proprietary PVC formulation technology. The product portfolio spans multiple membrane families including Duro-Last Membrane (flagship custom-fabricated PVC), Duro-Last X (10-foot roll goods), Duro-Life 600 (50-year efficiency), Duro-Tuff (roll goods), Duro-Fleece/Fleece Plus (fleece-backed), Duro-Last EV (KEE+PVC), and Duro-TECH TPO. These membranes are complemented by an extensive accessories line featuring flashings, vents, drains, walkway pads, and specialty products like the VADA Vented Roof System for wind resilience and SWIF Rack for solar integration. The company also offers metal roof/wall systems, metal retrofit solutions, and full component systems including insulation, cover boards, vapor barriers, and skylights. The custom-fabrication capability allows up to 85% of seams to be completed in factory-controlled environments before delivery to jobsites. Duro-Last serves diverse commercial building segments including data centers, hospitals, restaurants, retail, schools, and warehouses.

Differentiator

Problem solved

Functional benefit

Brands

• Plastatech Engineering: Engineering division manufacturing film components of Duro-Last membrane
• Oscoda Plastics
• TIP-TOP Screw Manufacturing
• EXCEPTIONAL Metals
• Duro-Last X (DLX)
• Duro-Life 600
• Duro-Tuff
• Duro-Fleece
• Duro-Last EV
• Duro-Shield
• Duro-Guard
• Duro-TECH TPO
• VADA Vented Roof System
• SWIF Rack
• ROOF-TRAK

Products and services

• Duro-Last Membrane
• Duro-Last X (DLX)
• Duro-Life 600
• Duro-Tuff
• Duro-Fleece / Duro-Fleece Plus
• Duro-Last EV / Duro-Last EV Fleece
• Duro-TECH TPO / Duro-TECH Fleece TPO
• VADA Vented Roof System
• SWIF Rack Solar Racking
• PVC/TPO Tie-In Strip
• Duro-Shield Coatings
• Duro-Guard Insulation and Cover Boards
• EXCEPTIONAL Metals Roof and Wall Systems
• Metal Retrofit System
• Custom-Fabricated Flashings and ROOF-TRAK Walkway Pads
• Duro-Light Skylights

Quantifiable outcome

• Up to 85% of seams can be completed in factory-controlled environment vs. traditional roll goods requiring 7,968 linear feet vs. 1,278 linear feet for custom-fabricated systems
• +3 more outcomes

Named customers8 records

Segments10 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Six partnerships are on record, tiered core and minor.

• Amrize Building EnvelopecoreOthers · 1 September 2025Amrize Building Envelope is the parent company of Duro-Last, created through a successful spinoff from Holcim and publicly listed on the New York Stock Exchange in 2025. Duro-Last is a core brand within the Amrize Building Envelope division alongside Exceptional Metals, Plastatech Engineering, Oscoda Plastics, and TIP-TOP Screw Manufacturing.
• DuPontcoreStrategic or Co-development Partner · 1 January 2022Duro-Last partnered with DuPont in 2022 to introduce Duro-Life 600, a 50-year ultra-high efficiency roofing membrane combining DuPont's technology with Duro-Last's manufacturing and custom-fabrication capabilities.
• NRCA (National Roofing Contractors Association)coreStrategic or Co-development PartnerTraining partnership with NRCA for contractor certification and professional development programs. Duro-Last cites NRCA as a key industry training partner along with National Women in Roofing and SkillsUSA.
• National Women in RoofingminorStrategic or Co-development PartnerWorkforce development partnership supporting recruitment and training of women in the roofing industry through skills development programs.
• SkillsUSAminorStrategic or Co-development PartnerEducational partnership supporting vocational training and workforce development in roofing and construction trades.
• Industry Associations (NRCA, MRCA, Midwest Roofing Contractors, ASCE, ASTM, CRRC, etc.)coreStrategic or Co-development PartnerActive membership and participation in industry organizations including NRCA, Michigan Roofing Contractors Association, Midwest Roofing Contractors Association, ASCE, ASTM International, Cool Roof Rating Council (CRRC), and other trade associations to support industry standards and contractor community.

Scale indicators5 records

Recent moves15 records

Expansion highlights5 records

Direct peers

• Carlisle Construction Materials: Carlisle SynTec (Carlisle Construction Materials) is a leading manufacturer of single-ply EPDM, TPO, and PVC roofing membranes. It is Duro-Last's most direct competitor in the commercial single-ply roofing membrane category, with comparable UL/FM certifications, contractor networks, and full system offerings.
• GAF Materials: GAF is one of North America's largest roofing manufacturers offering TPO, PVC, and EPDM membranes alongside steep-slope products. It competes head-to-head with Duro-Last in commercial single-ply roofing and shares the contractor-distribution model.
• Firestone Building Products: Firestone Building Products (now part of Holcim prior to the Amrize spinoff structure) manufactures EPDM, TPO, and PVC roofing systems. It is a direct competitor in commercial single-ply membranes and historically a sister company to Duro-Last under Holcim Building Envelope.
• Sika Sarnafil: Sika Sarnafil is a long-established manufacturer of PVC single-ply roofing membranes. It directly competes with Duro-Last in the PVC single-ply segment with comparable factory-fabrication capabilities, warranties, and code approvals for commercial flat and low-slope roofs.
• Versico Roofing Systems: Versico is a major manufacturer and distributor of EPDM and TPO single-ply roofing systems serving commercial contractors. It directly competes with Duro-Last in single-ply membranes with a similar contractor-authorized model.
• IB Roof Systems: IB Roof Systems is a focused PVC single-ply roofing membrane manufacturer serving commercial contractors in North America. It is a direct competitor to Duro-Last in the PVC membrane segment with comparable warranties and contractor certification programs.

Broad incumbents

• Johns Manville: Johns Manville (Berkshire Hathaway) manufactures TPO, EPDM, and PVC roofing membranes as part of a broad building insulation and roofing portfolio. It is a broader incumbent competing with Duro-Last across multiple commercial roofing chemistries and systems.
• Tremco Roofing and Building Maintenance: Tremco offers a broad portfolio of roofing systems including single-ply membranes, coatings, and built-up roofing for commercial customers. As a broader incumbent in commercial roofing solutions, it overlaps with Duro-Last's full system approach.
• CertainTeed Roofing: CertainTeed (Saint-Gobain) offers commercial roofing membranes including TPO and PVC alongside steep-slope products. As a broad building products incumbent, it overlaps with Duro-Last in single-ply commercial roofing while serving much wider product categories.

Others

• Holcim (Amrize parent context): Holcim/Amrize is the parent company of Duro-Last Building Envelope. While not a direct competitor, the parent's broader roofing and building envelope portfolio (historically including Firestone Building Products and Malarkey) shapes competitive dynamics and capital allocation for Duro-Last.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/durolast
• YouTubeyoutube.com/durolastroofing
• Facebookfacebook.com/durolast
• LinkedInlinkedin.com/company/duro-last-roofing

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Duro-Last