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The Directory of Roof Assemblies (DORA) now calls its database entries “assemblies” instead of “listings.” Announced by the Single Ply Roofing Industry (SPRI) on September 20, 2024, the wording change is intended to show that each entry represents a complete, tested roof-system configuration and its supporting components—not a bare list of products.
The underlying service remains a free public database of roof systems tested to standards referenced in Chapter 15 of the International Building Code (IBC). It is most useful when a design team needs to find a documented single-ply or modified-bitumen system, check its reported wind-uplift capacity, and compare that configuration with a project’s deck, application, and design requirements.
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What changed in DORA’s terminology?
SPRI announced the platform-wide change from “listings” to “assemblies” on September 20, 2024. The announcement describes the update as a clarification of language throughout DORA, not as a new testing standard or a change to the technical acceptance process.
The reason is practical: a roof assembly is a coordinated system. It includes the roof covering and the other layers and components that were evaluated together over a particular deck and under a defined application. Calling the database records “assemblies” signals that users should read them as system-level configurations rather than as isolated product advertisements.
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“Transitioning from the term ‘listings’ to ‘assemblies’ within all language in the platform, this change emphasizes DORA’s commitment to presenting only third-party tested and approved roofing components, further enhancing clarity and precision for its users.”
The wording update does not, by itself, establish that an assembly is suitable for every building, jurisdiction, climate, or attachment method. It changes how the directory describes the records; project teams still have to match the published configuration and performance information to the design and code requirements for the job.
What does DORA mean by a roof assembly?
In DORA, an assembly is the roof-system configuration supported by test documentation and a qualified evaluation. The record is intended to keep the relevant components together so a specifier can evaluate the system that was tested, rather than selecting a membrane or deck product without its associated layers.
That distinction matters because roof performance depends on the relationship between components. The same covering can be used over different decks, attachment patterns, or insulation arrangements, while the tested wind-uplift result may differ. DORA’s terminology encourages users to stay with the complete configuration represented by the documentation.
Use “assembly” as a description of the database record, not as a guarantee that every component is interchangeable. If a proposed project changes the deck, cover board, insulation, fasteners, adhesive, membrane, or application method from the published configuration, the design professional should determine whether the resulting system is still supported by an applicable evaluation or requires additional documentation.
What is DORA, and who operates it?
SPRI describes DORA as a free public database service for roof systems tested to standards referenced in IBC Chapter 15. SPRI sponsors the directory, while Intertek administers the service. The separation is useful to understand: SPRI provides the industry association sponsorship, and the program administrator handles the submission and publication process.
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DORA is aimed at people who need documented roof-system information, including consultants, architects, building owners, code officials, roofing contractors, and other commercial-roofing professionals. An overview from the International Institute of Building Enclosure Consultants (IIBEC) describes the directory as a resource for low-slope systems and discusses searching, ratings, saved favorites, and specification sheets.
“Free” refers to public access to the directory. It does not mean that design, engineering, inspection, testing, or construction services are included. Those remain separate project responsibilities.
What roof systems can I find in DORA?
The directory’s described scope is specific rather than universal. SPRI says DORA provides wind-uplift load-capacity information for single-ply and modified-bitumen roof systems. Its directory description identifies several deck types and covering categories.
| Directory scope | What the description supports | How to use it |
|---|---|---|
| Roof coverings | Single-ply and modified-bitumen systems | Filter or review records within those covering families; do not assume every roofing technology is represented. |
| Performance information | Reported wind-uplift load capacity | Compare the published value with the project’s required uplift resistance and design basis. |
| Deck types named by the directory | Cementitious wood fiber, concrete, gypsum, panelized concrete, steel, and wood | Confirm that the project deck matches the tested or evaluated configuration. |
| Documentation | Test reports and qualified evaluations supplied with submissions | Read the supporting documents and conditions, not only the summary record. |
This is the database’s stated scope, not a claim that DORA contains every roof assembly or every performance attribute. A record may provide useful uplift information while leaving other design questions—such as drainage, fire performance, thermal requirements, compatibility, or jurisdictional approvals—to the project’s specifications and responsible professionals.
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Participating companies submit assemblies with test reports and qualified evaluations. SPRI says the supporting documentation is independently validated and that submissions are reviewed by the program administrator before publication. Intertek administers that service.
That process gives users a reason to treat a published record as documented evidence of a tested or evaluated configuration. It does not turn the directory into a substitute for reading the test report, evaluation, installation conditions, or limitations. The assembly record should be the starting point for verification, especially when a project departs from the listed materials or methods.
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Also keep the terminology precise: the 2024 announcement links the word “assemblies” to third-party tested and approved components, but it does not say that the naming change altered the technical criteria or created a new approval category.
How do I search DORA for a suitable assembly?
Public users can search, view, save, and print assemblies without paying for access. The directory also describes project-library functions, saved searches, and notifications when new assemblies match a saved search.
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- Define the project requirement first. Record the roof covering family, deck type, application, and required wind-uplift performance from the project documents. If the uplift requirement has not been established, ask the responsible design professional rather than choosing a directory value by guesswork.
- Search by the configuration that must remain fixed. Start with the deck and covering type, then narrow by application or other available criteria. Searching only for a familiar membrane brand can return records that do not match the project deck or attachment approach.
- Open the complete assembly record. Review the listed components, ratings, and any specification sheet or supporting documentation. Check that the record’s configuration—not merely one product name—matches the proposed design.
- Compare the reported uplift value with the design requirement. Treat the published capacity as information for the tested or evaluated assembly. Confirm that the project’s design calculations, perimeter and corner conditions, and applicable code provisions are addressed by the design team.
- Save records for coordination. Use favorites, a project library, or printed specification sheets to keep the selected assembly and its documentation with the project file.
- Monitor changes when the project is active. A saved search and notification can alert users when new matching assemblies are added, which is useful during specification development or value-engineering reviews.
A search result is not automatically a recommendation. The useful outcome is a documented candidate assembly that can be checked against the project’s drawings, specifications, calculations, procurement constraints, and jurisdictional review.
How should architects and contractors use an assembly record?
Use DORA as a documentation and coordination tool. Architects and consultants can use it while developing a roof specification; contractors can use it to identify complete system options and verify that a proposed substitution remains within a documented configuration; owners can use it to retain system information for maintenance and future work.
A disciplined review asks four questions:
- Is the roof covering the same? Confirm the single-ply or modified-bitumen category and the specific product family identified in the record.
- Is the deck the same? A steel, concrete, gypsum, wood, or other deck condition can change the tested system.
- Is the application the same? Adhesive, mechanically attached, or other application details must follow the published assembly and its documents.
- Is the performance adequate? Compare the stated wind-uplift capacity with the project requirement established through the applicable code and design calculations.
If one of those answers is “no,” stop treating the record as a direct match. Ask the manufacturer, evaluator, or design professional for documentation supporting the proposed variation before it is written into the specification or installed.
Does a DORA entry prove code compliance?
No. DORA is a source of tested and evaluated roof-system information; it is not a blanket code-compliance certificate for a building. The project still needs a design that addresses the adopted code, local amendments, exposure and geometry, detailing, materials, installation, and inspection requirements.
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The directory’s connection to IBC Chapter 15 means its test standards are relevant to the code framework described by SPRI. It does not remove the need for the authority having jurisdiction or the responsible design professional to determine whether a selected assembly satisfies the actual project conditions.
Wind uplift is particularly project-specific. The required resistance can depend on building geometry, location, exposure, and edge or corner zones. Use the DORA value as the documented capacity of the listed configuration, then have the project team verify that the design requirement and installation details align.
Why does replacing “listings” with “assemblies” matter?
The change reduces a common source of misunderstanding in roof-system research. “Listing” can sound like a catalog entry for a product. “Assembly” signals that the record describes a tested relationship among components, deck, and application.
That language can improve communication across the project team. A specifier can ask for an assembly that matches the design basis; a contractor can identify whether a proposed substitution changes the tested configuration; and an owner can retain a clearer record of what system was selected. None of those benefits depends on treating the new word as a new technical rating.
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Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What are DORA’s limits?
DORA’s value comes from its defined scope and documentation, so its limits should be explicit:
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- It focuses on the roof-system categories and deck types described by the directory; it is not a universal catalog of all roof assemblies.
- Its principal performance information is wind-uplift capacity for the covered single-ply and modified-bitumen systems.
- A published record represents a particular tested or evaluated configuration. It does not automatically cover a changed deck, component, fastener pattern, adhesive, or installation method.
- Public access to records does not include project-specific engineering, code interpretation, inspection, or construction quality control.
- The terminology announcement explains a clarity improvement; it does not report a new count of assemblies, a percentage increase in approvals, or a change in testing thresholds.
These boundaries make DORA easier to use responsibly. When the database does not answer a project question, the correct next step is to consult the assembly documentation and the professionals responsible for design, code review, and installation—not to infer an answer from the entry title alone.
What should a project file retain after selecting an assembly?
Retain the assembly identifier or record, the specification sheet, relevant test reports or qualified evaluations, the required uplift value, and notes showing how the record matches the project deck and application. Keep the final approved details with the construction documents so that future repairs or reroofing work can be compared with the original system.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallWhen a substitution is considered, retain the request, the comparison with the original assembly, and the written approval or evaluation that supports the change. This creates a traceable record instead of relying on a product name remembered after bidding.
What is the practical takeaway from the 2024 update?
DORA’s “assemblies” terminology is a clearer label for what the directory is intended to provide: documented roof-system configurations supported by third-party testing and review. The service remains a free public resource sponsored by SPRI and administered by Intertek, with information focused on tested single-ply and modified-bitumen systems and reported wind-uplift capacity.
Use the directory to find and organize candidates, then verify the complete configuration against the project’s deck, application, uplift requirement, code obligations, and approved construction documents. The new wording improves clarity, but suitability still depends on the project-specific design and the evidence behind the particular assembly record.
Frequently Asked Questions
Can anyone access the Directory of Roof Assemblies?
Yes. SPRI describes DORA as a free public service, so users can search, view, save, and print records without paying for public access. Professional services such as engineering, inspection, and code review are separate from the directory.
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Does DORA include low-slope commercial roofing systems?
Its described scope covers single-ply and modified-bitumen roof systems and reports wind-uplift capacity for those systems. An IIBEC overview presents it as a resource for low-slope roofing, but the directory should not be assumed to cover every low-slope technology or performance characteristic.
What should I do if my proposed roof differs from a DORA assembly?
Treat the difference as a design change, not an automatic substitution. Compare the changed component or installation method with the published documentation and obtain confirmation from the responsible design professional, manufacturer, or qualified evaluator before approval.
Who should decide whether a DORA assembly meets a building’s requirements?
The project’s responsible design professional and, where applicable, the authority having jurisdiction make that determination. They must account for the adopted code, local conditions, building geometry, required uplift resistance, detailing, and installation—not just the directory entry.
