Using DORA® For Your Next Roofing Project

By Brian Davis 03-01-2022
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Specifying the right materials and assemblies for a low-slope roof system to satisfy a building's specific performance and safety requirements can be challenging. Even with design considerations in place, existing resources for finding applicable roof assemblies are limited in scope, functionality, and can feel disconnected. This is where the Directory of Roof Assemblies (DORA®) can help!

What is DORA®?

DORA® is a web application database of single-ply and modified bitumen roof systems tested in accordance with standards referenced in Chapter15 of the International Building Code for wind resistance. DORA® lists wind uplift load capacity for single-ply and certain modified bitumen roof systems.

Launched in 2018, this service was developed to be easily used by design professionals, roof consultants, code officials and other interested parties. Assemblies may be easily searched, viewed, saved, and printed. DORA® is sponsored by SPRI and administered by Intertek. This listing service is free to the public. The DORA® website can be found here at


DORA® is the newest listing service to be included in MasterSpec® and features results for single-ply and modified bitumen roof systems that other listing services may not capture.

For example, roof decks and constructions that may not be available in other directories such as wood, gypsum, cementitious wood fiber, and panelized concrete roof decks. Also included are steel deck listings that are not span-limited.

Some additional features of DORA® include:

  • Independent 3rd party listing verification

    • Data submitted by participating companies along with supporting documentation validated and verified by independent 3rd party agencies

    • Assemblies stay up to date with scheduled verification and review

    • Revision date and all historical versions are retained

  • Innovative Searching

    • Smarter tools to find the assembly you need

    • Utilization of latest advancements in user-friendly search technology

    • Designed to be mobile-friendly

    • Real-time listing counter broken out by Listing Owner

  • Project Library

    • Allows the user to manage projects, assign DORA® assemblies, store documentation, collaborate, and share with your team

  • Saved Searches and Notifications

    • Save a search and get notifications for new assemblies meeting its criteria

    • Assemblies may be viewed, downloaded, printed, and stored

    • Ability to request an assembly that is not listed

How Does DORA® Work?

DORA® is the voluntary participation of industry companies. Roof assemblies are submitted by participating companies and are accompanied by supporting documentation in the form of test reports and qualified evaluations.

DORA® accepts supporting documentation from qualified accredited laboratories and certification bodies. All roof assembly submissions are reviewed and independently verified by the Program Administrator at Intertek before being published on the DORA® database.

Creating a user account is highly recommended, but not required. Without an account, previous searches will not be available to review.


Depending on the assembly you are trying to find, there are a few ways to search. For example, if you know the Listing Owner you want to use, you can narrow your search to only that manufacturer's assemblies listed (Fig. 1).


Figure 1: Listing Owner search

You can also filter your search by roof application, deck type, covering type, wind performance, etc. until you find assemblies that best fit your project specifications. In this example, the search results were narrowed down by choosing a GAF TPO membrane that was adhered-attached to a ⅜" minimum wood deck in a re-roofing application using a tested wind uplift load capacity >90 psf (Fig. 2).

Figure 2: Filtered search

By inputting your assembly specifications, the search field was narrowed down from 692 GAF TPO listings to only 10. The number of listings found is shown in the upper right corner of Figure 2. Users can find additional information about those 10 Listings by continuing to the next screens (Fig. 3). As you can see, this easy-to-use filtering feature saves tons of time and makes your searching a lot easier and efficient.

Figure 3: Search results

Now, all that's left is to choose the listing that fits best for your project requirements and specifications. With multiple options to either print preview, export to PDF or create a spec sheet, DORA® makes generating your assembly specification quick and hassle-free (Fig. 4). You can now save your roof listing documentation, collaborate, and share with your team.

Figure 4: Listing downloading options


Your search just got easier. With over 900 GAF listings in DORA®, chances are you will find the right assembly for your next roofing project.

Features such as innovative searching, an extensive project library, and unique roof decks and constructions not available in other directories make DORA® an easy to use resource for finding wind tested systems.

Brian Davis is the Director of Innovation Support Services at GAF. He has been with GAF for 15 years working closely with both of GAF's commercial and residential business segments. Brian has helped advance GAF's technical literature and support materials with a new focus on innovation and growth.

Brian is an associate AIA member, LEED AP, and a Green Roof Professional. He is an active member of AIA, ARMA, IIBEC, NRCA, RICOWI and SPRI. Brian holds a Bachelor's Degree in Architectural Engineering from Alfred State University.
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