Direct Answer
ASTM E907 and FM Global Data Sheet 1-52 (FM 1-52) are field evaluation methods used to assess the wind uplift resistance of certain commercial roof assemblies. They help determine whether an installed roofing system can resist specified suction forces that simulate wind trying to lift the roof membrane and its underlying components.
Both methods can use a sealed test chamber placed over the roof surface to create controlled negative pressure. Technicians monitor the roof assembly’s response, including its deflection, as the pressure increases. FM 1-52 also includes a bonded uplift testing method and provides an alternative visual construction observation approach under specified conditions. The methods have different procedures and acceptance criteria, so they should not be treated as interchangeable.
What Does Field Uplift Testing Evaluate?
Wind creates pressure differences that can pull at a low-slope commercial roof, particularly around roof edges, corners, and other exposed areas. Field uplift testing evaluates how the installed assembly responds to controlled uplift forces.
Depending on the assembly, the test can help identify concerns involving:
- Adhesion between the roof membrane and the bonding adhesive.
- Adhesive bonding between roofing layers and the substrate.
- Cohesive failure within the adhesive or substrate.
- Excessive movement or deflection of the roof assembly under test pressure.
- Potential weaknesses that warrant further investigation before the roof is accepted.
ASTM E907 specifically addresses the field testing of adhered roofing membranes. FM 1-52, titled Field Verification of Roof Wind Uplift Resistance, addresses field verification of qualifying above-deck roof assemblies and describes testing as well as visual construction observation options.
How Does the Test Work?
- Define the test requirements. The project specifications, applicable FM 1-52 requirements, roof assembly design, and intended performance criteria determine which procedure and test pressures apply.
- Select the test locations. A qualified testing professional identifies representative locations based on the roof design, assembly, and applicable test method.
- Prepare and seal the test area. A suitable chamber is positioned and sealed against the roof surface so the required negative pressure can be created.
- Apply controlled suction. Vacuum equipment creates negative pressure inside the chamber, simulating uplift forces on the roofing system.
- Measure the roof’s response. The tester records the pressure applied and the assembly’s deflection or other required observations at the specified stages.
- Evaluate the results. Results are assessed against the criteria of the specific test method and the project requirements. A questionable result may require additional investigation, including a roof test cut where appropriate.
- Document the findings. The final report should identify test locations, procedures, pressure levels, observations, results, and any required corrective action.
The exact equipment, pressure increments, test sequence, and acceptance criteria must follow the applicable edition of the governing method. A field test is not simply a general-purpose pressure check that can be interpreted without reference to the roof assembly and its design requirements.
What Is the Difference Between ASTM E907 and FM 1-52?
| Comparison | ASTM E907 | FM 1-52 |
|---|---|---|
| Purpose | Field evaluation of uplift resistance for adhered membrane roofing systems. | Field verification of wind uplift resistance for qualifying above-deck roofing assemblies. |
| Test approach | Uses controlled negative pressure to evaluate the response of an adhered membrane roof system. | Includes negative-pressure testing and a bonded uplift test option, along with visual construction observation guidance. |
| Acceptance criteria | Uses criteria specified by the applicable ASTM method and project requirements. | Uses the procedures and criteria defined in the applicable FM 1-52 edition. |
| Project applicability | May be specified by an owner, designer, or project specification where appropriate. | May be required by FM-related property loss-prevention requirements or specified project criteria. |
ASTM lists an active ASTM E907-25 edition, while older technical publications may describe earlier versions or the standard’s historical withdrawal and reinstatement status. Always identify the edition named in the contract and confirm the governing requirements before testing. FM Global’s Data Sheet 1-52 also has its own revision history; its October 2024 interim revision includes clarifications to deflection evaluation, test cuts, and reporting.
When Is Field Uplift Testing Required?
Testing may be required by project specifications, an owner’s quality assurance program, an applicable insurer’s requirements, or other governing project criteria. FM 1-52 provides recommendations for qualifying new, recovered, or reroofed above-deck assemblies in certain tropical-cyclone-prone areas with design wind speeds of at least 100 mph, subject to stated exceptions and conditions.
Under FM 1-52, visual construction observation can be an alternative to uplift testing in applicable circumstances. Some mechanically fastened roof-cover assemblies installed directly over specified deck types may also qualify for an exception when the required fastener spacing is verified. These provisions are specific to the data sheet and should not be assumed to apply to every roof or project.
Before work begins, the owner, design professional, roofing contractor, and testing provider should agree on:
- Which standard and edition govern the project.
- Whether testing or visual construction observation is required or permitted.
- The roof areas and number of test locations.
- The required design and test pressures and acceptance criteria.
- Who will witness testing, receive the report, and approve corrective work.
- How test openings or damaged areas will be repaired and restored to a watertight condition.
What Happens if a Roof Fails or Produces a Suspect Result?
A failed or suspect test does not automatically mean the entire roof must be replaced. It indicates that the tested area requires evaluation under the governing criteria. The next step depends on the test results, the assembly design, and the observed failure mode.
Potential follow-up actions include:
- Reviewing the test setup, pressure records, deflection measurements, and installation documentation.
- Conducting a roof test cut in a failed or suspect area when required to identify the failure mode.
- Investigating adhesive application, substrate condition, moisture, or other assembly-specific concerns.
- Repairing test areas and correcting identified installation deficiencies.
- Performing additional testing or obtaining design-professional guidance when needed to establish whether the roof meets project requirements.
Test cuts and repairs should be carried out by qualified roofing professionals, with the area restored to a watertight condition. FM 1-52 calls for appropriate documentation of test results or visual construction observations and outlines reporting expectations.
Does Passing a Field Uplift Test Guarantee the Entire Roof Is Windproof?
No. A satisfactory result supports the conclusion that the tested assembly or location met the applicable test criteria under the conditions evaluated. It does not guarantee that every part of the roof will perform identically during every storm.
Field testing has defined limitations. The test locations, roof configuration, installation quality, weathering, maintenance history, and assembly details all affect how results should be interpreted. FM 1-52 also states that its field tests are not applicable to certain roof types, including standing-seam and through-fastened metal panel roofs, ballasted roofs, and mechanically fastened covers with fasteners spaced more than 2 feet apart in either direction.
Testing should supplement—not replace—appropriate design review, installation quality assurance, maintenance, and inspection of the complete roofing system.
What Should a Field Uplift Test Report Include?
Owners and facility managers should request a report detailed enough to verify what was tested and how the findings were evaluated. Depending on the method and project requirements, the report should include:
- Project name, address, date, and testing personnel.
- Roof system description, substrate or deck information, and relevant assembly details.
- The test method and edition used.
- A roof plan or clear record of test locations.
- Applied pressure levels, measured deflections, and test observations.
- Pass, fail, or suspect determinations with the criteria used.
- Photographs, test-cut findings, and corrective actions where applicable.
- Repair details confirming that test areas were restored to a watertight condition.
- Required witness information and distribution of the final report.
Bottom Line
ASTM E907 and FM 1-52 are methods for evaluating wind uplift resistance in qualifying roof assemblies, but they use distinct procedures and acceptance criteria. The right method depends on the project specifications, roof system, applicable insurance or loss-prevention requirements, and governing edition. A qualified testing professional should interpret the results in context and document any follow-up work needed to establish compliance.
Related Questions
- What are fastener pull-out testing requirements for existing decks?
- What is the corner zone enhancement requirement for insulation attachment?
- How is fastener density verified in the field?
- What documentation proves zone-specific fastening was actually installed?
- What is the difference between a seam plate and a barbed plate?
Sources
- ASTM International — ASTM E907-25, Standard Test Method for Field Testing Uplift Resistance of Adhered Membrane Roofing Systems
- FM Global — Property Loss Prevention Data Sheet 1-52, Field Verification of Roof Wind Uplift Resistance
- IIBEC — Technical Advisory on Wind Uplift Resistance Testing of Newly Installed Roof Assemblies
Last reviewed: October 2026
Commercial Skylights & Roof Access
