ASTM D7053 | Los Angeles Roof Inspection Leak Testing

Los Angeles Roof Inspection Leak Testing
Many buildings, particularly Los Angeles commercial buildings, favor low-slope roofing. It certainly offers advantages. For example, it allows you to place crucial equipment on the roof itself, such as HVAC equipment. The ASTM D7053 Los Angeles Roof Inspection Leak Testing standard helps source roof leak issues.

Which in turn, frees up space inside the building for additional storage or even office space depending on the building designs. Furthermore, it also facilitates solar panel technology in areas where solar installation makes sense.

A low-slope approach is less material-intensive than comparable steep-slope roofing. Which overall, it makes low sloped roofing a more cost-effective strategy for large buildings.

D7053/D7053M – 17 Standard Guide for Determining and Evaluating Causes of Water Leakage of Low-Sloped Roofs

Of course, low-slope roofing isn’t without its pitfalls. Unlike steep-slope roofing, debris is likely to sit on the roof or be knocked around by gusting winds. Low-slope roofing also lends itself to areas of standing water.

Both the debris and standing water can create leaks in the roofing if they aren’t attended to promptly. This is a more common situation than most building owners would like to imagine, as maintenance teams prioritize internal needs over roof maintenance.

If you suspect your Los Angeles are based building’s roof is the cause of leaks or water damage, our Testing can help you verify if that’s the case with water intrusion testing.

Roofing Defined

Los Angeles Roof Inspection Leak Testing

For the purposes of the test process described below, the ASTM D7053 Los Angeles Roof Inspection Leak Testing standard sets out the following definition of a roof: “A roof is considered an assembly including the membrane, insulation, vapor retarder (if required), deck, and structural components.”

Preliminary Assessment

Before we conduct any formal testing on your roof, we’ll gather a substantial amount of preliminary information to guide our testing process. This preliminary assessment for ASTM D7053 Los Angeles Roof Inspection Leak Testing happens in three main sub-stages.

Document Review

Before any of our equipment arrives on a construction site, a series of interrogatories must be completed. These documents can include engineering reports, architectural drawings, test reports, and revisions to any or all of these documents.

Depending on the quality of your record-keeping, these documents may also include product documents that specify projected useful life, tolerances, and other information from the manufacturer. We review all of this information to help establish what the intended baseline performance of the materials should be.

Design Concept Review

Los Angeles Roof Inspection Leak Testing

Next, WIS undertakes a design concept review of the roof itself. The function of this step is to look at the materials the design calls for and evaluate it for weaknesses.

For example, certain materials don’t always work well together and can lead to leaks down the road. Unfortunately, it often takes years before these weaknesses become known.

The final design may contain other weaknesses that don’t fully account for issues like building movement over time. The design concept review should also expose these inconsistencies if they exist.

Service History

Finally, we’ll undertake a review of the service history, as far as existing records will allow for it. This aspect of the preliminary assessment can prove time-consuming depending on the extent of service records and the age of the building.

Additionally, we will look over any documentation related to previous roof-related work and potentially any leak related work. We’re also likely to conduct interviews with building maintenance staff about their roof-related maintenance routines and any previous leaks.

Actually, we’re trying to determine both the full extent, cause, and frequency of any prior roof-related leaks, as these often prove the best starting points for later investigation and testing.

Lastly, we take the information we gather from documentation and interviews and try to establish the weather patterns at the time of the leaks. Excessively harsh or violent storms can sometimes exceed the tolerances of a roof or its materials. Wind direction and speed can also contribute to certain types of roof leaks.

Primary Investigation and Testing

After concluding the preliminary work, we move on to the primary investigation and testing. This portion of the process typically happens in three sub-stages.


The inspection sub-stage primarily involves visual observations meant to establish the current condition of the roof overall, flashing, and any “interfaces between roof and wall, or roof and eave.” We also look for visual clues that indicate the presence of recent or ongoing leaks.

Water Intrusion Specialists Testing Agency also looks for a variety of other common problems, such as:

  • Material deterioration
  • Wear and tear damage
  • Membrane delamination
  • Freeze-thaw damage
  • Impact damage

This visual inspection often helps to narrow down the most likely leak points or even identify the primary leak point. Moisture meters are used to help assess baseline moisture across the roof.

Water Intrusion Specialists Testing Agency may also employ infrared thermography as part of the inspection. It’s a non-invasive approach that can help reveal high-moisture areas around your roof that can indicate leaks not observable to the naked eye.

In some cases, we may also need to cut inspection openings in the roof itself. These inspection openings allow for a layer-by-layer view of any potential damage to the roof materials and can help trace leak paths.

Inspection openings can cause permanent destruction to the layers at the opening site. We seek permission before creating any such openings since they may require spot repairs from a qualified roofer or contractor afterward.

Los Angeles Roof Inspection Leak Investigative Testing

The investigative testing sub-stage primarily serves as a method for temporarily recreating leak conditions in your roof. This typically calls for exposing suspect areas to different types of water and pressure.
Los Angeles Roof Inspection Leak Testing

For example, we may replicate water flow or ponding on the roof to see if it triggers a repeat of the leak. We may also use high-pressure water (within roof tolerances) to replicate wind-driven leaks.

As far as possible, we try to expose the smallest possible roof area to water, as it lets us more precisely isolate water entry points.


Analysis happens both during and after testing. Information gathered during the testing can cause us to modify or abandon a specific technique in favor of ones more likely to show results or narrow leak causes.

The post-test analysis attempts to eliminate any ambiguity, gut-reaction conclusions, or conflicting data. Moreover, we’ll attempt to match up the data we gather with reports about the position and extent of the reported leaks.


Once we finish up both the preliminary assessment and the testing stages, we compile all of the information into a report.

The report will include information about the service history, observations from the inspection, test methodology, and test results. Included also are photographs used as supporting evidence for the conclusions.
Los Angeles Roof Inspection Leak Testing

In other words, our photos will include marks or identification cards that let you pinpoint where on the roof the photo was taken. The report may also include suggestions for possible repairs or the scope of repair required to resolve the leak. ASTM D7053 | Los Angeles Roof Inspection Leak Testing is exhaustive and therefore needs to be thoroughly documented.


As noted in the standard, the ASTM D7053 Los Angeles Roof Inspection Leak Testing procedure excludes several roofing types. Including, steep-sloped roofs, standing or flat seam metal roofs, or architectural standing seam metal roofs.

This testing procedure excludes condensation-based moisture issues. These issues arise from a complex set of factors that happen inside the building.
The above testing procedure specifically addresses water intrusions from outside the building. Testing for condensation-based issues requires a different and substantially more complex procedure.

Parting Thoughts

Low-slope roofing provides a number of benefits for Los Angeles commercial building construction, such as cost savings, space for HVAC equipment, and facilitating solar technology.

For this reason, these roof types creates some pitfalls. Water can pool on the roof. Detritus can sit or blow around on the roof. Both of these scenarios can cause leaks without prompt and proper maintenance routines.

If you suspect your low-slope roof is responsible for leak damage inside the building, contact WIS at 626-235-0511 or by email at to schedule your roof leak test.

We perform other tests such as fenestration, forensic water intrusion testing, masonry wall testing, shower pan testing, leaking wall tests, sub-grade and concrete water intrusion tests just to name a few.

Note: Unless otherwise noted, Water Intrusion Specialists Testing Agency follows the procedures set forth in the ASTM International D7053/D7053M  Standard.  Deviations from the established procedures will be discussed ahead of time and the reason for the deviation will be included in the final report.

ASTM D7053 | Los Angeles Roof Inspection Leak Testing
ASTM D7053 | Los Angeles Roof Inspection Leak Testing
If you suspect your Los Angeles are based building’s roof is the cause of leaks or water damage, Mazza Testing can help you verify if that’s the case with water intrusion testing.
water intrusion specialist
The Logo