Window Rain Leak Water Testing | Los Angeles

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Window Rain Leak Water Testing | Los Angeles

In the world of water intrusion testing and Window Rain Leak Detection, it’s really both an art and a science. Understanding how water moves through a building is key to being a successful window rain leak water testing agency. So in this business, there’s a huge disconnect as to what water testing is. As a matter of fact, most people think we just use a water hose. Unfortunately, that’s not the case. Water testing should be performed in accordance with a standard. Why? Couple reasons really.

  1. If you’re testing for any litigation you will need a standardized test, laboratory trained personnel, and calibrated test equipment traceable to Accredited Testing Labs.
  2. When performing diagnostic troubleshooting there must be a systematic approach to sourcing water intrusion
Stucco cracks wall water leak and water intrusion testing

Water Intrusion Testing | Stucco Wall Cracks and Los Angeles

Window water leak testing in Los Angeles and Greater LA

We received a call from this homeowner who claimed that they had water pooling under the windows after it rains. Fortunately, our client had pictures and video which documented these occurrences and was able to provide insight into what was occuring.

Upon visiting the home, analyzing the issues, we determined that the window leak test needed was the ASTM E1105 to simulate a wind-driven rain event. Similarly, the ASTM 511-08 test could have been implemented however, we felt the ASTM E1105 test would be simple enough to gain further insight into what was happening.

Besides, the removal of the interior and exterior finishes would be necessary regardless and we weren’t doing a sill dam test. We performed isolation testing here for both the right side upper and lower windows. In the end, it was the installation that was creating the water leaks.



Rain Leaks in Los Angeles are actually pretty common

Believe it or not, rain leaks are quite common here in Los Angeles. We think it doesn’t rain enough, but really it doesn’t take much. On the other hand, there are those window leaks that take some time to procure. Depending on the item tested, there must be a process by which window water testing should be performed.

Is the leak the window or is the leaking coming from the installation?

These are the questions we as water intrusion specialists must address. As a result, the company you choose for your window rain leak detection service must know what they are doing.

Water testing with a water hose?

Seriously? Nobody in this business who are professional water intrusion experts test with a water hose. For one thing, there is a chance you can literally overtest a system. Thus, creating a leak that was never there. Is that really a thing? You bet. Standards like the ASTM E1105, AAMA 501AAMA 502, or ASTM 511-08 dictate the test procedure and ensure that overtesting a window system doesn’t happen.


If you see a water intrusion so-called “expert” attempt to perform testing with just a water hose… just say no thanks. And proceed to call the water intrusion specialists.

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