Roof Inspection types
Roof leaks come in all shapes and sizes. When do roof leaks happen? Roof leaks happen primarily during rain. however, roof leaking can also happen when condensing units on roof decks leak onto the deck. Roof leak water testing is an art, more than anything else. Looking for water on a roof deck takes years o f roofing experience and water intrusion combined. Mazza Testing has both.
First of all, roof leak water testing can be performed in a few different methods. The most commonly used method is the flood test. Although not suggested on extremely new roofs, or large roofs, the test is nevertheless effective. Few things to consider before dumping gallons of water onto a deck. Weight. Thats correct, weight. Water carries with it a weight of approximately 1000 kg/cubic m (62.3 lb per cubic ft) at 22°C (71.6°F) or 1 g/cm2/cm depth (5.19 lbs/ft 2 per in.
Effectively, this translates into load. one thing to consider is the structural stability of the roof deck. Once you’ve overcome this obstacle (confirming if the roof can accept such a test) you can administer the test. When administering this test, the water is suggested to sit for up to 72 hours.
There are two different standards for inspecting and testing roof decks.
- ASTM D7053 – Standard Guide for Determining and Evaluating Causes of Water Leakage of Low-Sloped Roofs
- ASTM 5957 – Standard Guide for Flood Testing Horizontal Waterproofing Installations
The first step in testing. roof is to perform an inspection. this inspection will more or less, determine the capacity of the roof and its ability to withstand the water applied to it. Also, the inspection will document pre existing conditions which may hinder the testing process.
There are times when the inspection is not favorable. As a result, testing cannot be performed.
In Escrow | Homes | Buildings
We perform many roof inspections annually on properties which are in the escrow process. Many of which were pointed out to have issues in a home inspection report. It’s during this time that the buyer of the property gets a first hand look at the roofing system from a professionals perspective.
Our company understands that buyers can be left with thousands of dollars in repairs if the roof inspection is not performed correctly. Roof leak water testing is an option only after the inspection has been performed.
This particular house was a home that was in the escrow process. We were called on this house to perform a quality assurance inspection of the roofing system, parapet walls and decks for water intrusion. During our inspection of the roof we documents a few issues which were obvious. None of these issues were significant enough to prohibit a water test.
We elected to perform a roof flood test in accordance with ASTM 5957, or at least a modified version of it. Respectively, our 5957 test omitted a few key ingredients such as building barriers and the duration of the test. Regardless, the test was confirmed to proceed by all parties involved with limitations.
Our crew set up infrared cameras on the interior of the building to catch any water build-up within the ceiling or leaks, before it got too bad. We use thermal imaging on every single inspection as it is extremely useful in avoiding catastrophic damage.
After seeing the images below… Needless to say, leaks were found in a few areas including the parapet walls. Loose roofing materials was likely the blame for this condition, judging by the proximity of the leaks inside the home.
A secondary issue was discovered during our test. A window leak. As a matter of fact, the window was not necessarily part of the roofing inspection, but due to the obvious flaws in its installation felt compelled to test it. Shocker… It leaked.
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