![]() ![]() Hydrokinetic – When a roof system is hydrokinetic, it means that water is quickly shedding off the roof plane.Here are the definitions of these two terms and how it applies to the pitch or slope of a roof: ![]() When researching low and steep slope roofs, you might come across the terms “hydrokinetic” and “hydrostatic” to describe a roof system. This method is intended to evaluate the water barrier (not water-shedding) of roof systems with a pitch below 3/12. Static water pressure is then applied to the outside face of the roof panel, which tests the roof’s ability as a water barrier. Low-slope metal roof systems are tested to ASTM E2140 standards, a water penetration test evaluating the resistance of roof panels’ vertical seams.ĭuring this test, the roof panel system is completely submerged under six inches of water for approximately six hours. Low-slope and steep-slope roofing systems have different industry standard testing requirements. Testing of Low Slope Metal Roofing Systems If you can’t reach your roof or feel uncomfortable climbing a ladder, don’t hesitate to ask your roofing contractor to do the measurement for you. For example, if your roof rose 8 inches for every 12 inches, the roof pitch is 8/12. Once you reach 12 inches, mark it, and then measure how far the roof rises perpendicular to the ground. Using a measuring device, move inward on the flat roof plane (parallel to the ground) 12 inches. To determine your roof pitch, you’ll need to measure how many inches your roof rises over every 12-inch run. If you’re unsure of what the slope/pitch of a roof structure is, it’s relatively easy to measure. At Sheffield Metals, we also recognize low slope as 3/12 and below. Determining which panel is the right choice for the slope on your project will depend on the manufacturer’s minimum slope factor for that specific panel profile.
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