Metal roof installation specifications

The edges are then sealed with closely spaced fasteners. This pass or fail test is done in three UL sequences and then turns into a UL if it can go beyond Class 90 and tests until the system fails:. The test consists of six separate preload pressures three complete cycles of preload pressures all at a specific pressure in PSF , followed by measurement of the air infiltration and air exfiltration through the panel, which is measured in cubic feet per minute CFM.

Based on the measurement collected in the final two steps, you will be able to determine the rate at which air is expected to leak through properly installed panels. This is another pass or fail test. According to the scope of the standards :. It does not include leakage at openings or perimeter or any other details. After the pre-determined air pressure is reached, water is sprayed on the panels for a duration of 15 minutes. The amount of ponded water is determined and then the amount of water infiltration through the tested panel is measured.

ASTM E is another water penetration test evaluating the resistance of roof panels, sideseams, endlaps, and roof plane penetrations to water submersion.

During this test, the roof panel system is completely submerged under water to test its ability as a water barrier. This test method is intended to evaluate water-barrier not water-shedding roof system joints and details. They are applicable to roof coverings intended for installation on either combustible or noncombustible roof decks when the roof coverings are applied as intended.

Most, if not all, metal roofing and wall systems are Class A fire-rated and noncombustible, making it the most resistant to catching on fire. Four steel balls of different sizes are dropped from varying heights onto the metal panels see photo for parameters. The panels are then evaluated to see if punctures or other failures have occurred.

Rating is determined on a scale from Class 1 to 4, with Class 4 being the toughest and least likely to fail when in contact with objects. Metal roofing paint systems come with their own standards and testing to ensure success of a paint system. Metal roofing paint systems endure stringent testing, like the natural outdoor exposure test in the photo, to ensure the paint system stands up to chalking, fading, chipping, peeling, and other overall failures.

All of these tests are why many paint manufacturers guarantee their Kynar or Hylar products with lengthy metal roofing and wall system paint warranties.

Remember, there are many other standards, tests, codes, and regional requirements that apply to metal roofing and wall systems.

But the ones we outlined are a good representation of common standards and testing that currently exist in the industry. At Sheffield Metals, we know how important it is to maintain customer trust, part of which comes from being able to talk through and explain how their metal roof will perform in certain situations. Get ahead of these questions and contact us today to speak with one of our technical representatives.

By: Julianne Calapa Posted on February 21, We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Close Privacy Overview This website uses cookies to improve your experience while you navigate through the website.

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