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Metal Roofing

R-Mer® Span

  • Moisture Resistant
  • Weathertight
  • Winter Weather and Flash Flooding Resistant

R-Mer Span is a structural standing seam roof system. R-Mer Span consists of a unique profile containing mesas throughout the panel to minimize “oil canning.” The 2 3/8” high vertical seam makes R-Mer Span aesthetically pleasing and the ideal roof system to withstand severe weather conditions. The heavy-duty continuous clip allows for unlimited expansion and contraction. R-Mer Span can be used on slopes down to 1/4” per foot for retrofit and/or new construction.

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Product Specifications


Product Page Feature Photos

Moisture Resistant

ASTME E 1646 testing offers a gauge to confirm how moisture-resistant a panel seam will be in high wind conditions. The key is testing to 20 psf of pressure is a realistic and common pressure roofs will experience. Most manufacturers only test to 15 psf. or lower.

Sun beam in Dark Clouds and Sky before Thunderstorm


Specifically developed to gauge a metal roofing system's ability to remain weathertight under adverse weather conditions and wind-driven moisture. System details such as valleys are incorporated into the testing specimen to confirm the total performance of the roof system.

Product Page Feature Photos

Winter Weather & Flash Flooding Resistant

ASTM E 2140 & TAS 114-95 testing was specifically developed to gauge a metal roofing system's ability to withstand winter weather and flash flooding. What is an acceptable degree of performance or system leakage? This test confirms that the level of acceptable failure is absolutely zero. This is the only testing that simulates seam submersion under snow melt. This test is mandatory to measure true roof performance in northern climates.

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RMer Span Curve Panels are being installed onto the North County Regional Library