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Word of the Week: What is Non-Penetrating Rooftop Mounting?

Posted by Kimberly Reichert on Feb 6, 2019 9:16:26 AM

Non-penetrating rooftop mounting refers to the ability to mechanically attach a clamp to a standing seam roof by gripping the seam in such a way that there is no penetration to the panel material. The best method for standing seam clamp attachment is via round-point setscrews

Using cup-point setscrews is ill-advised as such a screw point cuts through the paint and protective coating of standing seam panels, causing corrosion and voiding warranties.

In the metal roofing construction industry, mounting ancillary items is often a convenient and necessary aspect of desired performance. Obviously, the best way to maintain the integrity of a metal roof is to allow it to function only as a roof. But various rooftop utilities such as, HVAC, piping, walkways, vents, satellite dishes, snow retention, solar arrays, signage, fall protection, lightning protection, etc. all serve critical purposes and must attach to the roof.

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Tags: metal roofing, S5 clamps, metal roof clamps, roof panels, exposed fastener, Brackets, Roof Clamps, metal roofs, metal roof clips, thermal movement, snow clips, snow stopper, snow bar, snow rails, snow fence, standing seam metal roof, plastic snow guards, Snow stops, Snow Guards, sliding snow, snow retention, FAQ, metal roof snow stops, rooftop avalanche, solar PV, non-penetrating, rooftop mounting, cup point setscrews, round point setscrews, corrosion, thermal cycling, weather proofing, rooftop utilities, rooftop equipment, violated warranties, maintain warranties, dimple, maintain roof warranty, mechanical compression, non-corrosive, aluminum, stainless steel, load tested, holding strength, in-service load

Word of the Week: What is a Rooftop Avalanche? [video]

Posted by Kimberly Reichert on Jan 30, 2019 11:17:24 AM

It is a sudden release of snow off a rooftop. Falling snow forms a temperature-sensitive bond to the surface of a metal roof. As that roof is warmed, (through sun or building heat loss), the bond with the snow is broken and a thin film of melt water lubricates the roof. This sudden release from a rooftop can dump many tons of snow below the eaves in a matter of seconds, endangering building elements, landscape, vehicles and pedestrians.

Qualifying Snow Retention Systems for Metal Roofing, from the Metal Construction Association discusses the rooftop avalanche in the following terms:

Metal roofs provide durable, long-term solutions and have been preferred by many for use in challenging northern and alpine climates where snow and its migration on and from the rooftop is a normal occurrence. Such climates can pose unique challenges for any roof. Pitched roofs of a material that has a slippery surface can pose sliding snow and ice hazards below eaves. In many instances, snow retention systems are installed on these roof types in order to reduce the risk of sudden rooftop avalanche and mitigate the hazards present in the discharge areas below the eaves.

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Tags: metal roofing, S5 clamps, metal roof clamps, roof panels, exposed fastener, Brackets, Roof Clamps, metal roofs, metal roof clips, thermal movement, snow clips, snow stopper, snow bar, snow rails, snow fence, standing seam metal roof, plastic snow guards, Snow stops, Snow Guards, sliding snow, snow retention, FAQ, metal roof snow stops, rooftop avalanche