By now many of you have read or heard through the grapevine that I have retired from the solar industry. To be clear, I have retired from the “solar industry” but am far from retired. My energies will now focus on family, fun, and Alpine SnowGuards. As such, I plan to do a blog series that focuses on snow guards. If any of you have questions along the way, please feel to submit them in the comments, or email me directly at firstname.lastname@example.org. Roofing questions are open for discussion.
So, let’s get started….
What is a snow guard?
Back in the year 2000 we defined a snow guard as a device that is mounted to a sloped roof surface to prevent a potentially damaging single release of snow and ice from that sloped roof (similar to an avalanche of snow on a mountainside). Snow or freezing rain accumulates on a sloped roof surface, and as heat from the building and/or exterior temperatures rise above freezing, a film of water develops between the roof surface and the snow and ice. This water functions like a lubricant, making the roof surface almost frictionless.
Snow guards help prevent damage to:
- Gutters, vents, lower roofs & mechanicals
- Windows & skylights
- Walkways, landscaping, people & vehicles
However, as with all progressive business evolution, the definition has evolved and expanded. A snow guard is a device mounted to a structure which is intended to manage the sudden movement of snow and ice.
- PD10 Pad-Style Snow Guards in Copper
Goldwyn-Smith Hall at Cornell University, Ithaca, NY
Image from Charles F. Evans Company, Inc., Elmira, NY
- PP225 Three-Pipe Height Adjustable Snow Guards in Brass
(Left side of roof: New snow guard installation, brass / Right side of roof: Prior snow guard installation, patinaed)
Benjamin Franklin College at Yale University, New Haven, CT
Image from Titan Roofing, Springfield, MA
- PP115 Pipe-Style Snow Guards in Mill Finish
Camden Yards, Baltimore, MD
- SnowMax Fence-Style Snow Retention System
Cleveland County Courthouse, Norman, OK
Image from Valor Systems, Norman, OK
Add in evolving construction materials and processes like solar panels, composite cornices on high rise buildings, synthetic roof shingles (non-porous plastics), evoking building codes intended to minimize shading on city streets but are in actuality creating ice accretion surfaces. Solar SnowMax and the new for 2019 Alpine LedgeGuard were both designed with a specific purpose in mind – managing snow.
- Solar SnowMax-R2 with Black Color Insert Strip
Image from NRG Home Solar, Long Island, NY
- Alpine LedgeGuard – Engineered to mitigate falling ice and snow from ledges, cornices, parapets. sloped walls and more
Generally speaking, a snow guard or snow and ice retention system is designed to add friction to an otherwise frictionless surface (friction will change as temperatures, mass, and added “melt” interact with the structural surface.)
There are a variety of shapes, styles and materials used to accomplish the end goal of adding friction. In my experience, most snow retention devices will accomplish the “expected results” if used properly. The key is understanding and managing customer expectations when selling and installing snow management systems.
President & Founder, Alpine SnowGuards
We keep snow in its place
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Alpine SnowGuards designs, engineers, and manufactures snow management systems from our facilities in Morrisville, VT. We work closely with leading roofing contractors, engineering firms, developers, and roofing manufacturers to ensure we deliver quality products that do what we say they’ll do. Alpine SnowGuards can help a building qualify for LEED® credits.