It is highly recommended that whichever snow retention device you specify for installation on your metal roof you select one that wonвЂ™t penetrate the roof deck. For this reason snow retention devices are usually installed in multiple rows in concentrated areas at the eave end of the roof. those with the greatest shear and tensile strength lie at the base toward the downslope end of the snow bank. Snow banks on roofs are known to densify in wedge patterns so as the layers begin to thaw and the snow bank compacts from its own weight, the densest layers i.e. The primary function of all snow retention devices is to restrain movement of a bank of snow by restraining its base. Both styles of snow retention devices have been known to perform well when installed properly. Snow guards may be repeated in specific patterns progressing up the slope of the roof, but also with greater concentration near the eaves. Snow guards are small individual devices generally spot located and installed at or near the eave. Depending on the specific project conditions these devices may need to be repeated in multiple rows up the slope of the roof, but always with greater concentration near the eave area.ДЄ second method of snow retention is a snow guard. These fence assemblies are usually installed at or near the eaves. They are designed to hold rooftop snow accumulations in place and keep them from sliding dangerously off the roof and causing damage or injury. These are horizontal components, installed laterally in a continuous manner across the expanse of the roof. There are two primary types of snow retention products that are most commonly specified by architects to keep snow loads and accumulations safely in checks. When considering snow retention solutions for any roof structure the very first step is to determine the loads that will need to be held in place by the snow retention system.ДЄrchitects then should consider what types of snow retention options will be the best solution for a particular project and they should be keenly aware of the testing parameters, results and ratings of the products they are specifying. In addition, snow shedding from a roof can also damage landscaping, parked vehicles, lower or adjacent roof sections and even the paint finish of the standing seam metal roof itself. Injuries and even fatalities have resulted from falling snow and ice from roofs. Frozen snow sliding off of roofs is serious business!

Metal roof snow guard bars