The function of the snow stopper is to limit the snow and ice from sliding on sloping roof surfaces and it is a good supplement to the regular snow fence. They distribute the snow load over the entire roof and keep the snow in place until it melts or the roof can be shovelled.
Upon the installation of a snow stopper and/or snow fence, it is of the utmost importance to adapt the amount to the actual geographic location, amount of precipitation and the design of the roof. Remember that so-called snow pockets can form. This is where more snow ends up and then an extra snow fence or snow stopper is needed to keep the snow in place.
When there is a risk of overloading the snow fence and the roof, the roof must be shovelled in order to prevent damages to the roof, as well as accidents.
As opposed to the snow fence, the snow stopper is not approved for anchoring personal fall protection.