A snow rail (also called snow fence) is used along the perimeter of slate roofs for the prevention of sudden and unexpected ice and snow avalanches, which can damage people, cars, shrubbery and other property underneath. The snow rail system can also include stainless steel expanded metal to prevent slates and other debris from sliding off the roof under the rails and creating a fall hazard. Also, a standard field array of snow guards can be included on the field of the roof above the snow rail for maximum protection.

Snow rail fence brackets are installed parallel to, and approximately 24″ to 36″ from the eaves. The brackets should be spaced from 18-24″ to no more than 42″ – 48″ apart, depending on the pitch of the roof and the expected snow load. It is recommended to use through bolts with a backer plate on the underside of the roof deck. Bronze, brass or stainless steel pipe is recommended, (copper water pipe should not be used). High snow load areas should use a three-pipe system. If a smaller system is used, then it should be supplemented with an additional snow guard array in the field of the roof above the snow rail.

Putting up a snow rail can seem somewhat daunting and can pose as an intimidating project. Fortunately, you have the option of getting it installed by a company, which can save a lot of time and hassle. Local companies across the nation offer this service, but you can still do it yourself if you are careful and read the instructions. Doing some research beforehand is also helpful.

Snow rail bracket systems are a long-term investment and will last for many, many years if you get good quality ones. Tests have shown that some rails can withstand almost 4,000 pounds of direct mechanical force, which means they will not rip out the bolts keeping them attached to the roof. Also, bronze castings don’t crack from age or water damage so you will be able to keep them for a long time.

They aren’t cheap, but you get what you pay for. As well as the railing, you may need stainless steel expanded wire mesh used to keep smaller objects, such as slates, from falling through the rails. These and other snow retention systems are available all over the nation.

If you need a snow rail or other roofing accessory then look online or ask friends for a referral to get the best deals.

Want to find out more about a snow rail, then visit Esme Spence’s site on how to choose the best snow rail for your needs.