Snowguard installation and tech tips


Bruin Metal Works' snow guard products are designed to slow or stop the advance of ice and snow from sliding off of metal roofing.  The slope of the roof and amount of ice and snow it is likely to carry will determine the number of snowguards to use.  Most roof manufacturers have established criteria for determining the number of snow guards to use and how to arrange them on the roof.  For general guidelines, see the information below. 

Rules of thumb

  • The greater the pitch the more snowguards you will need.
  • The greater the amount of snow that will accumulate on the roof, the more snowguards you will need until you reach the point of diminishing return.  That would be the point that the weight of the accumulated ice and snow would be dangerous to the structure. 
  • In areas of significant snowfall, it is advisable that snowguards only be placed over entryways.


Some suggestions

  • Stagger the snowguards.  The photo at the top of this page shows a staggered pattern being used. In this instance, the first row of snow guards is positioned approximately six inches from the edge of the roof;  the second row is approximately twelve inches from the edge. 
  • Usually two rows of snowguards will work for a pitch of 1/12 to 5/12.  For 6/12 pitch (which is a 45° slope) and above it is recommended that an additional row of snowguards be added.
  • On runs of 18 feet or more, it is recommended to add a row of snow guards halfway up the run.  This applies to long, steep runs, also.
  • Use clear 50-year silicone caulk on the underside of each snowguard as a seal between the guard and the roofing.  This provides additional protection against leaks and helps to prevent potential dielectric reaction between dissimilar metals.
  • Attach snowguards to roof with appropriate length neoprene washered screws never use nails.  "Snug" up the screw to provide compression to the washer, but do not over-tighten to the point that the washer tears and the roof seam deflects.
  • Attach snowguards through the roof material and into a supportive rafter beneath.  Do not fasten snowguards into the metal roof only or into thin roof sheathing.
For further assistance, please send us an e-mail containing the following information:
  • The slope(s) of the roof section(s) to which you are applying snow guards.  Slope is the rise of the roof over the run.  For example, a roof that gains five feet of height over twelve feet of run would be a 5/12 pitch.
  • The total length of the roof section(s) being treated.
  • The "typical" amount of snow likely to accumulate on your roof based on weather patterns in your area.  For instance, if you routinely receive two 12" snowfalls in a two-week period, that would require more snow guards than an area that gets four 3" snows per season.

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