Fig-1: BEFORE -Is snow covering your roof drains? This drain is revealed by a ghostly expression in the snow surface. A scupper in the parapet wall is also hidden by the snow increasing risk of ice-damming. Now imagine the snow 30" deep rather than 8" deep as shown here.
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Fig-2: AFTER - Please compare to Fig-1. This drain has the 6RDDJ22 cable jig with GC1/MSG1 Contoller. The GC1/MSG1 require freezing ambient T-degF plus the presense of moisture to operate de-icing. Heat trace cable at top left goes to heat second nearby drain.
Fig-3 AFTER -Please compare to Fig-1. In this photo a 4RDDJ22 jig is keeping a canale/ scupper free of ice for water drainage through a parapet wall. Notice that the heat trace cable is channeling water between drains as well.
Fig-4 Notice that this jig has been field modified by shortening three 3625R14 rays to accommodate the nearby parapet walls.
Where is the drain in Fig-1? Imagine a vertical line at about 1/3 the photo width from Left to Right. Then intersect the photo with a horizontal line at about 1/2 the photo height. Near that cross-section you should see the drain dome expression in the snow surface.
Our mission is to provide solutions. We address the problems that arise from Roof Ice Damming that cause Roof Flooding. Our customers value our responsive service and our insight into their roof snow and ice melting problems. Our business is located in the heart of Denver, Colorado at 121 Mariposa St, 80223.
Fig-1: BEFORE -Is snow covering your roof drains? This drain is revealed by a ghostly expression in the snow surface. A scupper in the parapet wall is also hidden by the snow increasing risk of ice-damming. Now imagine the snow 30" deep rather than 8" deep as shown here. 
Fig-2: AFTER - Please compare to Fig-1. This drain has the 6RDDJ22 cable jig with GC1/MSG1 Contoller. The GC1/MSG1 require freezing ambient T-degF plus the presense of moisture to operate de-icing. Heat trace cable at top left goes to heat second nearby drain.
Fig-3 AFTER -Please compare to Fig-1. In this photo a 4RDDJ22 jig is keeping a canale/ scupper free of ice for water drainage through a parapet wall. Notice that the heat trace cable is channeling water between drains as well. 
Fig-4 Notice that this jig has been field modified by shortening three 3625R14 rays to accommodate the nearby parapet walls.