Snow Melt Patterns On Roof

I also see plenty of homes with uneven melt patterns across their roofs and this typically means that there is insulation missing in some of the rafter bays or quite likely an interior wall is coming up to the attic and has no air sealing to stop air from moving into the wall cavity from the house and up to the roof.

Snow melt patterns on roof.

Purchase sidewalk salt also called calcium chloride from your local hardware or big box store. Besides wasted heat melting snow on roofs can mean ice dams where snow melts in a warmer spot on the roof and then freezes when it hits the cold eaves. When snow begins to gradually melt off a roof vehicle or other outside structure you might occasionally see some odd patterns develop. On frosty and snowy mornings melt patterns will become readily visible.

If your attic has little or no insulation the snow will disappear quickly. The patterns relate to attic insulation. The differences from house to house new or old can be very impressive. If your attic insulation needs a fix the pattern will be patchy.

Place this vertically on your roof near the edge so it will melt a section of snow and ice creating an area where the water can leak off. Winter storm central.