Snow Melt Patterns On Roof

On frosty and snowy mornings melt patterns will become readily visible.

Snow melt patterns on roof. If your attic has little or no insulation the snow will disappear quickly. When snow begins to gradually melt off a roof vehicle or other outside structure you might occasionally see some odd patterns develop. The differences from house to house new or old can be very impressive. 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.

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. The patterns relate to attic insulation. As you look at the patterns the mosaic of patterns will show which homes are more air tight and well insulated than others. Winter storm central.

If your attic insulation needs a fix the pattern will be patchy. 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.