It’s the nature of physics: Building materials expand in the heat and contract in the cold. With the polar vortex winter cold, wood, concrete, steel and other materials are shrinking even more than during a typical winter. So what does this mean for the roofing system and in particular skylights?
How Winter Cold Affects Skylights
The materials on your roof are contracting in winter cold, but the skylight is a set size. Unless the skylight was properly installed with adequate sealing and flashing, winter contraction sets the stage for the skylight to leak. As winter snow melts, water can seep in around the seal, which may have ruptured with the shifting and contracting of building materials. […]