Leaky Ridge Vents To the Editor: A recent storm has caused the kind of leaks that occur once or twice a decade. At a house under construction, the wind blew powdery snow into the ridge vent [a low-profile plastic type]. The melted snow leaked through the insulation and Sheetrock and onto the floor below (see illustration). The Sheetrock had been hung, but not taped. The water on the floor was in a line below the ridge. Afterwards, the builder I am working with laid 6-mil poly on top of the insulation and collar ties, and attached it to the underside of the rafters with furring strips. The theory is that this will collect moisture [if the vent leaks again]