Element for covering ventilation apertures in roof ridge and arris zones is a sheet of an open-pore foam material with specified pore size and sheet thickness

摘要

The ventilation apertures within corrugated aluminum strips over roof ridge and arris zones are covered with an open-pore foam material with a pore size equivalent to 20-80 pores per inch, and a thickness between 3 and 15 mm, preferably about 5 mm.