The exterior of fiberboards includes a foil covering that serves as both an air and moisture barrier. By themselves, fiberboard ducts are fantastic insulators and don't call for any further insulation. In the meantime, sealing ductwork with mastic or specialized tape stops air leaks, making certain that every little bit https://flexibleductingpu41593.thelateblog.com/35935786/pu-ducts-can-be-fun-for-anyone