What is the advantage of a rain-screen system compared to a sandwich system such as E.I.F.S.?
The Unifix lightweight cement board system for exterior facings is the most conventional rain screen system. It is detached and spaced out from the insulated structure of the building. This spacing permits ventilation, which ensures the following: Evacuation of infiltration water (coming in from the junctions with other materials of different expansions, such as the window frame and door frame, moldings and other facing materials, construction joints, errors in workmanship, etc.). This infiltration is amplified by positive pressure on the wall, created by winds or sudden squalls.
