Here’s a diagram of a “dual barrier” EIFS wall cross section. Notice there are 4 substrates shown: Concrete, Masonry, Glass Mat Gypsum Board and Cement Board. A Water Penetration Barrier is designed to keep incidental water off the substrate, similar to a building wrap. Unlike a building wrap however, insulation can be adhered using insulation adhesive in drainage channels, to allow incidental water to run down the wall. Because the insulation is not mechanically attached (using screws) — you don’t have anything penetrating through the water barrier. The remaining components are similar to all other synthetic stucco cladding.
To have the EW17 system installed on your home in toronto, visit: stucco toronto and request that Durabond be used as the supplier.