The EIFS Drainage System
The Exterior Insulation and Finish System has a particular process that should be used when applying to a residential project. The Water Drainage System was designed to apply over OSB. The process is as follows. First if the home is new construction you will want to get your EIFS applicator in there before the windows go in. A fluid air/water barrier should be painted over the OSB with 4 inch sheathing fabric over the seams, or apply stucco wrap by stapling to the OSB (A fluid air and water barrier is proven to be a better barrier). The windows should be trimmed with flashing tape. The flashing tape should come down over the Stucco wrap. Now the windows can go in. If the windows are already in then the flashing tape should but up to the window and overlap the stucco wrap. The next consideration is to find the grade and make sure to install the track 8 inches above grade. The stucco wrap should drop right into the track. This track is where your first row of foam will go. It is always a good practice to install your track above the windows at this time as well. Your next step is to find all areas that the roof dies into the wall. At these locations you will have to peel up the existing flashing and shingles for about 12 inches and slide a kick-out flashing up under there and fasten it to the wall. Make sure to put the kick-out flashing under the stucco wrap. Now you will want to back-wrap around the windows and doors and along the roof line. Make sure to stay 2 inches off the roof line. With all your prep work done you are ready to stick your foam. It is recommended to use the ribbed foam for the Water Drainage System. When fastening the foam two inch plastic mechanical washers are used. The foam is applied horizontally as to keep the ribs facing the proper direction for water drainage. The foam will be sanded and base coat and finish applied as normal from this point.