Normal flashing is held in place manually, then nailed into its final position. Any shift of the material during this stage can create gaps that allow water to seep in.
Self-adhering flashing has a peel-and-stick adhesive backing. To install, workers ensure that the area designated for install is clean and dry. Then, they trim the flashing to fit, remove the backing, and press the flashing into place, smoothing it down and applying pressure to make sure that there is even contact in all areas.
This process is faster and easier than nailing, which means that installation takes less time and the contractor can move on to the next phase of the project more quickly. And because there are no fasteners involved, there are no penetrations in the surface for water to infiltrate, which means that the installation will last longer.
Self-adhesive flashing can be installed anywhere traditional flashing is used on the building wall. This includes around windows and doorways, under eaves, and around any vents or other penetrations in the exterior.