How any coating wears (fails) depends on the coating itself, the substrate it is on and the exposure it faces on a daily basis. One very big advantage of our partially acrylic/urethane, alkyd stain, is the resistance of the stain to darken, as many purely alkyd stains do. This means you can expect many years of wear on shadier exposures, leaving the majority of maintenance to be expected on sun facing sides of a home. Constant sun and water are brutal on any exposure as the combination even will wear rock down over time. Most homeowners should expect to inspect on sun facing exposures every few years, while a properly prepared and applied Envirolast siding stain may last as much as five seasons even on harsh sun facing exposures.