The pictures here show the damage done by backflow from the LeafGuard gutter system. The fascia behind the LeafGuard was completely rotted and had to be replaced. Backflow occurs when the precipitation hits the solid lid of LeafGuard and instead of it draining into the reverse curve system, the water drains behind the system and causes the fascia board to rot. For these homeowners the old gutters system was removed, all rotten fascia was replaced, and new gutters with the MasterShield HydroVortex technology. The homeowners now have peace of mind knowing that the gutter system installed on their home won't cause any damage.