
Start at the bottom of the walls
Look at the first three feet of siding and the ground-floor glass on whichever elevations face open beds. You will find a band of fine spatter, soil and mulch fines that the rain kicked off the ground and threw sideways at the house. It dries fast and it bonds, worst on the sunny elevations, because the clay fraction in eastern Nebraska soil grips a warm surface and holds on once the water leaves it.
Rinse it while it is fresh, and understand that this advice costs us a call. A hose and an ordinary nozzle takes almost all of it off in the first week and almost none of it after a month of July sun. What will not rinse away is anything driven into a textured surface. Stucco, split-face block and rough-sawn cedar hold the fines down in the profile.









