Roof Cleaning in Rochester, MN

Done Right, Every Time

The dark streaks running down your roof are Gloeocapsa magma — an airborne algae that feeds on the limestone filler inside asphalt shingles. In Minnesota's humid climate it spreads fast, especially on north-facing slopes and shaded roofs. Along with moss and lichen, it holds moisture against your shingles, degrades them prematurely, and can shave years off your roof's life. Some insurance companies even flag heavily streaked roofs at renewal time.

The fix is not pressure. Pressure washing a roof strips granules and voids shingle warranties. Broc's Rub N Scrub uses the soft wash method recommended by shingle manufacturers: a gentle, low-pressure application of a professional cleaning solution that kills the algae, moss, and lichen at the root — then nature's rain rinses the roof clean.

Your streaks disappear, your roof gets a longer life, and your home instantly looks years newer from the curb.