Soft Wash Roof Cleaning in Woodstock & North Georgia

Those dark streaks running down your shingles aren't dirt, and they won't rinse off in a storm. They're Gloeocapsa magma — an airborne algae that feeds on the limestone filler inside asphalt shingles. It loves Georgia humidity, takes hold first on shaded and north-facing slopes, and spreads across the roof one wet season at a time. On heavily wooded lots, moss and lichen usually aren't far behind.

Redline Exterior Cleaning treats roofs the way shingle manufacturers say they should be treated: with a low-pressure soft wash, never a pressure washer. The treatment is applied carefully from safe positions, kills the growth at its source, and lets streaks fade instead of blasting granules off your shingles. It's a calmer, smarter way to get your roofline back — and it starts with a free estimate from a firefighter-owned company based right here in Woodstock.

Problems This Service Solves

• Black Algae Streaks

  Gloeocapsa magma feeds on the limestone in asphalt shingles, leaving dark vertical streaks that widen each year in our humid climate.

• Moss on Shaded Slopes

  Tree canopy keeps shingles damp long after rain. Moss takes root, holds moisture against the roof, and can lift shingle edges as it thickens.

• Lichen That Won't Let Go

  Lichen anchors itself into the shingle surface. Scraping or picking it off by hand pulls protective granules away with it.

• A Roof That Ages the Whole House

  A streaked, mottled roof makes even a freshly washed home look tired — and it's one of the first things buyers and inspectors notice.

Surfaces We Handle

• Asphalt shingle roofs
• Architectural shingle roofs
• Metal roofing
• Concrete & clay tile (selected)
• Low-slope & porch roofs
• Dormers, valleys & steep sections
• Skylights & roof vents

Our Method: Soft Wash Only, Never Pressure

We never put a pressure washer on a roof — and neither should anyone else. Shingle manufacturers specifically warn against pressure washing because high pressure strips away the granules that shield the asphalt underneath. Our roof treatment goes on at low pressure, closer to a heavy rain than a power washer, so the cleaning solution does the work instead of force.

The solution is applied methodically from ladders, roof edges, and other safe positions, then given time to dwell so it kills algae, moss, and lichen at the root. Black streaks usually respond quickly; moss and lichen die off first and release from the shingles gradually with weather over the following weeks. Before anything touches the roof, we pre-wet and protect landscaping, manage runoff at the downspouts, and walk the plan with you.

• Low-pressure application only — no pressure washer ever touches your shingles
• Treatment mixed for your roof's material and the level of growth on it
• Applied from safe positions, with foot traffic on shingles kept to a minimum
• Landscaping pre-wet and protected, runoff managed throughout
• Honest expectations set upfront on streaks, moss, lichen, and regrowth