--- title: "Roof Algae & Black Streak Removal Naples FL" url: https://naples-pressure-washing.com/roof-algae-black-streak-removal-naples/ date: 2026-10-11 modified: 2026-10-11 lang: en author: "South Florida Exterior Wash" description: "What the black streaks on Naples roofs are, why they spread from roof to roof, and how a soft wash kills roof algae, mold and lichen at the root." image: https://naples-pressure-washing.com/wp-content/uploads/2026/07/Roof-Cleaning-Before-After-1024x572.webp word_count: 1070 --- # Roof Algae & Black Streak Removal Naples FL Service · Naples, Florida Roof Algae Removal Naples FL — *Black Streaks, Mold & Lichen* Those black streaks running down Naples roofs are a living algae called Gloeocapsa magma, and they keep spreading until something kills them. We remove roof algae, mold and lichen with a low-pressure soft wash on any roof type, from $299 for a single-story home. [📞 Call for a Free Quote — 239-544-1165](tel:2395441165) [Part of our Roof Cleaning service →](https://naples-pressure-washing.com/roof-cleaning/) From $299Single-Story Roof Algae12–24Months Before RegrowthAllRoof Types Treated15–30%Less Than Competition "Black streaks are a living algae. They spread, and they have to be killed at the root." [Get Your Free Quote →](tel:2395441165) 🦠 What the Black Streaks Really Are The Problem Gloeocapsa magma is a type of blue-green algae, a cyanobacteria. On its own it is greenish. On a sunny roof it builds a dark outer coating to protect itself from ultraviolet light. That coating is what you see as black. The streak shape comes from rain carrying cells down the slope from where the colony started. It travels on wind and on animals, so once one roof on a street is streaked, the rest tend to follow. Spores land, find moisture and minerals in tile, shingle or concrete, and start a new colony. In Naples the warm, humid weather lets it grow almost year round. Algae is usually the first stage. Over time, the damp layer it holds becomes a base for mold and lichen. Lichen is a tougher crusty growth, gray-green or orange, that grips the roof surface. It is common on older tile roofs and shaded shingles here. None of this fixes itself. Rain does not wash it away. A streaked roof also holds more moisture after storms and looks older than it is, which matters to buyers, associations and insurers. ![Black algae streaks compared to dirt on a Naples roof](https://naples-pressure-washing.com/wp-content/uploads/2026/05/Naples-Roof-Stains-When-Its-Mold-vs.-Dirt.webp)Algae streaks run in lines from the ridge. Dirt tends to sit evenly.Mold or dirt?Dirt sits evenly and tends to wash off in rain. Algae runs in streaks from high points, thickens on shaded slopes and comes back in the same pattern after a rinse. 💧 How a Soft Wash Kills It Method ![Roof after soft washing removed algae and black streaks](https://naples-pressure-washing.com/wp-content/uploads/2026/05/Does-soft-washing-really-remove-algae-moss-black-streaks-and-other-organic-growth.webp)Dead growth continues to rinse away with the next few rains.Killing roof algae takes a cleaning solution that reaches the cells through their protective coating. Our soft wash mix does that. It is applied at low pressure across the whole roof, including slopes that still look clean, since early growth is often invisible from the ground. The black color starts to fade within minutes on light growth. Heavy streaks and lichen take longer. Dead growth keeps loosening and washing away over the next several rains, so roofs often look better a week or two after the visit than they did when we left. Lichen takes patience. Scraping or blasting it off pulls up tile surface and shingle granules. We treat it and let the solution and weather break it down. We also tell you what is feeding the growth on your roof. Overhanging branches, clogged gutters that keep the eave wet and sprinklers hitting the roof edge all shorten the time between cleanings. | Growth | What It Looks Like | Where It Grows | How We Treat It | | ------ | ------------------ | -------------- | --------------- | | Gloeocapsa magma algae | Black streaks down the slope | North and west slopes, under trees | Soft wash, full roof | | Green algae | Green film or haze | Shaded, damp areas | Soft wash | | Lichen | Crusty gray-green or orange spots | Older tile and shingles | Treated, never scraped | | Mold and mildew | Dark fuzzy patches | Eaves, valleys, shaded corners | Soft wash, extra dwell | | Moss | Thick green clumps | Deep shade, rare in Naples | Treated, left to release | 🏡 Black Streaks by Roof Type Every Roof Concrete tile ### Streaks in the texture Porous tile holds water and minerals. Streaks spread across the tile face and thicken on ridge caps. Asphalt shingle ### Streaks along the courses Algae feeds on limestone filler in many shingles. Granules must stay in place, so pressure is never used. Metal ### Growth on ribs and laps Less common, but it grows where water lingers. A finish-safe mix and a full rinse are used. Clay barrel tile ### Growth in the pans Water sits in the pan between caps. Barrel roofs are cleaned with the same no-walk approach. 💰 Roof Algae Removal Prices Starting Prices Algae removal is priced as a roof cleaning, based on size, pitch and roof type. Single-story roofAlgae, mold and lichen treatmentFrom $299Tile roof + ridge capsFull tile field and capsFrom $349Two-story or larger roofAdded height and reachFrom $399Roof + house comboRoof algae and wall mold togetherFrom $599HOA and condo roofsMeasured on a free walk-throughCustom QuoteNeighborhood schedulingBecause algae spreads from roof to roof, some streets book several neighbors on the same day. We handle gate coordination with most major Naples communities. 📋 Our Algae Removal Process Step by Step 1 #### Identify the growth We confirm whether you have algae, lichen, mold or plain dirt, and note your roof type. 2 #### Find the source Trees, gutters and sprinklers that keep the roof damp are noted and shared with you. 3 #### Protect the landscaping Plants and lawn near the drip line are soaked with fresh water before treatment. 4 #### Treat the full roof Solution is applied at low pressure to every slope, with no walking on tile. 5 #### Rinse below Plants, walls and walkways are rinsed. The biodegradable solution breaks down within hours. 6 #### Follow the fade We explain what to expect over the next few rains and leave a written service record. 📍 Areas We Serve Collier & Lee Counties We provide **roof algae and black streak removal in Naples FL** and throughout Southwest Florida: NaplesNorth NaplesBonita SpringsEsteroMarco IslandPelican BayPark ShorePort RoyalOlde NaplesGrey OaksTiburonMediterraFiddler’s CreekLely ResortVanderbilt BeachAve Maria ❓ Frequently Asked Questions Roof Algae Removal Naples FL What causes black streaks on roofs in Naples?A blue-green algae called Gloeocapsa magma. It grows a dark coating to protect itself from the sun, which shows up as black streaks.Is roof algae harmful to my roof?It holds moisture on the roof surface and feeds tougher growth like lichen. Over time that can wear on tile surfaces and shingle granules.Can my neighbor's roof spread algae to mine?Yes. Spores travel on wind and animals, which is why streaks often show up on several homes on the same street.Why are some streaks still there right after treatment?The algae is killed on contact, but dead growth takes a few rains to fully wash away. Most roofs keep improving for a week or two.How long does roof algae removal last?In Naples, a soft washed roof usually stays clean for about 12 to 24 months.Do zinc or copper strips stop roof algae?They can slow growth on the area below the strip. They do not clean an existing problem, and coverage is limited on wide roofs. 🔗 More on Roof Cleaning Main service page Main service**Roof Cleaning in Naples FL**[Pricing, process & service areas →](https://naples-pressure-washing.com/roof-cleaning/)