Lichen treatment
Lichen spots are killed at the root instead of being scraped off.
Exterior Services
Roof Cleaning Glen Ridge, NJ
A Glen Ridge roofer can remove dark roof stains, lichen and debris, with tips to keep the streaks from returning. Dial (862) 357-6041 to talk with a local roofer about cleaning your roof.
Dark streaks on a roof are usually a type of airborne algae, often called Gloeocapsa magma, that feeds on the limestone filler in many asphalt shingles. It forms a dark outer layer that shows up as streaks following the path of rainwater. It is mostly a cosmetic problem at first, but lichen and moss tend to move in alongside it, and those do damage shingles over time.
The method decides whether cleaning helps the roof or shortens its life. A pressure washer strips granules, lifts shingle tabs and drives water under the roofing, which is why low-pressure methods are the standard. Soft washing uses a cleaning mix and gentle rinsing to kill algae and lichen, and lets the roof dry naturally.
A few details help plan the cleaning. Look at whether the growth is flat staining, crusty lichen spots or thick moss, and whether it is worse under trees. It also helps to know what is growing beneath the roof edges, since plants are protected during the wash.
If the problem goes deeper than it first looked, a Glen Ridge roofer may also recommend roof moss removal or gutter cleaning.
Need roof cleaning in Glen Ridge? Call (862) 357-6041 to talk to a local roofer.
Call nowThe process
How roof cleaning works
Here is how a roofer typically cleans a roof.
Start with a look
The roofer checks the roof material, the type of growth and the condition of the shingles, flashing and vents before cleaning. A roof in poor shape may need repairs before cleaning.
Cover the plants
The crew wets down plants and grass and moves outdoor furniture away from the walls. Downspouts may be diverted so runoff does not pool in garden beds.
Treat the roof
A cleaning solution matched to the roof material is applied at low pressure, from the bottom of the slope up. Shingles, tile and metal each get a solution suited to them.
Rinse gently
After the solution works, loose debris is swept from valleys and the gutters are cleared. Lichen often releases over time after it dies.
Rinse the plants
The area below the eaves gets a final rinse to dilute any runoff. This is a good time to ask about preventing regrowth.
What is included
Roof cleaning a roofer can handle
Metal roof cleaning
Tile and metal roofs get a cleaning suited to the material so the surface is not harmed.
Streak cleaning
Algae staining is cleaned off without scrubbing so the roof color comes back.
Debris removal
Built-up debris is swept off the roof before it holds moisture.
Zinc strips
Zinc or copper strips can be installed near the ridge so rain carries metal ions down the roof.
Related service
Roof Soft Wash Glen Ridge, NJ
Soft washing is the low-pressure method used on most roofs, relying on a cleaning solution rather than force. A common soft wash uses a diluted chlorine solution with a soap-like surfactant so it stays on the roof long enough to work. Because it kills the growth rather than scraping it off, the roof stays clean longer than with pressure washing.
In Glen Ridge, a soft wash is the safe choice for asphalt shingle roofs with algae streaks. The key is protecting what sits below the roof, since the solution can harm plants if it is not diluted or rinsed. Results show quickly on algae, while lichen releases more slowly.
Related service
Roof Cleaning Service Glen Ridge, NJ
Professional roof cleaning covers prep, treatment, debris removal and cleanup, done from a ladder or with roof safety gear. Roofs become slick once wet or treated, and falls from roofs are a real hazard. While cleaning, a roofer can flag loose shingles, cracked tiles and failing pipe boots.
For Glen Ridge homes, it often makes sense to clean the gutters right after the roof. Adding zinc strips along the ridge is a common way to stretch the time between cleanings. Trimming branches that shade or drop debris on the roof also helps.
Local help
Roof Cleaning Near Me
In Glen Ridge, roofs under trees and on north-facing slopes tend to stain first. From Glen Ridge out to neighboring towns such as East Orange, North Arlington, Caldwell and Clifton, older roofs often need lichen and moss treatment while newer ones usually just need streaks removed, and catching growth early makes the cleaning easier on the roof.
Need roof cleaning around Glen Ridge? Call (862) 357-6041 for a Glen Ridge roofer who serves the towns around it too.
How the weather here affects roofs around Glen Ridge
Winters here are long and cold, with snow on the roof for weeks at a time and plenty of nights below freezing. Heat escaping from the attic melts snow on the upper roof, and the water refreezes at the colder eaves, building ice dams that push water up under the shingles. Coastal storms and heavy spring rain drive water sideways into flashing, valleys and old chimneys. Most homeowners in Glen Ridge, NJ have the roof checked in the fall and again after the snow melts.
Why call
Why not wait
Less damage
A roof problem fixed early rarely spreads to the decking, the insulation or the ceilings.
Local knowledge
Local roofers see the same roofs and storm damage across Glen Ridge and nearby towns.
Know what happens next
Ask the roofer about the cause, the options and the estimate before work starts.
Roof Cleaning questions
How are plants protected during roof cleaning?
Plants are protected by soaking them with fresh water ahead of the cleaning and rinsing them again when it is done. Delicate plants can be covered, and downspouts can be directed away from beds. Let the roofer know about delicate gardens so they can plan.
When should I clean my roof again?
Many roofs go several years between cleanings. Sunny roofs with good airflow stay clean longer. Cutting back trees helps too.
Can I pressure wash my roof?
Pressure washing is not recommended for asphalt shingle roofs. It wears down the surface that protects shingles from the sun. Soft washing is the safe alternative.
Does roof cleaning make my roof last longer?
Algae is mostly cosmetic, but lichen and moss can shorten roof life. It doubles as a chance to check the roof surface. The benefit depends on using a soft wash.
What causes black streaks on my roof?
Those dark stains are almost always airborne algae, not dirt. The algae forms a dark outer coating that shows up as long streaks. Algae-resistant shingles slow it down, but even those can streak over time.
More questions? Call (862) 357-6041
Often needed together
Roof Moss Removal
Removing moss from shingle, shake and tile roofs without tearing up the roofing, and repairs to any shingles the moss damaged.
Learn moreGutter Cleaning
Gutter cleaning that clears leaves, needles and sludge by hand, then flushes the gutters and downspouts, before overflow rots the fascia.
Learn moreRoof Maintenance
Regular upkeep that keeps small roof problems from becoming leaks, before debris, wear and weather add up.
Learn moreCedar Shake Roof Repair
Replacing split, cupped or missing shakes, clearing moss and fixing valleys and ridge caps, without tearing off the shakes that still have years left.
Learn more
Looking for something else?
See all roofing servicesTalk to a Glen Ridge roofer about roof cleaning
Call (862) 357-6041 to talk to a roofer serving Glen Ridge, NJ.