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ROOFING INSPECTION & REPAIR ASBESTOS CEMENT ROOFING ASPHALT ROOF SHINGLES ASPHALT SHINGLE DEFINITIONS ASPHALT SHINGLE FAILURE TYPES ALGAE, FUNGUS, LICHENS, MOSS COMPARED ALGAE STAINS ON ASPHALT ROOF SHINGLES ALGAE STAIN TEST METHODS ALGAE, FUNGUS, LICHENS, MOSS on SHINGLES BLACK STAIN REMOVAL & PREVENTION BLISTERS on ASPHALT SHINGLES CRACKS in FIBERGLASS SHINGLES CUPPING ASPHALT SHINGLES CURLING ASPHALT SHINGLES FISHMOUTHING ASPHALT SHINGLES GRANULE LOSS from SHINGLES HAIL DAMAGED SHINGLES LADDERING & STAIR STEPPING SHINGLES LIFE / WEAR FACTORS in SHINGLES MECHANICAL DAMAGE of SHINGLES MOSS & LICHENS on SHINGLES ORGANIC FELT SHINGLE DEFECTS SPLICE DEFECTS on ASPHALT SHINGLES STAINS on ROOF SHINGLES WHAT ARE ASPHALT SHINGLES BUILT UP ROOFS CERTIFICATIONS for ROOFING CONTRACTORS CHIMNEY INSPECTION & REPAIRS CHOOSING A ROOFING CONTRACTOR CLAY TILE ROOFING FIRE RETARDANT PLYWOOD LOW SLOPE ROOFING MATERIALS MEMBRANE ROOFS METAL ROOFING TYPES MODIFIED BITUMEN ROOFING ROOF INSPECTION SAFETY & LIMITS ROOF VENTILATION SPECIFICATIONS ROOF VENTING ENERGY SAVING DETAILS SLATE ROOF INSPECTION & REPAIR SLATE ROOF DURABILITY SLATE ROOF REPAIRS SLATE ROOF SOURCES SLATE ROOF TYPES SLATE ROOF PHOTO LIBRARY SLATE ROOF INSPECTIONS SLATE ROOF INSPECTION CLASS SOD ROOFING SIDING WOOD STAIN DIAGNOSIS on Building Exteriors STAIN DIAGNOSIS on Roofs Causes of Roof Stains Catalog of All Roof Stains Catalog of Black Roof Stains Black Algae ALGAE STAIN TEST METHODS Black Stain Removal & Prevention Bleed-Through Chimney-Caused Roof Stains Debris Staining on Roofs Lichens on Roofs Moss on Roofs Rust Stains on Shingles Soot Staining on Roofs STAIN DIAGNOSIS on Indoor Surfaces STAINS on Indoor Surfaces: PHOTO GUIDE STANDARDS for ROOFING STONE ROOFING THATCH ROOFING WARRANTIES for ROOF SHINGLES WOOD SHAKE & SHINGLE ROOFING WORKMANSHIP & WIND DAMAGE More Information InspectAPedia Blog - News Updates Air Conditioning & Heat Pumps Bookstore Electrical Environment Exteriors Heating Home Inspection Insulate Ventilate Interiors Mold Inspect/Test Plumbing Water Septic Roofing Structure Accuracy & Privacy Policies Contact Us |
Here we discuss debris on building roofs as a source of stains and roof damage. This article series tells readers how to identify & explain the most-common causes of black, brown, red, gray, green, or white stains appearing on roof shingles and on other building surfaces. Roof shingle stains are often caused by black algae, bleed-through or extractive bleeding of asphalt, dirt, soot, or organic debris. See Causes of Roof Stains and Catalog of All Roof Stains for the causes and types of stains that occur on building roofs. There are other sources of roof staining, from cosmetic to harmful to the roof. For the diagnosis and cure of other building stains, see STAIN DIAGNOSIS on Building Exteriors and STAIN DIAGNOSIS on Indoor Surfaces. © Copyright 2010 Daniel Friedman, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website. ROOF DEBRIS STAINING - Black & Brown Debris Stains on Asphalt Shingle Roofs
Decaying debris may encourage fungal or algal growth (cited above). Lichens or even thick moss may also grow on such roof areas. Debris, lichens, or moss on a roof will shorten its life by holding water on the roof surface, preventing drying, and (in cold climates) adding wear and tear on the roof surface by freeze-thaw cycling. In contrast, debris from an upper roof gutter that spills onto lower roof slopes may result in tan, white, or other stains depending on the metal of the gutter and the length of time that leaves and debris rest in it. (Photo at left). The decision to permit the upper roof gutter to spill down the lower slope also risks creating an early wear-area and thus leaks on the lower slope roof. Remedies for black or brown or gray debris staining on asphalt shingles: As cited above, cleaning off debris (gentle sweeping or washing, watch out for damaging the roof during cleaning), or cutting unnecessary overhanging tree branches may help. See Proximate cause roof shingle stains and also see ALGAE, FUNGUS, LICHENS, MOSS on SHINGLES for details about these growths on buildings. ... Technical Reviewers & References
Use links just below or at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website. ASPHALT ROOF SHINGLES
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06/30/2009 - 09/01/1995 - InspectAPedia.com/roof/Black_Roof_Debris_Stains.htm - © Copyright 2008-1995 Daniel Friedman All Rights Reserved - InspectAPedia® is a Registered U.S. Trademark