White Spots On Roof Of House

White stains on slate roofs efflorescence or salt stains from rain water sometimes appear on slate shingles.

White spots on roof of house.

In the absence of direct sunlight it shoots the spores at highly reflective surfaces such as white house siding. When you see white spots on the surface of certain materials such as concrete or stone they are not always mold. Algae will devour your shingles and is also attracted to moisture. The acid from the bird pewp eats at the clear coat then the sun makes it worse.

How do we keep that fungus among us under control. So when the spores land on moisture deposits on your roof they will make a home for themselves there. Trees plant debris stains stain patches under trees or nearby may be due to seeds berries leaves and other debris falling and decaying. White mold can be found anywhere conditions conducive to mold growth are present.

And of course the black spots show up better on white surfaces so they are noticed more easily. White stains on slate roofs may indicate roof age. Are those spots alive. Graphic left courtesy spray and forget mildew and moss remover.

Many old buildings with prominent concrete brick or stone parts often show signs of efflorescence. Postby sstupid sat jul 09 2016 7 17 pm that first pic was definitely an old bird pewp spot. When the water evaporates a white fluffy structure is left behind. This is a term for crystalline salt deposit that is commonly found in masonry structures.

Common areas of white mold growth include attic sheathing and crawlspace framing. In nature the artillery fungus shoots its spores towards sunlight. White spots appearing on roof. White or less black roof surfaces may also be found below copper or aluminum flashing whose salts run down the roof surface in wet weather preventing algae or moss growth and leaving a white area on an otherwise stained roof surface.

White stains formed on roofing slates such as in the roof pictured here are almost always a white mineral salt deposit or effloresence left by the evaporation of water that was absorbed into and that dissolved salts within the roofing slage. It s just regular old clear coat degradation due to sun exposure. This growth while harmless can appear very similar to white mold growth. Spreading across your roof the ideal place for algae to spawn is somewhere damp and humid.