Both mold and algae can show up as dark or other colored stains on building ecterior surfaces.
Stains on roof near chimney.
Chimney flashing installs at the lower sides.
Here are some clues to follow.
Black or other colored stains may also appear on roof surfaces from nearby industrial activities.
Black or other colored chimney soot stains on roof surfaces may be caused by soot from chimneys both wood fired and oil fired devices.
4 chimney flashing causes leaks the flashing is what keeps water from going into the place where the brick structure comes through the roof or otherwise comes close to the roof there s a fairly large gap between the bricks and the roof and water will pour through that hole if it s not sealed up.
Effloresence is a mineral salt left on the surface as water evaporates.
A white powdery fluffy soft or crystalline stain found on masonry surface is usually efflorescence.
See black bleed through shingle stains black bleeding stains from asphalt shingles extractive bleeding.
Solution for a small leak.
Sometimes roof stains around chimneys are indeed from ingredients in the exhaust from the chimney particularly sulfates.
If your ceiling has a plastic vapor barrier between the drywall and the attic insulation push the insulation aside and look for flow stains on the plastic.
Carlos aragon owner of aragon chimney services in derwood md 301 706 8564.
Rust or chimney soot stains red or brown rust stains around chimneys is a common roof stain.
Trees plant debris stains.
These growths may appear on natural wood stained wood paitned wood vinyl or other plastics aluminum and many other materials even masonry or stone.
If you notice water stains on the ceiling near a fireplace and the roofing isn t damaged there s a good chance the chimney flashing needs attention.
Most often red roof stains around or below metal components or chimneys are rust easily tracked to corroded metal components.
You can see examples of rust stains in the photos and article above.
Stains on a chimney exterior surface.
These questions answers about stains found on or at chimneys themselves both on the building exterior and in the building interior at walls or ceilings near chimneys were posted originally at chimney stains leaks please be sure to review the advice given there.
He would inspect to make sure the bricks and mortar were in.
The area can be cleaned.
Some roof leaks are tough to locate.