Albany Roofers: Article About Mold Versus Algae
If dark streaks have appeared on a roof, it may be time to contact the local Albany roofers to come inspect the shingles. A roofing professional will be able to determine whether the cause of the streaking is mold, mildew, algae or moss. All these types of organisms have different characteristics, and some of them can be harmful to the homeowner's health and damaging to the roof's protective qualities, so it is important to determine what kind of growth is actually present.
Dark streaking or green-blue spots across a roof are the first signs of growth. Usually by the time the discoloration is visible, the problem has been present and growing for several months. If the problem is mold, it could have been inside the house for even longer.
Mold and mildew are typically caused by humidity inside the home beneath the surface of the roof. Mold spores feed on the wood decking below the shingles and can spread to rafters and other support structures. In addition, mold spores can be dangerous for people with asthma and allergies, and the spores will have direct access to the home's ventilation system. Because mold is internal, the problem will not be visible on the roof until there is significant damage; the roof could appear dark and sometimes sunken where the wood decking has been eaten away.
The roofing contractors at Ideal Construction of Albany can assist you with any questions regarding windows or roofing.
By contrast, algae and moss are deposited on the outer surface of the shingles by the wind and birds. Algae spores such as Gloeocapsa magma are generally not a health hazard but will definitely affect the aesthetics of the roof. Algae growth starts in small patches and quickly turns into large streaks of discoloration. The good news is that algae does not eat away at shingles and can usually be removed with a bleach cleaning solution. Fungi, however, can be harmful to health and will deteriorate the shingles by feeding on the organic materials. It can also be cleaned with a bleach and water solution.
Homeowners will have a hard time identifying the source of discoloration on the roof from a distance. A roofing professional will be able to investigate the shingles and determine whether the growth has occurred on the inside or outside of the roof, prescribing a treatment method to stop any further damage from taking place. If mold and mildew are present, repairs may be necessary to fully remove the spores from inside the house and fix any deterioration in the decking and rafters that has occurred.