At first glance, mold and algae on roofs may look the same. However, they can affect your roof in many different ways. In this blog post, Polk Contracting, Inc., the trusted residential roofing contractor in the local area, shares the key differences between the two.
Algae is a common roofing issue, especially in areas with high humidity. It often appears as a green, blue-green, or black stain and can cover large portions of your roof. This plant-like organism thrives in moisture and can spread rapidly, particularly in areas of the roof that receive shade due to trees. While algae is primarily an aesthetic concern, its presence can degrade your roof’s reflective capabilities, leading to higher home cooling costs.
Mold on roofs, meanwhile, presents more than just an aesthetic issue; it can indicate more significant moisture problems and can potentially affect indoor air quality once it spreads indoors. Mold tends to show up as irregularly shaped spots that can be black, green, or blue in color. It often accompanies the rotting of roof materials in damp climates, signaling the presence of excessive moisture and poor ventilation.
Recognizing whether your roof is suffering from mold or algae is the first step towards effective treatment. Algae typically present as uniform staining and discoloration across roof surfaces, mainly in streaks or patches that follow the direction of water runoff. In contrast, mold growth is more sporadic and disorganized, potentially affecting various parts of the roof and the interior of your home if ventilation is inadequate.
Professional assessment and treatment are imperative to ensure the safety and integrity of your roof and home. For algae, solutions may include specialized cleaning agents applied by professionals to avoid damaging the shingles. For mold, addressing the underlying moisture issue is crucial, along with professional removal to ensure it does not affect indoor air quality or further compromise roof materials.
Implementing preventative measures is key in avoiding the recurrence of algae or mold. This includes ensuring adequate roof ventilation and regular gutter cleaning and trimming tree branches to increase sunlight exposure on the roof. If planning a roof replacement, choose asphalt shingles equipped with copper granules to minimize algae growth.
As one of the area’s top roofing and siding contractors, Polk Contracting can provide you with exceptional solutions to all your home improvement needs. With our quality products from the most trusted brands, and our skilled, professional crew, we’ll make sure your project is completed to quality specifications. Call us today at (410) 994-2801, or fill out this contact form to schedule your evaluation. We proudly serve homeowners in all of Harford, Cecil, and Baltimore Counties.