Metal’s Benefits

Mold, Mildew, and Algae Resistance

If you live in a humid climate, you’ve probably seen the unsightly black staining that often occurs on asphalt shingle roofs after a few years. Unbeknownst to most homeowners, this common phenomenon is caused by airborne algae that collect on the roof and then grow in moist areas, producing stains that look like black streaks. Since asphalt shingles can absorb moisture and stay damp for extended periods of time, they can create a fertile environment for the growth of these and other microorganisms.

Close Up Algae Metal roofs are very resistant to this type of staining for several reasons. First, the smooth, hard surfaces of metal roofs make if difficult for airborne debris, dust, and plant materials to collect. Also, metal roofs don’t absorb water, eliminating the damp, fertile, environment that can lead to growth. Finally, metal roofs can be thoroughly cleaned without risking damage to the roof. So, in addition to better protection against algae staining, metal roofs also provide much better resistance to the growth of mold and mildew. Eliminating these unsightly, and sometimes unhealthy organisms from your roof will help ensure your home stays beautiful and maintenance-free for many years.