How to Differentiate Mold From Algae on Your RoofLooking up, you see dark stains, black streaks on your roof. Are those algae or mold? How can you tell the difference? The top siding contractor in the area, A Cut Above Exteriors, talks about the differences between the two. if the damage from algae or mold stains has escalated.As the area’s siding replacement leader, A Cut Above Exteriors offers several high-quality siding options, chosen for their suitability to the area’s wet and sunny climate. Homeowners turn to A Cut Above for our expertise in roof and siding services. Our James Hardie fiber cement siding is durable, energy-efficient, long-lasting, and attractive.A Cut Above Exteriors is the company local homeowners call for their siding installation and home exterior needs. You can reach us at (503) 334-0733 or by filling out this form and requesting a free estimate. We serve homeowners in Portland, OR. Categories3 Part BlogDoorsGuttersHome ImprovementHome RemodelingRoofingSidingWindows