West Michigans Premier Roof and Exterior Cleaners - Great Lakes Roof & Exterior Cleaning. At first, dirt, algae and fungus damage on your roof or exterior doesnt seem like much. Then, mild embarrassment might creep in. Eventually, youre worried its so bad you need to replace your roof or siding. Not necessarily. Great Lakes Roof & Exterior Cleaning takes care of both commercial and residential markets, using soft-wash cleaning methods that wont cause damage to get rid of unsightly stains before they become intrusive problems. Your professionally cleaned roof, exterior and gutters will look brand new and last longer thanks to our fast, affordable process.