Moss can severely damage, even destroy, a roof, by breaking down the fibers in the shingles, forcing them apart and allowing leaks to occur. Many roofs must be replaced prematurely due to damage caused by moss that has been neglected. Fungus, algae and mildew are less damaging to a roof than moss, in terms of actual destruction. Another reason is that fungus reduces the ability of the roof to reflect away light and heat, thus making for higher air conditioning bills . It depends on the area.
Some areas have mostly fungus, while others have more moss.
Z- Stop works on all moss and fungus, algae and mildew. If the customer has a moss problem, it can reduce the life of the roof by years. Also, each time the other treatments are applied, the roof must be walked on which is hard on the roof. Each coil is individually wrapped and attractively labeled. Z-Stop Nails are short, neoprene washered, annular ring, galvanized roofing nails.