The answer to 'why is my paver brown patches' is that there are a few common causes, including dirt buildup, mold or mildew growth, and mineral stains. Brown patches on pavers can be caused by dirt and debris accumulating in the paver joints, which can lead to discoloration over time. Mold or mildew growth can also cause brown or green patches, especially in damp or shaded areas. Mineral stains from water sources like sprinklers or runoff can also leave brown marks on the pavers.
To fix brown paver patches, you'll first need to identify the underlying cause. For dirt buildup, you can try sweeping the pavers and filling the joints with fresh sand or polymeric sand. For mold or mildew, use a paver cleaner or diluted bleach solution to scrub the affected areas. Mineral stains may require more intensive cleaning with an acid-based paver cleaner. If the discoloration is severe or persistent, it's best to consult a professional landscaper or paver specialist for a more thorough solution.