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When deciding on which at-home solution to use, bleach and vinegar are both effective at removing moss from driveways. Bleach tends to last longer, keeping moss away for up to a year, while vinegar may need to be applied more frequently. However, vinegar is much gentler on the environment, making it a safer option overall.

Clay tile roofs require minimal maintenance, as they stand up very well to the elements and often won’t fade in direct sunlight. They also don’t need sealing. Concrete tiles are also relatively low maintenance, but you will need more maintenance than with clay. You’ll need to seal concrete every few years to improve water resistance, and the color will fade a bit more quickly than with clay.

Ideally, you will tackle removing algae from your roof during spring or summer when the weather is drier and warmer. Because algae tends to grow during the colder and wetter months, you want to tackle this project before the temperature drops to hopefully keep it from coming back at all.

The average cost to clean a roof is around $500, but prices can fall between $150 to $1,000 or more. The size and complexity of your roof are the most significant cost factors, as larger roofs and those with various bump-outs and gables will increase your cost. Your roof material will also make a difference. An asphalt roof will require more labor, as your professional will need to be careful not to damage the shingles. A metal roof can stand up to more intense scrubbing and shouldn’t take as long to clean.