Good news! Your siding is very low maintenance. Fiber cement (also known as composite, engineered, Hardiplank or cladding siding) may be a bit more expensive than other types of siding, but its resistance to fire, wind, rot, insects, UV rays and rain more than makes up for the initial cost. You only need to do a few things each year to keep this type of siding in tiptop shape.
Caulk. Any area where your fiber cement siding meets another building material (window sill, brick, doorframe, trim, etc.) is particularly vulnerable to moisture and will generally have a layer of caulk between it (this area is called a caulk joint). Check these areas carefully once a year and make sure there are no holes, cracks or other signs of deterioration in the caulk. If you find any damage, you can either repair the caulk yourself or hire a handyman to tackle the job.
Wash. Wash your siding free of dirt and grime at least once a year. If you can, rent a pressure washer from your local home improvement store to remove any accumulated dirt or insect nests (be careful not to set the pressure so high that it starts to remove the paint from the siding). A high-pressure garden hose will work, too. When you wash, start at the roofline and work your way down the sides of your house. Always observe proper ladder safety if you use one for this step.
Paint. Fiber cement siding holds paint extremely well, so you only need to repaint every 10 or 15 years! When it is time to paint, never use a stain. Only use exterior-grade acrylic paint.