Fiber cement is known to be a low-maintenance siding option when compared to many others, including many choices in wood siding. Since it is made to be resistant to a variety of harmful forces – insects, fungus, extreme temperature shifts, rain, UV rays – a lot of the preventative measures you would have to take with other types of siding don’t factor in.
The minimum you’ll have to do on a regular basis is a simple cleaning with a garden hose or a pressure washer to remove surface grime.