How to Clean and Maintain Your James Hardie Siding

James Hardie Siding

Use this guide to help you clean and maintain your James Hardie siding.

The exterior of your home can speak volumes about you. Unfortunately, the elements can get in the way of making your home look the best it can. Between the snow and ice of winter and the steamy heat of the summer, Mother Nature will do her best to wear down your home’s siding. If the look of your siding isn’t reflecting the homeowner inside, perhaps it is time to consider re-siding your home! James Hardie siding products utilize the HardieZon system to determine which of their products will be best able to withstand the unique climate conditions of your region. They have also developed a guide for how to clean and maintain your new James Hardie siding. Here’s how to do it!


Some homeowners think taking a power washer to their home’s siding is the best way to clean it out, but this is not recommended as it could damage the surface of the fiber cement siding. Instead, use a garden hose with a nozzle attachment to wash down the exterior surfaces of your James Hardie siding every 6 to 12 months. You may find some more stubborn stains are present on your home exterior – for those, simply use a mild detergent and a soft brush to lightly scrub them down. If you have painted your James Hardie siding, refer to the paint manufacturer’s instructions for more information on proper cleaning techniques.


Maximize your siding’s longevity by keeping a close eye on your gutters and downspouts. Clean out any blocked gutters, pipes, and overflows as needed. Vegetation close to the siding, such as shrubs, bushes, and small trees, ought to be trimmed away from the home to ensure that any sprinkler or irrigation systems do not saturate areas close to the siding.

Reapply caulking once it has begun to show signs of wear and tear. James Hardie recommends that homeowners use caulks and sealants that are permanently flexible for best performance. This ensures that moisture is kept away from the wall cavity.

Repainting and Repairs

James Hardie siding with their trademark ColorPlus technology has a 15-year warranty, guaranteeing the finish of the new siding product. However, if you need to do some touch-ups, make sure you use official ColorPlus paint. Any dents, cracks, or chips that may result from normal wear and tear over the years can be filled using cementitious patching compound.

Get James Hardie Siding Installed, Maintained, or Repaired by Schaefer Siding!

Schaefer Siding and Exteriors is proud to be celebrating 40 years of installing siding, roofs, windows and garage doors in Maryland, Pennsylvania, Delaware and Virginia! We’re both VSI certified and a CertainTeed 5-Star Contractor for siding, CertainTeed 4-Star Contractor for roofing, and Certified ShingleMaster. Contact us today at 410-781-4028 or email us. You can also visit our website for more information. Your satisfaction is guaranteed.

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