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JH Fiber cement board Mold/Maintenance issues???

13 years ago

I'm in the process of choosing colors for an exterior remodel and the contractor who was working on my neighbor's house came over to talk. He said that most people don't realize that hardiboard is not maintenance free. Unlike vinyl that can be hosed down, hardiboard needs to be scrubbed because of the woodgrain impressions. He also said that the board expands and contracts because it is a wood product and that eventually causes the caulk to fail. To make matters worse, he stated that mold is a common problem and is explicitly excluded from the James Hardie warranty. (He's right on that one.) I looked up more info on JH and found this - Unlike a wood or vinyl siding, Hardie siding will resist mold and mildew. As with a wood or vinyl siding, you will notice that every other month or so you must clean the exterior of your home to avoid the growth of mold and mildew.

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