Cemplank Siding

Anyone have experience cleaning this type of siding?

After additional research, I’m thinking this product is like Hardie board. It’s a cement fiber.

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Never heard of it but looks strikingly similar to Hardie.

1% SH or less?

Test spots on each wall–especially those with direct sunlight exposure.


test because you also may not be aware of the kind of paint they used.


Newer Hardie has integral coloring, but you never know what the finishes are, or how they will react to SH.

If anyone runs across this Cemplank product, it is in fact, a James Hardie product. I spoke with a couple different suppliers, and they are confirmed that it is simply just a style of Hardie board.