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Question:

Can I use cement boards instead of plywood boards for exterior walls under siding?

I would like to make my exterior walls more resistant against water and termites, so I would like to put cement boards instead of plywood boards before installing new vinyl siding. It costs a bit more but I think it would be worth it.

Answer:

It would cost double the amount of plywood .The nails won t hold good in just the cement board.When nailing into the cement board you may pound through the cement board if there is no wood support under it, but other than that there is no reason you couldn t. In other words I wouldn t suggest it. GL
May 11, 2017

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