07-13-2016, 08:08 AM
If you have enough moisture in the interior voids of the wall to corrode the steel framing, then you have enough to grow mold or otherwise rot wood. Moisture is as much a problem in wood structured walls as it is in steel structured walls. With either material, you need follow the proper building practices which keep the moisture out, Such as adequate air movement in exposed spaces, and proper vapor barriers where required.
Instead of the HardieBacker, why not just use a cement fiberboard type siding, like HardiePanel or HardiePlank, which is the same basic material, but is made into lap siding for exterior mounting? This way you are using the lap geometry to avoid the very water intrusion which would rot wood, grow mold, or rust steel.
Instead of the HardieBacker, why not just use a cement fiberboard type siding, like HardiePanel or HardiePlank, which is the same basic material, but is made into lap siding for exterior mounting? This way you are using the lap geometry to avoid the very water intrusion which would rot wood, grow mold, or rust steel.