Mortar and salt creep question

[littlebigreef]

My open air trough contacts about 30” of drywall on one side. I have a little plumbing going through the wall.



Incidental salt spray is doing some damage. As a longer term solution I mortared a piece of green board, texturized it, and painted. I’m going to attach this at the end of the trough and tack a frame around it.



Question: do I need to worry about incidental salt spray/creep contacting this mortared piece of green board? I intend to keep it wiped down. Highly unlikely it every gets wet.

 

[Timfish]

The green board will hold up a lot better than the drywall but salt creep can be insidious. It sound though from your description you'll be able to replace it failry easily when you need to.

 

[littlebigreef]

*rereading my question I should clarify: do I need to worry about incidental salt creep leaching chemicals from the moarter/green board back into the water? It’s got several good layers of paint.