localhost wrote:
ok marine grade pressure treated plywood i do not see any issue with that as i know pressure treated plywood is pretty much immune to rot unless its outside exposed to the weather and the lauan plywood has me a bit worried as i have used this stuff before for backs of cabinets its not very strong and it warps quite a bit unless its well secured to a rigid frame now the fiberglass they apply to it might help with keeping moisture out of the wall but this seems like a not so great choice if it works it works like somebody said the delaimnating issue on the outside most of the time now i am not worried about a flood just maybe steaming up the shower and opening the bathroom door and going to bed or maybe a cooking mess involving a spaghetti water spill its a full time lived in home not a get away what can be done to seal things up if need be i have read about the sewer solution malfunction with the presure release vent valves flooding out a coach my boss wants to use the sewer solution on his coach so we have to either account for this possibility or use a different product now at point does water become a problem is a long hot shower a problem is spaghetti water a catastrophe 6 months after the fact even if its wiped up right away or is none of this an issue
I don't think you are supposed to use PT lumber in the interior as it can be toxic. If you are that concerned I would use tile on the floor. frankly I think you want to stick to products that are standard or at least common in the RV industry. I am really trying to understand exactly what it is you are doing and working on. Long showers and water spills are not really issues with current materials and exhaust fan. Neither are sewer explosions. Am I missing something? Pressure relief valves flooding a coach???? Sorry I am not following. Sewer solution is a dump/flush using a hose. Are you talking about a macerator? Again no pressure. I don't get it.