Sealing Underbelly Seams

rhagfo wrote:
If they are a snug fit I would not seal, otherwise any moisture that got inside there would have a tough time getting out.

JMHO but I agree 100% with this. We had a small leak in our Kitchen faucet recently (copper tube inside split) & noticed it only because I saw water dripping from one of the edges of the corroplast that overlapped the frame. This was a couple hours after we set up so it took a awhile to work it's way down. Other than it not being sealed watertight alerted us to the problem, I'd hate to think what the outcome would have been if the entire underbelly filled up with water! I can imagine water soaking everything or worse the belly dropping down because of the weight on the road. FWIW my previous trailer had some standing water when I dropped the belly to install SeeLevel gauges & the straps holding up the water tank were badly corroded. It was sealed with the black foam all around & penetrations.

Thank you all so much.
Apparently the underbelly came from the factory with a one piece polyproplylene lining.
Obviously the PO had to get underneath to do something and it has 4-5 seams now.
I will take your advise and try the gorilla tape this weekend on the seam areas and see how it holds up. Definitely want something removable in case of repairs.
Thanks again for your input and ideas.

I used Gorilla Tape. I also punched very small holes at every point where it sagged for water drainage.

Had to cut into mine to access an electric dump valve. Resealed with that metal tape stuff. Stays put yet comes off clean when you need to gain access again.

I only sealed mine where it had been hacked open by PO. I used gorilla tape. So far so good.

since the plastic sheets overlap why don't you just put a couple of self tapping screws along the overlap on each seam. Then water can still have a escape route if you get a leak, it will be easy to get inside if you have to fix something (no glue).

EXACTLY on the repair pointed out by Puggslyyy...we just had to pull down our sealed underbelly to have a dump valve repaired. Luckily, it was not one continuous piece.

Probably no harm in sealing it up most of the way (you still want to leave a little space for water to drain) - I understand wanting to keep pests out.

Don't seal it to securely - that almost guarantees you will have to pull it all apart in the near future to do a plumbing repair. :)

Nutinelse2do wrote:

robsouth wrote:
Do you suppose it is not sealed for a reason? Just sayin'.

If we knew, I wouldn't be asking. So since you have input, is it supposed to be sealed? Isn't it a critter entry point?

I am asking a legitimate question, and looking for answers. Sorry, we are not the all knowing masters of the 5th wheel. If anyone has answers to my above questions, I would appreciate a sincere response. Thank you

I think you got a very legitimate answer to your question,designed to provoke some thought,why don't you ask the dealer or manufacture.What do you want to do?Seal it entirely,prevent any ventilation,heat loss,dust intrusion,what size of critters.You are questioning the design ask the designers.The rest of us are just offering opinions.Is it a problem as designed?

robsouth wrote:
Do you suppose it is not sealed for a reason? Just sayin'.

If they are a snug fit I would not seal, otherwise any moisture that got inside there would have a tough time getting out.